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MICROCOPY DESOIUTION TKT CHA»T 
 
 lANSI and :S0 TEST CHART No, 2l 
 
 •is 1^ nil 2.2 
 
 36 
 
 to 
 
 2.0 
 
 1.8 
 
 1.6 
 
 A ^PPUEDjyHGE 
 
 1653 Eost Mom SI'Ml 
 
 f^ochestcf. Ne* York l*C09 uSa 
 
 (716) 482 - OJOO ■ Phone 
 (7'6) 288- 5989 - Fat 
 
REPORT 
 
 OF THE 
 
 CAN.^DIAN ARCTIC EXPEDITION 
 
 1913-18 
 
 VOL. VII : CRUSTACEA 
 
 PART I: OSTRACODA 
 
 FRESHWATER OSTRACODA FROM CANADA AND ALASKA 
 
 By G. O. Sars 
 
 G 
 
 1 '9 1 3 
 
 V . Oi.>7 
 pt; . I 
 
 
 PKI.VTEn TO THE Kl.N.i - Mu.-r l-.\CT:i,I,r.NT MA.Il;iTy 
 
 I sufd July, 28, 1925 
 
R rt of the Canadian Arc'Jc Expedition, 1913-18. 
 
 \uM'>ii: VIII: MOI.M Hk.s KciiiNoiiKKMs, (-oi:i.I':\ti:kati:s, kt»\ 
 
 Part A: Mol.l.t - I^S. HI i |;nT WP I'l.lIS'l i h 1 NI:. I(y Willmni li. ImII. 
 
 I- ••< i .V. !■,„ ' 
 
 Vnn n ( 1 rilAI nl'iiliA \\|) I'llJjOI-oDA 
 
 i ~ .1 ji'ttn' nt ir\ llfport' . . . . 
 
 ( .■|,l,:il..|>..la ■ Hv .■^. I' UlTfV. 
 
 I'i.i..|.."lii^ Hv Win. II. Hall 
 
 I'art C: 1 I ||l\iil>: liM- I'v .\u'tin H. (lark . 
 
 I'urt I): li l;^ iiZiiA. Hv I!, c'. (muirn 
 
 I'»rt I.: H(H AliililV. Hv II. K. Iljirriiii; 
 
 I'lirt K- < II \IHi(,\ \-r,|A. Hv \. <;. liiint.iriuii 
 
 tJiS). 
 
 , fji, 
 
 1 
 
 .... i /...i .1 ..(, 
 
 i/«»u..( Arr i •'■ t'l-n,, 
 
 I /'I !:•• luf ,lil,n). 
 
 I'art (!: .\ I.( V< >.V.\ MIA .\M) A( I INAKIA. H.v A. K. Vcrrill (/mu' / .1 rn/ '?,«. t>4it)' 
 
 Part II. MI.IX >Ai: A.\n rn.Mii'iKiHA. I'v II. li. Hi^., :,,«■ (l.^.-„..: .Junr SO /.<-J'/i 
 
 Part I: ini)l!'iIl!S. l.y « '. M-'l.'^nn l-'ni-r U»<.U'' .1 nvn.-/ J4, ;.>«•)! 
 
 Port J: l'(»KIIi:UA. Hy A. 1 i,r..ly am! 1.. \l I m .liriik 1/-.-1/. / Ji,/j, ,5, 1.^,41. 
 
 voi,i mi: IX: .%nm:i.ii>s, r.tK.tsirrc uoioi.s, fkuto/ua\s, i.tc. 
 
 Part A: OI.K loCIIAl.TA. 
 
 I.uiiiljri' ijliila". Ily I'rank Smith. 
 
 I^ncliylniiidit. Hv I'liul ."'. Welch (frmml .'<. ;»(«//.. r !:i I3t9) 
 
 Part H: l'( >I.M 11 A!, lA. Ity li;,l|>h V. Chamberlin ^h^u,,l .\,„.,„h,r w i't<^,{ 
 
 Part (■; IIIHri >l Xi;.\. Hv .1. 1'. Mr>.,rc (hni'l F.l.rw,, ',' /'('n 
 
 Part 1': (:i:i'IIVI!l,A. I'v Ifalpli V. Cliamherlin '.'. , .il^.<w» .h,;. !■> fr-iii' 
 
 Part 1;. AiANI'IlOi KI'IIAIA. I'y II. J. Van Cleave /wu.rf 1 i,r,i 7' (.'<M) 
 
 Part r- NrM.yroPA. HvX.A.r„l,i, ^7„ „-,;,,;,/,„„). 
 
 Part C-II: I lilMAInDA A\l> Ci:<T()r>A. Py A. U. r„„ppr (/.watu /- W,r, .1 ;'.}n 
 
 Part I; TI l!l'.l.l.]..\klA. HvA. Il„.s,.|| In :.r,,,.n.,l„m\ 
 
 I'art .1: ^"l.^ 1 11 A 1 . 1 .\ i.-^upiilcine.Tarv". Rv I II. .Ashworth il -^ued Sei inn' rr i'l Ui"!,) 
 
 Part K: M.\l 1 li II M. Hy Hali.li V. 1 hanihcrlin . /„ ur- imranln) 
 
 Part .\I: 1 oUA.MI MIKUA. Hy .1. A. ( ■u.thinan {h»uii F,;ruarij 6, l^m)\ 
 
 VOLIME X: I'l-.lNkTOX, II YltKOCiKAPIIY, TIDES, ET*'. 
 
 Part (■ TII)AI. ( IH.-K ItVATIOX.s AND Ursri.T-. Hy W. Hell Dan-son, . h.mdOctuh.r I. !9»0). 
 
 von ME XI: GEULO(iV AM) (iEOdHtAPIFY 
 
 Part A: Till; (;i;ol.(l(.V Of Till: Ali( TIC ( OAsT (>l ( AXAUA Wl .-^T OF Till' KIXT 
 
 l'i:XlX.-ri.A. Hy .1. ,1. O'Neill fhsu.,1 J,j/h. i:h) 
 
 Part I!: MAI'S A.\U (.!.()(, U.VPIIKAI, XtrrKS. Uy Kenneth C. ( hipman ami .Ichn li. (ox 
 
 ihsui'l July a, iu!i). 
 
 VOLIME XU: THE COPPER E.SKI.MOS 
 
 Part A: TIIK I.IIT. OF THK COI'I'KU KSKIMO^. Hy n lei.nesa (/,«:,,,; J„f,„ar„ 11 IHSf) 
 
 Part 11: Tin: I'll VSK 'AI. ( IIA liA( TKKISTK S ol Till. WK.-iTKK.X AXD (-Ol'I'KU 
 
 !■..■" Kl Mo.-. Hv I). .lennesci f/.<..,i.d Mau IS l<ltn) 
 
 Part C. Tin: OSTKOl.DCV OV Till: WKS'lKliX AXI) CKNTUAL i:SKl.\IO>. ' 
 
 l)y Juhn Cameron l/s.iufj June M, tOlS). 
 
 VOLUME XIII: ESKIMO FOLK-LORE 
 
 Part A: ESKIMO MVTII- AXD THADITIoXS IT;OM ALASIC\, TIIK MACKKXZIK I)1IT\ 
 
 AXD ( Ol'.n.XATIoX CIl.l'. I',v l)..lerinesa IheuJAonmwi; r" ) 
 
 Part li. STIUXC; lU.LKKS OF Till. FHUMos. Hy D. Jcnnesa i/mu.,/ Augu^i 8. t'J!;). 
 
 von ME XIV: ESKIMO SO.VGS 
 
 PAF.T A: SOXdS OF Till; 1 om.li i;SKI\loS. 
 Hy Helen IT lioiiens rnd D. .Ienne.se.. 
 
 I^iu i 1). ri-'er s. I ■ 
 
 VOLIME XV: K.<iKIMO LAXOlAfiE AXD TEni.NOLOfJY 
 
 Part A: CO.MHAliATIVK r;i{AMMAlt AXI) VI M ■AIUT..\ I! V OF TIIK KSKIMO DIMF.T.S 
 OF I'OIXT liAUIlOU, TIIK MACKKXZli. UKI.TA. AXD tUHOXATIO.X ('.■'•CK 
 
 Hy I), .li'nnes.. l/„ „„,,., r,, „„)' 
 
 Part li: TECIIXOI.Oi; V UF TIIK (■01'!'j:i< KSKIMOS f Vu L ,'r. ;,.r, jji 
 
 i. f^ 
 
 VOLUME XTI: ARCHAEOLOGY 
 COXTUIHFTIOXS TO TIIK A liCHAKOUx; V OF WK.STi:HX A l{i Tic AMi:HICA. 
 \Ti:Im [in jjir,..). 
 
 (Indoi issued with last number ot eac^h vulume.) 
 
 I I 
 
REPORT 
 
 JT THE 
 
 I 
 
 CANADIAN ARCTIC EXPEDITION 
 
 1913-18 
 
 VOL. VII : CRLSTACEA 
 
 PART I: OSTRACODA 
 
 FRESHWATER OSTRACODA FROM CANADA AND ALASKA 
 
 By O. O. Sara 
 
 tDOUQlAS 
 
 LibKAuy 
 
 qu€€N's uNiveRSiiy 
 
 AT kiNQSCON 
 
 kiNGSTON ONTAKiO CANADA 
 
 OTTAWA 
 
 F. A. ACI.AN'D 
 
 PRINTER VO THE KINGS MOST EXCT.I.LENT MAJESTY 
 
 iMued July 38, 1926 
 
c i^-^c . r'l'^ 
 
 h 
 
 J 
 
 c -■ 
 
FRESHWATER OSTRACODA FROM CANADA AND ALASKA 
 
 Hy Prok. G. O. Saks, 
 
 /'// ' /'/, (hid \i>rir,i>i. 
 
 IXTUODLC l.)UV 
 
 The freshwater (Mracoda of North Amc.ica are. stili rather •nipcrfocUy 
 knuwn, the only fiiirly complete siooount bcinn that given l>y ('. II. riirncr in 
 the Synopsis of the Entomostraca of Minnesota, TmhliHlied in 180'). From ( 'tiniidfi 
 very few HiM-ries have a« yet been rceonleil, .iiul it will therefor'! l)e of interest 
 to have further knowledge ttf that part of the Fauna in the more i rfhern regions 
 of America. 
 
 The present arrount in based upon eolleetions made mainly by Mr. Frita 
 J"hanscn, and taken chiefly in the neighbourhood of t.ttuwa.' The collections 
 comprise sixteen species in all, tive of which aprear to be new tt> science, and 
 a 6tn {Cypria harhata, Forbes) constituting the type of a new genus. This nnd 
 the fivt new specits are figured on the five plates accompanying the present 
 acco int, and detailed descriptions of them are given in the text. 
 
 Family CYPRIDAE 
 Sub family CYPRINAE 
 
 Group NOTODROMIDEB 
 
 Genus Cyprois Zenclier 
 
 Remarks. — Of this well-defined genus, in the restriction now generally 
 accepted, only a single srecies is as yet known, viz., C. marginala (Strauss). 
 I am now enabled to add another nearly allied, but evidently distinvt species 
 from Canada. 
 
 1. Cyprois occidentalis, n. sp. 
 
 Plate I. 
 
 Specific Characters. — Female. Shell somewhat compressed, seen later- 
 ally (fig. 1), short oval or subquadrangular in shape, (ircatest height a little 
 behind the middle and about equal to J of the length, dorsal margin gently 
 arched in the middle; ventral margin very slightly sinuated, both extrei- .tics 
 obtusely rounded off, the anterior a little bnadtr than the posterior; seen 
 dorsally (fig. 2), narrow ovate in outline, with the greatest width behind the 
 middle and scarcely exceeding § of the length, anterior extremity gradually 
 narrowed to a sharp point, posterior more obtuse. Valves very thin and trans- 
 parent, witliout any obvious sculpturing, and provided at each extremity wit'o 
 a well niarketl hyaline rim crossed by fine curved striae, that of the anterior 
 extremity being in particular very broad and eonsj/icuous; hairy coating very 
 scarce. Structure of the several appendages (sec figs. 4-7, 10-12) on tl'o whole 
 very similar to that in tlie type species. 
 
 Male (fig. 3) of smaller size than female, and siightly diffpring in the shr.pe 
 of the shell, which is more compressed and, viewed later.illv higher '■» prnpur- 
 tion to the length, with the dorsal margin more arched; posterior extremity, as 
 
 * As only :hreeo( thesixteeD species list'id in thi< T^pvt w•T^ r^prf^^nt^ i in th, ArcU3 ooUe^tuMi*. an a.» iiy Mom s 
 neodwHor thtMncIiision erf tha lunte ma*i ol oxtn lirnital n]U>ri%I whi ;h >■» oit^i'i: of th» pr n tr parvi 'W (> ctio Arrtic 
 eipeditioo puMifTitioris. Thj l>^il Ottaw-i ^pjunin* w>r) ^m^ t» P- jf'*s>r S»r.^ with^ -t- pruT oxplanatiins hy ihe 
 collector, in his Z'-al for parly publicatio.i, ia'i_'p,nd8itly o( th> Arc'i) Pubii ^atiois Ginrnitt'-, an ' a« a c'lmpreheONive 
 reiiort waa prepared by Professor Sara including bath th J Arctic an J the s>tth>rn spjci'nani, it was thiusht b^t not to 
 bre«k up the report. 
 
 17553-14 
 
4 ('(uuidinn Arctic Expedition, 1!)13-1S 
 
 ill till" fi'iuiilc, ol.tusclv roumlcd off. Piclicnsilc i)!il|)s of iiiaxillipcds (figs. 8, *.)) 
 (lisstinctlv uiicciual. pn.iiudiis of tlio lolt pal]) (tin- '.'l with a deep sums about in 
 the initiaic, bouiidcil i)roxiinally l>y a rather i)roiuiiicnt Impnlonu cxpunsion; 
 dai'tyhis }i(>\vcvpr in both i)alps narrow and greatly curved. C'opuhitivo appeiid- 
 atjes'(fin. Ki) eoini)aiativelv smaller than in the tyi)e sjiecies and less strongly 
 eliitinized, differiiiM: also (oiispicuously in shape. Ejaeiilatory tubes (fiti. 14) 
 eomparatively sliort. 
 
 Colour not vet ascertained. 
 
 Lensth of adult female about 1 mm., tliat of male ()•'.)() mm. 
 
 Kkmauks. — The above described form is mKiuestioiiably specitically 
 different from C. mariiiniita. beiiiK of much smaller size and difTerinu cons|)icuous- 
 ly in the shape of the sliell, as seen laterally. Moreover well-marked ditTerences 
 a"ro found in the inehensile i)alps of the maxillipeds in tlie male, as also in the 
 copulative appenda>;es and the ejaculatory tubes. 
 
 OccxRRKXiB. — Two perfect si)ecimens only of this form, a female and a 
 male, were picked up from a trample taken by Mr. F. J.ihansen, in May, 1028, 
 from pools at IMUings bridjje, Ottawa, Out. In the same sample some detached 
 valves of quite youiin specimens were also found. 
 
 (Iroup ExcYi'niDEs 
 
 Genus Cypris (). Fr. Mueller (sens, strict.) 
 
 2. Cypris pubera O. Fr. :Mueller 
 
 OtciRUKxrE.— Of this large and easily recognizable Ostracod a considerable 
 
 number of specimens have been collected by Mr. F. Johansen. chiefly from 
 
 pools at IMUings bridge, Ottawa, Out., in the month of June. 11(21-28. 
 
 Genus Eucypris Vavra. 
 3. Eucypris crassa (0. Fr. Mueller) 
 OccuRRKNCE.— A few. somewhat damaged specimens of this peculiar si)ecies 
 were found in a sample taken by Mr. F. Johansen in May, 1028. from some 
 pools at Billings briilge, Ottawa, ' 'ut. 
 
 Genus Cypriconcha, new genus 
 
 Generic Characters. — Shell subcompres.sed, reniform in shape, and 
 scarcely at all flattened ventrally. Valves sub-equal, thin, and densely hairy, 
 with tlie edges unarmed; inner duplicatures broad, in particular behind. Anten- 
 nae comparativelv feeble, but apparentlv well adapted for swimming. Mandibles 
 strong, with the palp distinctly articulate and the vibratory plate well developed. 
 Maxillae witli the masticatorv lobes comparatively narrow, palji ratlicr pro- 
 duced and having t)ie <listal joint cylindric in shape. Prehensile jialps of maxil- 
 lipeds in male slightlv uiie<nial. both liaviiig a very consi)icuous thumb-like 
 jirocess issuing inside the propodus. Legs comparatively slender. Init of normal 
 structure. Caudal rami very much prolonged, with tlie dorsal edge finally 
 spinulose. Copulative appendages of male of moderate size and slightly lobular 
 beiiind. Kjaculatory tubes large, with numerous whorls of radiating spikes. 
 Spermatic vessels confined to tlie posterior part of the valves. 
 
 Remarks. — This new genus is established to include the remarkable form 
 described below and originallv recorded by Forbes as a species of the genus 
 Ciiprif!. It is, how( vcr. evideiitlv not a genuine r;//)//.t, in the sense now gener- 
 al'lv adopted, nor can it, as believed bv Turner, be referred to the genus Herpeto- 
 cypri^, as it differs essentially in the structure of tlie valves, and in the posterior 
 antennae being jirovided with distinctly de\eloi)ed, natatory setae. As it aho 
 otherwise exliibits some characteristic differences from the other genera included 
 
Ui<tiac()da 
 
 ^ 
 ^ 
 
 in tlie unmp Ennipridac. I have felt justified in icniinlnin il as tni' tyix' i)t a 
 particular sc'xis. for wliicli tlif ahovc name is proixisftl. The tcnuilc sex only 
 has hitherto been observed. Hy the examination of the male specimen de- 
 seribetl helow 1 have been still more confirmed in the generic disiinctness of tlie 
 present form. 
 
 4. Cypriconcha barbata (Forbes) 
 
 Plate II 
 
 Cinris hoihula Forbes, Hulletiii of tlie rMite<l States Fisii Commission 
 for IWtl, p. 2U. PI. XXXVII. nt;s. 2, :{. PI. XXXVIII. Washington, 1S»«. 
 
 JItri>ili> f7/»/-/.v boii.'ta Turner, Freshwater Ostraeoda of the I'nited States 
 (in ('. L. Herrick, Synopsis of tlie Kntomostraca of Minnesota, p. :?l(j, PI. 
 LXXVII, 1S(»-'), Second Report State Zoolocistj. 
 
 SpK.riFic CiiAKACTKHs. — M(tlr. Shell, seen lati rally ifitr. 1). obloiii:. uniform 
 in shape, ratlier lii^her behind than in front, (ireatest hei<:ht about e(nial to half 
 the li'iijith. dorsal margin almost straisiht in the middle and sloiunj: ratlier 
 steeply behind, more slowly in front, ventnd margin distinctly .siimated in front 
 of the" middle and consiiiciiously bowed in its posterior part; anterior extremity 
 somewhat defiexed and obtusely rounded at the end. )).isterior considerably 
 iiroader and ratlier obli(iiie, with the lower corner (piite evenly rounded off. 
 Seen dorsally (fin- 2), narrow oblong in outline, with the greatest width scarcely 
 exceeding Jof the lennth, side-edges nearly straight in the middle, both extrem- 
 ities i)ointe(l, the jxisterior more so than the anterior. Valves perfectly equal, 
 with the surface smooth, but all over clothed with rather coarse hairs, forming a 
 dense fringe around the anterior extremity; inner duplicatures remarkably 
 broad behind, and defined inwards by a sharply marked, curved line (x(r fig. D- 
 Anterior antennae (fig. 3) rather slender, with the terminal part almost twice as 
 long as the basal one and, as usual, composed of five joints, the first of winch 
 is about the length of the two succeeding ones combined; setae of this i)art 
 slender and elongated, forming together a dense, apical fascicle. Posterior 
 antennae (fig. -t) not nearlv so powerfully developed as in the genus ( ijpns. 
 with the peniiltinuite joint" much shorter than the preceding one and rather 
 narrow, sublinear in shape; natatory setae present in the usual number and 
 distinetlv ciliated, extending however not fully as far as the apical claws; the 
 latter di'stinctlv denticulated. Anterior lip [see fig. o) somewhat protuberant m 
 front. Mandiiiles (fig. «) well chitinizcd and coarsely dentate at the extremity; 
 palp of moderate size and rather densely setiferous, with the vibratory plate 
 comparativelv large and provided with six plumose setae, five on the trans- 
 versely truncated extremitv, and one rather smaller on the anterior edge. 
 Maxillae (fig. 7) witli the "spines of the outermost masticatory lobe sniooth; 
 palp considerablv produced bevoiid this lobe; vibratory plate large, semilunar 
 in shape. Maxillipeds (fig. 8) transformed in the usual manner, the palp being 
 developed to a powerful, grasping organ, that on the right side somewhat larger 
 than that on the left (fig. '.>). and having the thumb like process of the propodus 
 considerablv more prominent; dactylus moreover exhibiting at the base a well- 
 marked, tridentate. lamellar exi)ansioii, only faintly indicated on the left palp. 
 Anterior legs (fig. U)) considerablv more slender than in the genus Ciipris with the 
 terminal part distinetlv four-articulate. Posterior legs (fig. 1 1 ) still more slender, 
 with the apical joint knob-like and armed with a scmiewliat hamate spine and a 
 recurved seta isrc fig. 12). Caudal rami (fig. 115) exceedingly long and slender 
 almost attaining half the lenglli of the shell, and somewhat Hexuous. dorsal 
 edge with about eight succeeding combs of spinules. apical chn\> (ac.'ordmg to 
 Forbes) contained about two aiul a half times in the length ot t.he ramus. 
 
 •Tliosu claws w.To l.rdkcn ofT in tlic s|,p,/iii»'n fvaiiiineil I>y mo; tlioy arc, Ik.wovc.', ii.I.lo.l 
 figuK- from tlw dniwir.g givrr, liy Knr!ii-r. 
 
 the 
 
6 
 
 Canadian Arctic Expedition, 1913-18 
 
 Seta of tho dorsal eiliro vory small and attaclicd noar ttin apex, f'optilative 
 appondancs (fi(t- 1^) <>t)loii}i oval iti shapo and <livi(U'd hohind inti) two obtusely 
 rounded lapi)ets. Kjaculatory tubes (fiji. 1.")) very larsie and each enclosed 
 within a roomy, muscular s'.ieath; botli extremities funnel-shaped. 
 
 Colour, according to Forbes, a dirty yellowish-brown, with a reddish-brown 
 patch on either sitle. 
 
 Length of the s])ccimen examined 3 •40 mm. 
 
 Remarks. — Tliis larpe and handsome ostraeod has hitlierto only been 
 observed by Prof. S. A. Forbes, who in the above-quoted i)aper has given a 
 rather full description of the female aecojni)aMied by some figures. The descrip- 
 tion, which has been reproduced in cxteiifso in Mr. Turner's monograph, agrees 
 on the whole pretty well with that here given; though, because the specimen 
 examined by me was of a different sex, some differences in the shape of the 
 shell, as seen laterally, are found, in addition to the sexual transformation of the 
 maxiUipeds. Forbes gives the length of the shell to 4 mm. and supposes it to 
 be the largest freshwater ostracod known. It is, however, in this respect con- 
 siderably surjiassed by some of the South African forms recorded by the present 
 author, particularly by the big species of the genus Mcgalocypris. 
 
 Occurrence. — The above described solitary specimen was taken by Mr. 
 A. G. Huntsman on June 11, 1920, in sloughs, three miles northeast of Medicine 
 Hat, Alberta. Forbes obtained the species from the Yellowstone river, Yellow- 
 stone Park, Wyoming (1893, Prehni. Rep. Aquat. Invert. Fauna). 
 
 Genus Cypricercus G. 0. Sars 
 
 5. Cypricercus aflinis (Fischer) 
 
 Occurrence. — Several specimens of this form have been collected by F. 
 Johansen. They were taken at the two following locaUties. 
 Pools at Billings bridge, Otiawa, Out., May, 1923. 
 Brackish pond at Teller, Port Clarence, Alaska, Aug. 3, 1913, C.A.E.* 
 
 6. Cypricercus horridus, n. sp. 
 
 Plate III, figs. 1-7. 
 
 Specific Characters. — Female. Shell ver\' tumid, seen laterally (fig. 1), 
 rather regularly oval or elliptical in shape, greatest height nearly in the middle 
 and somewhat exceeding half the length, dorsal margin gently arched, with the 
 greatest curvature in the ocular region, and joining the hind-edge without any 
 angular V)end, ventral margin slightly sinuated in the middle and somewhat 
 bowed in front, both extremities evenly rounded off, the anterior one consider- 
 ably broader than the posterior — seen dorsally (fig. 2), broadly oval in outline, 
 with the greatest width attaining about f of the length, both extremities some- 
 what blunted, the posterior more so than the anterior. Valves, as in the other 
 species of this i;enus pronouncedly unequal, the left one considerably ovcrlap])ing 
 the right in front, as also soniewhat behind; surface very uneven, being every- 
 where thickly covered with short and stout, sojnewhat squamiform spikes 
 curving as a rule, backwards, and giving the shell a very scabrous apjjearance; 
 a rather dense coating of fine hairs may also be observed. Structure of the 
 several limbs (see figs. 3-0) on the whole agreeing closely with that in the other 
 known species. Caudal rami (fig. 7) exhibiting the ajipearance characteristic of 
 the genus, being much in-oduced, narrow linear in shape atid perfectly straight, 
 distal apical claw not attaining half the length of the ramus. 
 
 Colour not yet ascertained. 
 
 Length of adult female! 1 Oo mm. 
 
 Male unknown. 
 
 *oee pp. 3-4 in I'art X, uf litis viduirie. 
 
Oslracoda 7 
 
 Remarks. — The above dpscrihod form is unquestionably referable to the 
 genus C^ipriccrms, as defined by the present author in his most recent |)ubliea- 
 I tion (Account of the Crustacea' of Norway, \ol. IX, RcrRcn, 1925, p. 117). It 
 
 I is. however, well distinguished from any of the other known species by the very 
 
 pronouncedly scabrous surface of the shell, this character having indeed given 
 rise to the specific name i)roposed. In the structure of the several appendages 
 I have not found any essential difference from that in the other species. Yet, 
 for comparison, figures of some of the limbs have been given on the accompany- 
 ing plate. 
 
 OccT'RRENCE. — 'i'hree female specimens only of this easily recognizable 
 form have come to my notice. They were found in two samples taken by Mr. 
 Fr. Johansen at the two following localities:— 
 
 Rideau canal, Ottawa, Out., June 9, l'J18 (1 specunen). 
 
 Pools at Billings bridge, Ottawa, Ont., June IG, l'.)23 (2 specimens). 
 
 I 7. Heterocypris incongruens (Raiudohr) 
 
 I Occurrence. — This seems to be the commonest ostracod occurring in 
 
 Canada, as a rather considerable number of specimens have been collected by 
 Mr. F. Johansen from several places. The localities are as follows: — 
 
 Pools at Aylmer road (near Deschcnes), Que., May 15, 1921 (numerous 
 
 : specimens). . ■ ,^ n. .. 
 
 I Pond on the pasture at Graham Bay station, Britannia, Ottawa, Ont., 
 
 I Mav 28, 1922 (several specimens). 
 I ■ Rock-pools at Cape Gasp6, Que., Aug. 12, 1922 (numerous young specimens 
 
 I and detached valves). ,r „ ,^<,o / i 
 
 I Shallow pond at Chelsea road. Quo., near Ottawa, May 2, 1922 (several 
 
 i specimens). 
 
 ; Pools along the road (gra.s.sy clay at the bottom), Port au Port, west coast 
 
 i of Newfoundland, September 2, 1922 (numerous specimens). 
 
 (Genus Prionocypris Bray and Norman 
 8. Prionocypris canadensis, n. sp. 
 Plate III, ii--. 8-lG. 
 SvECiFic Char.'VCTEH.— /-Vma/e. Shell .somewhat compressed, see laterally 
 (fig. 8) oblong trigonal in shape, greatest height in front of the middl.- 
 and not fullv attaining half the length, dorsal margin gibbously arched at some 
 distance behind the ocular region, and slo])iiig nearly at a straight course to 
 each extremity, ventral margin distinctly sinuated in the middle, anterior 
 extremity broadlv rounded, posterior much narrower and obliquely produced, 
 terminating below in an obtuse corner; see dorsally (tig. 9), narrow oblong in 
 outUne, with the greatest width about equal to two-fifths of tlie length, both 
 extremities pointed and nearlv equal. Valves subequal and rather thin, semi- 
 pellucid, with the edges unarmed, surface smooth anf' only sparih^ly hairy. 
 Anterior antennae (fig. H)) with the terminal part scarcely longer than t .e 
 i)asal one, first joint about the length of the ' -ao succeeding ones combined, 
 setae rather elongated. Posterior antennae (fig. 11) with the first joint of the 
 terminal part moderatelv dilated and slightly longer thai', the other two com- 
 bined; natatorv setae reduced to very small rudiments (sr,' hg. 12) Oral 
 parts and legs '(figs. 13-15) of quite -lormal structure. Caudal rami ("g- K') 
 rather powerfully developed and perfectly straight, linear in rhape; distal 
 apical claw scarcely attaining half the length of the ramus, dorsal seta small 
 ; and attached near the apex. 
 
 i Colour not yet ascertained. 
 
 # Length of adult female 1 -40 mm. 
 
 H Male unknown. 
 
8 
 
 Canadian Arctic Expedition, 1913-18 
 
 Remarks. — The quite rudimontan- condition of the natatory setae on the 
 posterior antennae proves this form to be referable to the fienus I'rionocijprin, 
 as recently defined by the present author. In tliis respect it certainly agrees also 
 with the genus Herpetocypris; but it cannot by any means be referred to that 
 genus, because the structure of the valves is wlioUy different and agrees closely 
 with that found in the other species of the present genus. From thesis it differs 
 conspicuously in the shape of the shell. 
 
 Occurrence. — Two female s|)ecimens of this form were found in a sample 
 taken bv Mr. J. H. Tvrrell from a small brook in the fooiliills, tributars* to 
 Middle "fork, Old Man "river, Alberta, August 1.'), 1883. 
 
 tlroui) ('YrRinopsiDEs 
 
 Gemis Cypridopsis IJraily 
 
 9. Cypridopsis aculeata (Costa) 
 
 OcciRRENCE. — Some few sju'cimens of this form were raised from a parcel 
 of dried mud kindly sent to mo from Mr. F. JuhanM'n, and taken V)y him from 
 a pool near Ottawa. 
 
 (lenus Pionocypris Braily and Norman 
 
 10. Pionocypris vidua (O. F. Mueller j 
 
 Occurrence. — This form was raised nither aljundantly from the same 
 parcel of nuid as the abovi^ named Ciipridopsiii. Four specimens were moreover 
 picked up from a sample taken by Mr. F. .Johansen on June '.), 1918, from the 
 llideau canal, Ottawa, Out. 
 
 11. Pionocypris helvetica (Kaufmann) 
 
 Occurrence. — liaised in my aquaria together with the preceding sptu'ies. 
 Also found in a sample taken by Mr. F. Johansen from a i)ool in fields on 
 beaver meadow, (^ue., near Ottawa, on May 26, 1918. 
 
 Group Cycloclyprides 
 
 Genus Cyclocypris Brady and Norman 
 
 12. Cyclocypris globosa Ci. O. Sars 
 
 Occurrence. — Some few s])ecimens, apparently belonging to this species, 
 were found in a sample of lake Plankton, 0-20 fathoms, three vertical hauls 
 with net No. 4, through hole in ice, June 12, 1916, at Bernard harbour, Dolphin 
 and Union strait, N.W.T.* 
 
 Genus Cypria Zencker 
 13. Cypria lacustris (i. O. Sars 
 Occurrence. — Found oc sitjually in tlie same sample as the Cijclocypria. 
 
 •up (■.WDOXIDES 
 
 Genus Candona Baird 
 14. Candona subgibba, n. sp. 
 
 Plate IV, figs. 1-9. 
 
 Specific Charactkus. — Fnnnli'. Sliell rather compressed, seen laterally 
 (fig. 1) of a somewliat irregular oblong sha))e. greatest height scarcely attaining 
 half the length; dorsal margin consitlerably arched, foiining Ix'hind the middle 
 
 "Vet" p. 10 in Part X, of lliis volume. 
 
Oslraccxin 
 
 9 
 
 an iilirupt, iilmoMt nibbnus bend !Uh1 slopiiic litthcr stcci)ly bcliiiul, more sic.wly 
 in front; vcntnil muririn distinctly siiiuntcd in front of the middle and ciirvfd 
 evenly upwards beliind; botli extniuities obtusely rounded off. the anterior 
 rather broader thai; the jjosterior, which aiipears soniewlni* produceil behind; 
 Keen dorsally (fi(j. 2) tlie sliell is narrow fusi-forni or lancet-shaped, with the 
 greatest width scarcely attaining one-third of the length; both extremities 
 eipially contracted and i)ointed at the end. Valves rather thin, semii)ellui iij, 
 and ahuost bare of hairs. .Vnterior antennae (tit. :ii comparatively slender, 
 with the terminal part consiiierably lontji'r tlian the bastd one and all live joints 
 of about same lenptli; setae of this part rather slender and eloncated. Posterior 
 antennae (fi(J. 4) with the terminal i>art scarcely longer than the hasal one. and. 
 as in tiie other sju-cies of this (lenus. without any trace of natatory setae. Oral 
 parts (fijjs. ."), (i) of the usind structure, .\nterior lei:s (fie. 7) (-omparanvely 
 sleinler and elonnated, with the first ioint of the terminal part fully as lonu as 
 the other three combined. I'osterioi lejcs liij:. S) with the penultimate joint 
 distinctlv subdivided, terminal ioii.. small but havini; all the three apical setae 
 well developed. Caudal rami i.sm fin. (I) evenly curved and nuicli atti'iuiated, 
 with t)ie apii'al claws ratlier slender and c<insideralily exceed intc half the 1( n^.h 
 of tlie ratmis; dorsal seta well develo|>e(l ami rather icinote from the aiiex. 
 Cienital lobes (iliil) umis\ially larjie, and each scndiiid (,ff l)ehind a peculiar, 
 somewhat sceuri iorm lap])et. 
 
 ('( lour not yet ascertaine<l. 
 
 Length of adult female 1 ^l.) mm. 
 
 Male. — Unknown. 
 
 Rkm.\UKs. — In tlie neiieral outward api>earance this term bears some 
 resemblance to the species of the tienus Cnjptociiiiiliiiiit Kaufmann. It is, how- 
 ever, a true Cauilomi, as proved by the structure of the several ai)pendanes, and 
 mav easily, bo distinguished from most other species of that v'enus by the uiii- 
 boilsly vaulted dorsal face of the shell. The peculiar shape of the (genital lobes 
 is one of the most distinctive chara<'ters of the present siiecie--. 
 
 ()c(URK?:nck. — A solitary fully adult female sn(>cimen of this species was 
 found in a sample taken by IMv. F. .lohansen on Auti. '.i. WWi, from a bracki;!' 
 pond at Teller Port Clarence, Alaska.* Another specimen, exactly aKreeing 
 with the one here described hail been previously i)icked out from a sample of 
 dried mud kindly forwarded to me from Prof. Ishikawa, ami taken from a pond 
 near Tokyo, Japan. 
 
 1."). Candona panula, n. sp. 
 Plate IV, figs. 10-1 o. 
 Sfecific Ch.mi.\( tkus. — Fiinah. Shell less com|)re.ssed than in the ])re- 
 reding species; seen laterally (tig. ID) rather regularly oblong oval in shape and 
 nearly etiually liigli throughout, witli the height about half the length; oorsal 
 margin almost straight and horizontal in the middle and sloping somewhat 
 more steeply behind than in front; ventral margin slightly sinuateil; both 
 extremities obtusely rounded, the i)osterior a little broader tlian the anterior; 
 seen dorsallv (fig. 11), regularly oblong in outline, with tiie greatest width some- 
 what less than the height; anterior extremity obtusely i)ointed, posterior a 
 little broader and more hlunled. Valves only slightly iiellucid, with the surface 
 smooth and of a pearly lust .'\nt( nnac and legs (figs. 12-11) comparatively 
 shorter and more rolni'-t th.'in .n the preceding si)ecies. Posterior legs (fig. It) 
 with the iienuUimate joint n.it sulNliviued; shortest ajiical seta very small and 
 hamiform, curvid at the tip. C.io.ial r.imi (fig. lo) only sliglitly curved and 
 much less attenuat. han in ('. .<,ih,i,liiiii; apical claws rather shorter not attain- 
 ing half the length oi the ranuis. Cinital lobes (Wnd) simple, rounded off ' ejiiml. 
 
 •S- I "4 in part X, of this voiuMie. 
 
 it? 
 
10 Canadian Arctic Expedilion, 1913-lS 
 
 ('olour, opiupie wliitish. 
 
 Lcnuth (tf shell scarcely exitiiling O-oti mm. 
 
 Male. — Unknown. 
 
 Rkmakks. — Tliis is a very smr.ll si)crics and could easily ho taken for nnl 
 the yoiHid of sonu( larticr form I have, however, found all tlie a()pendanes we 
 dcveloj)ed, and, thoucli no ripe ova were observed in the l)ody cavity, 1 bclic\ 
 that the specimens had arrive<l at their full size. 
 
 Occi'KUKNcK. — Several specimens of tliis small ostracod. all of about tli 
 same size, were jiicked up from a samjjle taken by Mr. Fr. Johanst;n, May 'Jt 
 1918, from a jiool on fields in beaver meadow, Que., near Ottawa. 
 
 Family CYTHERIDAE 
 
 Genus Cytherites, new nt'nus 
 
 Gknekic Ch.mi.\ctkks.— Shell sliort, scale-like, and much compresset 
 with the valves perfectly equal and quite uuanned; surface smootli witlioi 
 any obvious sculpture. Antennae rather strong and built on the »isual Cythei 
 idean type. Mandibles with all the parts well developed. Maxillae, howcve 
 without any distinctly defined masticatory lobes. Legs very peculiar, all prt 
 nouncedly prehensile, terminating in a subcheliform hand. 
 
 Remarks. — The present new genus, the cliief characters of which ai 
 given above, is in particular higldy (listinguished by the remarkable structure i 
 the legs, which is unlike that found in any other Cytherid known to me, an 
 points to quite peculiar habits of tlie animal. The general sliape of the she 
 differs also conspicuously from that usually met with in Cytheridae and look 
 more similar to that in some of the Cypridac, for instance in the species of tli 
 genus Cypria. After all, tins genus differs so essentially from tlie other know 
 Cytherida, that it should more properly be regarded as the type of a particuU 
 subfamily. 
 
 10. Cytherites insignipes, n. sp. 
 Plate V 
 
 Specific Characters. — Female. Shell, seen laterally (fig. 1), of a shoi 
 rounded oval shape, with all the edges smoothly curved, greatest height somi 
 what behind the middle and attaining almost two-thirds of tlie length; dorsi 
 margin boldly arched and sloping more steeply behind than in front; ventri 
 margin scarcely at all sinuated; anterior somewhat oblique; posterior muc 
 broader and obtusely blunted, with the lower corner evenly rounded off; see 
 dorsally (fig. 2) the shell is verj' narrow lanceolate in outline, with the greatei 
 width not nearly attaining o- 3-third of the length; anterior e.vtremity sonicwhf 
 more pointed tiia" the posterior. Valves very thin, with tlie surface perfect! 
 smooth and almi bare of hairs, inner duplicatures apparently very narrov 
 eyes not observei. Anterior antcmiae (fig. 4) moderately strong, with the tw 
 joints of the basal part shmply defined and forming with each other an angult 
 bend; terminal part almost twice as long as the basal one, and composed ( 
 five joints not much different in length and clothed with comparatively shor 
 simple setae; last joint very narrow, with three apical setae. Posterior antenuE 
 (fig. .S) ratlicr stout, witli the penultimate joint distinctly subdivideil in tk 
 middle; last joint armed with two unequal claws, the posterior one being muc 
 the stronger and coarsely pectinate inside; flagellum well developed, extendiii 
 almost to the extremity of the antenna. Ante-ior lip (see fig. 6) only slightl 
 bowed in front; posterior lip, as usual, strengthened i)y two securiform an 
 highly chitinised pieces (fig. 7). Mandibles (fig. 8) comparatively slende 
 but well chitinised, with the extremity coarsely dentate; outermost toot 
 
Odracoda 
 
 11 
 
 lamellar and ^riiinoil with fine spiniilos i!<ee fiif. 0); palp rather narrow and only 
 sparingly setiferous, hut armed on the tip with a coarse, claw-like spines; vibra- 
 tory plate small and edijod with three or four blender setae. Maxillae (fiti. 10) 
 provided at the hase with a weli-developcMl, semilunar, vibratory plate; palp 
 very much produced with the proximal joint narrow-fusiform in shape; distal 
 joint short and armetl on tlu tip v.ith two sulie<iual, clawlike spine (sec h(j. 11). 
 Legs (fin- 1'-) comparatively short and robust, only slightly increasing in length 
 posteriorly, with the basal part almost bare; first joint of the tcniiinal part 
 rather naVrow and of somewhat different length on tlu; several legs; the two 
 outer joints in ail of these firmly coimected, to form a somewhat dilated hainl, 
 against which the strongly curved, nail-shaped ajiii'al claw or dactylus is seen 
 to impinge, the latter issuing with a broad compressed base and terTiiinating in 
 a sharp, upturned point, being moreover armed inside with five long an.l slender, 
 likewise upturned spinules (.sec tig. 13). Caudal lamellae (comp. fig. 3j much 
 reduced, but not clearly made out. 
 
 Colour not yet ascertained. 
 
 Length of adult female 0-4.") mm. 
 
 Male. — Unknown. 
 
 Remarks. — The above-described remarkable ostracod is easily distinguished 
 from any of the hitherto recorded Cytheridae, both as to the general shape of 
 the shell and to the stnicture of the several appendages, in partitnilar that of 
 the legs. It is one of the smallest known forms, and indeed the anatomical 
 examination has therefore been attended with no small difficulties. 
 
 Occurrence. — Three specimens of this interesting form were among the 
 Ostraeoda sent to me by Mr. F. Johansen. They were contained in a separate 
 little tube labelled "Cythcre, Canada." the exact locality, date and collector 
 not being known. (Old museiim specimen, perhaps collected by J. B. Tyrrell.) 
 
 M 
 
12 
 
 Canadian Arctic Expedition, t9l.i-tS 
 
 LIST OF l.ITT.HATnU'. KKCOUDIXd UKCKNT FKKSHWATKU 
 OSTUACODA niOM CANADA AND ALASKA 
 
 i(\nnf)iUd bij Frits Johansiii, Ottawa) 
 
 Al>AM.-TONf„ r. H.. mid Hakkxkss, W, J. K., W2'i: 1'\u> BtittDiii ( (runiiiNtiis of I.nkc Nipinoii 
 it'iiiv. 'I'ci until Si iiclirs, liliil. Sir , Nip. '22. Ton mid, pi) I'.'l-Td). liiciirdHllicoicnrrcncn 
 iif ostrmiiilf in I'ottiini nf l.iikc Nipiitmi. Ont., in lli'.'l, «u pp. IJ.'i, 1J7, It.', LVhW, 
 laVtiti, !t)S-7(). 
 
 Aii.wiMONK, F. U., l!f.M: Tlir Hiitli>ni-f;iiiM:i nf l.iikr Nipiiiim .iliiil , No. 2\, pp. C'.-TO). I.. ri>rd.s 
 OHtriicods a.s fmind in Lake Nipiirnn. Dnt.. in l".r_''.', on pp. 4tv-.'il .Vi-.jT, ti"). 
 
 Distrilmtiim and rrnnoinir iMipiiTlancr of tlic linttoin-faiina of Laki' Nipiit'm liliid , No. '_'•", 
 pp. Ii:!-I(HI'. Wrrord.s ostiaciid.s iChiiiIuhii hp.. I.imnt«ijllii n- sp,, I'tr.: scr partiridarly 
 p, .'iji a.s oriiiriinif at linttoni and in (Isli-stoniarhii in Ijikc Nipinon, Ont.. l!»Jl-2;t, on 
 pp. 1(1-47, .'il-")'.', ti.Vlili, 7(1, 7t>, 7S-71I. 
 
 Ai-M, (!.. tUlt: HcilraKr znr KrnntnisH drr iiordliihcn und aiktiwlion OHtraciKlcnfiiuna 
 .\ikiv fur ZiMiliimi. Stiiikliolni, \ol. I.\, No. :,, JO pp. I pl.iti". HitomIs. on p. 4, 
 Eui-iiiirif itffiiiis liirxulti I'isrh., from Topsail, ssoutli I'lid of ( 'oiirrption liav, rant roast 
 of Ni'wfonnillaiKl, roll.'itid l>y l.iiidald on Aiinnst 'Jl, 1S71 (one fcnialci; and, from 
 (Irantlcy liarlionr, I'ort Clarcncr, Ala-ska, colli-itid hy tlir Swedish "VcKa" Kxprdilion, 
 oil .filly j;i, lS7'.t. .\lso. on p. 7, (';///ni/y/)»/.'< liiliin (). 1'. Miicll. (fcmalci and (',v/<nVi 
 iisniljitn ri.srh. (nialo and fcmalri arc recorded from Topsjiil, Newfouiulland. 
 
 B.\XT H, ,f. M<<i.. 1!M);{: Mieriweopic forms in fresliwaler il'mc. Nat. Hist, .\ssoe. Miram., No. 
 Ill, Chatham, pp. u-10). Mentions, on p. 7, cviirid.. us foimd in pond.s near Chatham, 
 N.H. 
 
 IWIo; Fr'>8liwater-life (ihid., No. IV, pp. I'.'-lSi. Mentions, on pp. 14, 17-lS, cyprid.s as 
 observed in freshwater from Chatham, N.U. 
 
 BioEi.ow. X. K., 1923: The Plankton of Lake Nipiiiou and environs (Vniv. Toronto Stud., 
 Biol. .Ser., No. 22, Toronto, pp. lilMiti). I{eeords, on pp. oiMK), ('mirin sp . ('iin<litnii s])., 
 Siiir<n-iii>ris tulitnidiiln Sharpe. I.imiiinnlhirv riliiiiUita Shaipi', llli/inlroiiiiis iiecliiMilus 
 Sharpe, from Lake Nipi^on, Ont., eollected in 1921. 
 
 1924: The food of yoimK snekers in Lake Nipi(5on (ibid., No. 24, pi>. Sl-llU). lieeords 
 ostracods a.s found in the .stoniiicb.s of Cnltislomus commrrnoiiii in Lake Nipigon in 
 1921-22, on i)p. S)i-91, 93-94, 9()-ltX), 104-0.">, 109. 
 
 Clemens, ^\'. A,, and Bigei-ow, \. K., 1922: The food of Ci-seoes (Lcurichlhya) in Lake Erie 
 (ibid.. No. 20, pp. 39-o4). Records, on p. .■)1, ostrarods as found in the atomaeh of L. 
 hiirenyus in (ieorgian bay, Ont. 
 
 (Thi.s article is reprinted in ('ontrib. Canad. Biol, for 1921, Toronto, '22, pp. 87-101; 
 ostracods mentioned on p. 99.) 
 
 Ci.EMEXs, \V. A., Uymoni), .T. ]{., BioKi-ow. X. K., and Adamstone, F. B., 1923: Tlie fiwid of 
 Lake Nipipon tislies (ibid.. No. 22, pp. 171-^S). Records, on pp. 175-!Sl, ls;i-84, ostra- 
 cods (Ciii>ri(i sp. and Comlutiti sp.i found in fish stomachs from Lake Nipipm, Ont., in 
 1921, 
 
 Clemens, \V. A., Dymond, ,T. U., and Bioei.ow, N. K., 1924: Food-studies of Lake Nipigon 
 fiilira (ii)id.. No. 2.">. jip. lOl-Otii. Hiiord ostracods as occurrinp in the stomachs of 
 fishes from Lake Nipisjon, Ont., in 1921-23, on pp. 10.")-11, 114-20, 120-28, 133-35, 
 137-4(>, 1.".7, 101-02. 
 
 CrsiiMAN, .1. A.. 190S; Freshwater Crustacea from T.abradoi- find Newfoundland (I'roc. ^.S.N.^L 
 \'ol. 33, pp. 70.")-13, Plates LVIII-LXII. Washington l. Describes, on p. 7(X> and Plate 
 lAIlI, (it!s. 1-10, //i'i'/«7()cvy/ri.s lisliiiliiiiii In n. sp. from a pond on Funk isk .u. north 
 end of Newfoundland (about 30 miiis oil the Labrador roust i, collected by O. Bryant 
 in May, 19(«). 
 
 FoERsTEii, R. K., 192."): Studies in the ecology of the Sockeyo Salmon i( 'ontrib. Canad. Biologj-, 
 New- Ser., \'ol. 11, pp. 33.5-422, Toronto,!. Mentions, on Table 13, and on pp. 40.')-()t> 
 
 ttif liiidiiijj "f o-^tr.irr.ir. in the =trtmn.-)i? i.f y'"mg ^.'r,-.-,-;.-,';yi,.-/.:;.-- t;<ri-(! from CiiUiiK :ind 
 Hicks lakes on the lower Fra.ser river, B.C., in the spring of 1923. 
 
Onlmcoiln 
 
 13 
 
 i>rd8 
 
 IlrsTSMAN, A. (1., V.H'.i: InvrrlrlniitcK dtlirr tliaii iiiwcts mthI iiiipIIiiw* i\.it. Hint. Tuiniitu 
 Urtfinn, Tnrniifd, pp. 'JV'J-sTI. Mriitinim, <in p. JT"), NuIidI.-uhi '.x rccoril nf CnjiriM sp. •.', 
 from I,iiki' (hiluriii, iii'iir Tiinmli). 
 I'.I'JJ: Tlio iiniW I-akc!" <if Siuikatrlicwim iinil tlit-ir fi.-.iirr\ pnwiilnlitHH .(cintril) Ciiinil. 
 
 iiiiil., Niw Sit,, \"I. 1, Tfiroiit". pp. IJ.Vlli. Hi-curil!*, uti p. l:ii, (isini l-i tl.inn„>- 
 
 nilhiri- riliniliiln, otr.i, from Quill lakes m Siisk. ilat. .VJ (l.'|£ri-.r, N , Ihmk. KII ijiurii'!! 
 \\'.i, colU'i-twl by liiiii and I'rof. .\. WillfV in the spriiiK nf I'.tJO. 
 
 Jon\NstN, Frits, llf.'l: liim-ct I.ifo nii tbi' witiliTii antic coast of America (Ucp. Can. Arct- 
 KxiK.<l. I'.t|;»-1H, Vol. Ill, Tart K. Ottawa, p. llti. 
 \<r2'i: T.iipliyllopodCriiRtacca of ttit- American An'tic iiliid.. Vol. \II, I'art d, p. :ii. 
 
 I'.IJ'J: The Cnistaieaii life of some arctic laRiMnis, lakes aiiil p Is iiliiil.. \ol VII, I'art \, 
 
 pp. 1, lt>'. Freshwater ostracods olwerviil in .\laskaii and Wistern ('an.idiaii .\rctij 
 mentioned in these three paiMTs. 
 1921: 'I'he larner freshwalir Crustacea from Canada and .Vlaska iCanad. Field- Vatnr., 
 
 " Ottawa, \ol. :i,"), PI). Hit, ifj). 
 I'.fJ.I: Additional Noti's on Fiiphyllopud Crustaceans (ibid., Vol. HT, p. '.'i. 
 l".t'J4: Further Notes on Canailian Kuphyllopods liliid , Vol. ;{S, pi>. 1, J, 7i. 
 
 In >liese three artiih-s the oicurretice i HIJl-.'Hi of oslracods m pimils around 
 Ottawa, Ont., is mentioned; and ■•mussel-shrimps" is proposed as the [wipular Knitlish 
 naiiif for thetM- Crustacea. 
 
 Ki.foii, A. D., 19'Jl: XotcH on Canadian F;nlomostrai'a (ihid., Vol. .%"), pp. 7J-7.'ii. IJecords, on 
 p. 7;j, I'yin-iilnimii niliui O. F. MucU., Cijttiuifiins liuria O. F. Nl., and ('ni'ns ,1, nlittit 
 Shariw, frimi near Kingston, Ont.; and ('!iiiri.-< Ifxluiliniiriii .-shariM-, from .\ylmer West, 
 Klgiii county uiorth shore of Lake Krie), colle<teil liy himself and If. C. White. 
 192."?: A new Ci/r/ori/;)n» from eiislern Canada (Trans. Hoy. Can. Inst., Toronto. \ol. XIV, 
 pp. '.V.\~-A'l. Plate XXVU). Describes <'. cnnUiviit n. sp. from freshwater p<M>ls near St. 
 Andrews, X. H., collectetl by hitn.self in .fune, lil'Jl (to(tether with Ci/yini/o/ws viiUui, 
 Cyirris niiciiliilii, Cinutond I'mrdliHn, (' jiilmii /m 8 liitrim and in Chamcook lake (near 
 St. AndroWH), X.U., collectetl by luM'.scif in 19J2 (p. :{;t7). 
 
 XiniOLKOV, H. A., 1S72: rreliminarv lte))ort on dredftings in Lake Ontario in 1.H72 CAnnal.s and 
 Manazine of Xatural Historv, Fondon, 4th Ser., \ol. X, pp. 27t>-H,-i i . Practically the 
 same article as in Canad. Journal, Toronto, Vol. XIII; ostrueods mentioned on pp. 
 27S, 281. 
 1,H7;}: Contrib. Fauna Canad. (( anad. .Journal, New .Ser., Toronto. Vol. XIII, pp. 49O-,')06). 
 Mentions, on pp. 49;i, oOl, ('yprin sp. ? as eonnutm in muddy bottom of Jjikc Ontario, 
 at 10-l.j fathoms. 
 
 .Sars, G. O., 191.5: Kntomostracn of Geornian Bay (Coi-trib. Canad. Biol, for 191 1-1 4, II, Ottawa, 
 pp. 221-22). Upcords on p. 222, Cycloriiyriis Kirenii Koch, from (he Biolog. Station at 
 Go Home bay, Georgian bay, Ont. (Fake Huron), collected by E. M. Walker in the 
 summer of 1907. 
 1925: An Account of the Crustacea of Xorway, Vol. IX, O.^tracoda, Bergen (in publication). 
 Mentions, on p. i:i7, the collecting of I'ionocyiiria liilnliai Kaufm. at Ottawa, Ont., 
 by F. Johansen. (Sie this C. A. E. report.) 
 
 8nAnrE, R. W., 191.S: Ostracoda (Ward .ind Whip|)les Freshwater-Biology, New York, pp. 
 790S27). Mentions, on p. Slli, the occurrence of I iriifloiyi>ria Irstudimiria Cushnian 
 in ponds on Newfoundland. 
 
 \\iLLEV, k., 1923: Xoti'S on the distribution of free-living Coi)epoda in Canadian waters (Contrib. 
 Canad. Biol., New Ser., Vol. 1, Toronto, pp. 'MUM. ill.K Records, on pj). :i()."), :U1-12, 
 two species of Ostracoda {('(iitdonn jKirnlilln and Cyjirni Diihllmlinlon from S' ' na- 
 cadie river, at the head of Mina.s basin, on the west side of Nova Scotia, coUec .\. 
 
 H. Leim in July-.Vugu.st, 1919 and 1921). 
 
14 
 
 Canadian Arctic Expedition, 1913-18 
 
 EXPLANAT OF THE PLATES 
 
 PlHtc I. 
 
 Cyproii oecidentalii G. O. Sara n. »p. 
 
 Fig- 1- Adult femnle, viewed from left iide. 
 
 yig. 2. Same, dorsal view. 
 
 Fig. 3. Adult male, «een from right tide. 
 
 Fig. 4. Anterior antenna. 
 
 Fig. 8. Poiterior a. . 3pn«. 
 
 Fig. 8. Mandible with palp. 
 
 Fig. 7. Maxilla (without the vibratory plate). 
 
 Fig. 8. Left maxilliped of male. 
 
 Fig. 9. Palp of right maxilliped. 
 
 Fig. 10. Anterior leg. 
 
 Fig. U. Posterior leg. i . .1 
 
 Fig. 12. Eiti»mity of body, with caudal ramus and genital lobe, seen from leit side. 
 
 Fig. 13. Copulative appendage of male. 
 
 lig. U. Ejaculatory tube. 
 
'P Can Arctic Eiped.. Vol VM, Pkrt I, 0«tr*c<xl*. 
 
 Plate I 
 
 
 14. > / 
 
 I, 
 
 I 'I, 
 
 O O Sirs !e!in 
 
 Cyprois occidentalis. G. O. Sars 
 
10 
 
 r»i«<i'ii<"' 
 
 Arclic Kximlition, lUlS-H^ 
 
 riiitoii- 
 
 '^iK' 
 
 1. / 
 
 Fig. 
 
 2. !■ 
 
 Fig. 
 
 3. J 
 
 Fig. 
 
 4. 1 
 
 FiK. 
 
 5. 
 
 Fig. 
 
 8. 
 
 Fig. 
 
 t • 
 
 Fig. 
 
 8. 
 
 Fin 
 
 9. 
 
 Fife 
 
 10. 
 
 Fig. 
 
 i; 
 
 FiB 
 
 I 
 
 Fig. 
 
 , 13. 
 
 Fig 
 
 . 14. 
 
 .-ig 
 
 . IS. 
 
 A.lult mnlr. ««-^" '""" '•'" "''''■■ 
 Siiim>, <li)i>ul view. 
 Anti-rior iintennii. 
 
 Posterior iinlenmi. 
 
 I.ipH «H-n tron. led -I'l'-- 
 
 Miindible with Pilp- 
 
 MMilluwithvil-mtorypla'". 
 
 Uight iimJillil""''- 
 
 Pulp ot lelt i.uixmipo'l- 
 
 Anterior leg. 
 
 ",»,..riorleg. ,„„,, ,,i«My ......gnifie.l. 
 
 (ttuilul ruiiius. 
 [ CopuhitiveHPpemlagc. 
 
 Kj;ieuliitor>' tube. 
 
Plate n 
 
 Rrfi. Can. Arctic Biped.. Vol. VII, Pwl I. Ottracoda. 
 
 G. O. Sars, delin. 
 
 Cypriconcha barbata i Forbes > 
 
18 
 
 CandiU"" 
 
 Arctic Expi^Jili'" . 19ld-IS 
 
 VhiW III- 
 
 :ir^, n. ^p. 
 
 Fig- 
 Fili- 
 Fit!. 
 Fip. 
 Fi»4. 
 Fi!-'. 
 
 Adult f.'>»"l<--. ^"■" t^'"" "-''* ''■'''• 
 
 Siiiuo, (lorsul view. 
 
 Tosteriiir :inlpnn;i. 
 M»nUUwi.l...u,.l.ovn,n...ryrl^"oV 
 
 V.;ixilli[K''l. 
 rdslurior U-B. 
 Ciiucliil nviuu-'. 
 
 P„,mor!/;"-'s «"«<'"'«"' *'■ "■ ■■'"''"• "• 
 
 FilJ. 
 FiB. 
 Fis. 
 FiK 
 
 Fi^ 
 
 8. 
 
 9. 
 
 10. 
 
 11. 
 
 12. 
 FiK. 1-i. 
 FiK. 14. 
 Fit. l.'>. 
 Fig. Hi. 
 
 Adult I.maU.,s.on from left side. 
 
 Sumc, dor«il vii'W. 
 .Vitoriiir :intcTma. 
 
 I'listtTior li-i;. 
 Caudal nmiu'. 
 
 ruli.n-niary ;,atat..ry 
 
 clao. 
 
1 
 
 U. O. Sars, delin. 1-7. Cypricercus horridus, G. O. Sars. 
 
 8-16. Prionocypri* car.nder.sis. G. O. Sars 
 
 r"'!^:^.:?^^^" 
 
2() 
 
 Cditadiaii Ardir Expedition, I9I3-IS 
 
 FiB. 
 
 I 
 
 FiK. 
 
 ry 
 
 Fie. 
 
 ;! 
 
 FiB. 
 
 4 
 
 FiR. 
 
 5 
 
 Fi«. 
 
 6 
 
 FiK. 
 
 ~ 
 
 FiK. 
 
 s 
 
 Fig. 
 
 9 
 
 Plate IV. 
 
 Cani'iina suhtjihha (i. ( >. r--::r^, n. s-p. 
 
 A<lult fonialo, scon fnim left t-i<lc. 
 
 Same, (lorsal *'iew. 
 
 Anterior antenna. 
 
 Posterior antenna. 
 
 Mandilile with pulp. 
 
 Maxilla (without tlie viliraiory plate). 
 
 Anterior leg. 
 
 Posterior le»c. 
 
 Kxtreiiiity of hotly, with caudal raniu.s ami jfenital lobe, seen from left ijido. 
 
 i'audona parvula (I. O. Sars, n. sp 
 
 Fitr. 10. Feni't''^. seen from left s-ide. 
 
 Fip. 11. Siir.. . )rs!il view. 
 
 Fi<£. 12. Posti.. or antenna. 
 
 Fig. 13. Anterior len- 
 
 Fig. 14. Posterior leg. 
 
 Fig. 15. Kxtreinity of hody. with (■;iudal ramus and genital lobe, sre 
 
 '1 from lift sifle. 
 
Rep. Can. Arctic Exped.. Vol. VII, Part I. Oitracoda. 
 
 Plate IV 
 
 !i ^:.^ 
 
 o. o. Sar,, delin. j.g Candona subgibba. G. O. Sars. 
 10-l.S. Candona parvula, G. O. Sars. 
 
22 
 
 Canadian Antic Eipeilition, 1913-lS 
 
 Plate V. 
 Cylh(rili» ivxignipea G. O. Sars, n. son. and sp. 
 
 FiK. I. Adult fcnialp, pccn from left side. 
 
 Fin. 2. Same, dorsiil view. 
 
 Fill. 3. RiRht valve witli eniloKed body, more hishly magn. Ive removed in orU r lo sIhjh 
 
 the several appeiidaKos in their natural position. 
 Fig. 4. Anterior antenna. 
 Fig. 5. Posterior antenna. 
 Fid. 6. Lips seen from left side. 
 
 Fig. 7. fhitinouB frame of the posterior lip, seen from above. 
 Fig. 8. Mandible with palp. 
 
 Fig. 9. Kxtremity of same, tnore highly m-ignified, lo show the dentation of the cutting edge. 
 Fig. 10. Mandible with vibrator>* plate. 
 
 Fig. 11. .Same, extremity of the palp, more highly magnified. 
 Fig. 12. Right series of legs. 
 
 F"ig. 1.3. KxtrefTiity of a leg, mere highly magnified, to show the .-trueture of the subeheliforin hand. 
 (September, 192-').) 
 
Rn. Can Arct,. E,p,.1.. Vol VU. P„, ,, OMracoda. 
 
 F:aie V 
 
 /C- 
 
 
 
 
 n n Sars. delsn 
 
 Cytherites msignipes. G O. Sar 
 
 WBTtSBsr-^r- 
 
Report of the Canadian Arctic Expedition, 1913-18. 
 
 VOM'MR I: <iKM.RAL INTRODl'CTIOX. NABRATIVE, ETC. 
 
 PartA; NOKTIIKKN rAUTY, 1!113-1H (Tohe preparrd). 
 
 I'lirt 1): SOUTIIKK.V I'AUTV. IUI3 19. »y Rudolph Murtin AnrlcraoD (In pr,;,uri/ion). 
 
 VOLl'ME II: MAMMALN AND BIRI>8 
 
 Part A: MAMMALS OF WKSTI.KN AUCTIC AMKUK A. I'.y Ku.lolpli Murtin An.l.-rion 
 
 {In nrt iKir'thuni 
 
 Part H: lUROS OF \VK^*TKR^' AU( TIC AMKUK A. Ily It. M. Amlemon ....(Jn pr,- ,Hr,iu,m) 
 
 VOI.I'ME III: INSECTS 
 
 INTUODICTION'. !«>• C. (.or.lim lluwitt Ilisutd Dmrnhir VI, rflJO). 
 
 'art A: ( ()I.I,l;M IIOI.A. n.v .lustus W. Inlsoii] (/».«U(i/ .luh in, I»I9). 
 
 Part H: NKl' UOITlIHOlL 1N.-1,< IS. Uy Nathiin Panka ihsutd .lulu 11, 1919). 
 
 Part f: UIPTKliA. 
 
 ( 'mtie-flioa. By Clmrli':* P. .'McxaiMier. 
 
 Mosquit<K'9. liy Harrison (i. J)>!ir. 
 
 Ijiptcra (I'xrluilinK Tipiilicia; :uiil i iiliciilte). I'v J. H. Mallocd (L^^ueJ Julu li, 1919). 
 
 Part D: MAI,l.(il'HA(,A AM) AM 'Pl.t; HA. 
 
 MuliopbuKa. By A. W. Pnkor. 
 
 Anoplurn. By CI. F. Fcrri.'< and ('•. II. F. N'uttall 'liquid .^'i pd m/;f r /;. 1919). 
 
 Part K: COI.F.OPTFHA. 
 
 Forest Inserts, inrliuiiut; Ipida*, ( 'eriintbvcida?, and BuproHtidifi. By J. -M. Swuino 
 
 Carabid* md .^ilpliidu;. By H.C.I all. 
 
 CfK-cinollidie, l^latorida,',('hrys(>ineli(la.'anti Uliynrln)p[iora fp.iflutlinyrlpidff'l.By C.W'.I.orK. 
 
 Dylisridie. By J. U. ."^Iiorman, .Ir ileaurd Ihcrniher It, 1919). 
 
 Part F: IIF.MIPTI.IIA. By IMward P. VanDuzir (l <.utd Jub: 11, ViUD. 
 
 Parte;: HVMK.NtiPTKKA AM) PLANT CALLS. 
 
 Sawll ('», ('I'enthredinoitlca.) By AU'x. I>. Macriillivray. 
 
 Pariit''ir Ilynu'miptcru. By Charli'S T. Brui'S. 
 
 \Va(ip!< and Bci s. By F. W . L. Sladon. 
 
 Plant Calls. By l;. Pnrlcr Iclt iUiui-d XnreiiiheT S. 1919). 
 
 Part H: SPIDKKS, MITIS AM) MVItlAPODS. 
 
 '•"pidcrs. By L H. I'liuTton. 
 
 -MitoH. By N'allian llanks. 
 
 Myriapods. By Italili V. Chaniberlin (/ssu.i/ .lull/ li, IB19). 
 
 Part I: LKPIIiCl'Ti;UA. Lv .Vrthur Cibson ilsfurd .liuiunni 10, I9!0). 
 
 Part J- OliTHOI'Tl.KA. r\ I'. M Walker U.^.iu, d .S, ,,i, mljer '„ IMD). 
 
 Part K: 1XS1;( T Ull. ON TIIK WFSTl.UN AUCTIC COAST OF AMKUK A. I',y Frits 
 
 .liiliansen (/>•»«<(; .\uvemhrr 7, 1!>!I\. 
 
 Part L: GICXKUAL INDKX i/»«u<<i Dmmhrr , I9H). 
 
 VOIXMK IV: BOTANY 
 
 Part A: FRESHWATKH ALGAE ANi) FUKSHWATKU DIATO.MS. By Cliarlts W. Lowe. 
 
 ihswd Ffhru'tri, S:), l9iS). 
 
 Part B: MAUI.NK ALCiAK. By F. S. Collins and Marshall A. Howe Iln /.npamVun). 
 
 Part C: FT NCI. By ,Iohn Dearni's.- Ihswd June 1, 19M). 
 
 Part D: LICIIKNS. By C. K. Merrill '.hnud.lalu 18, ;;«.(). 
 
 Part !■:; MOSSi:S. By U. S. Williaiiii' (hiucd Fibruiiry 8, intl). 
 
 Part Y. MAUINE UIATO.MS. By Albert .Mann /«u,,i S..c,:;,l., r 1 :. I9r>,. 
 
 VOLI ME V: BOTAXY 
 
 r^it A: VASCn.AR PLANTS. Bv James M. Maooun and Theo. Holm. . (hxned Ortohi-r Ij. 1?11). 
 r»rt a- CONTl!IiUTK)NS To MoUPHOLOCY, SYNONYMY AND CKOCltAPHU AL UIS. 
 
 TlilBLTION OF AUC TIC PLANTS. By Theo. Holm <l,.<urd F'l'nwn/ 10, I'tSSK 
 
 Part C: CiENKUAL NOTES ON AUCTIC VEGETATION. By Frits Johaii-en(/aMi JO.-lo'Mr M;2,). 
 
 V0H;ME VI: FI8IIES, TUXIC.4TE9, ETC. 
 
 Part A; FISHl'S. By F. .loliansen (In preparationK 
 
 Part B: .■VSCIUIANS, F;T(;. By .\. C. Huntsman {Inaucd .\oumhir i!9, 192S}. 
 
 VOLIME VII: CRl'STACEA 
 
 Part A: OF:CAPOI) CIU'STA(T:A.\S. Bv Mary ,L Uatbbun (/ji.iucd Auiiust 
 
 Part B; SCHIZOPOU ( UUSTACFANS. By Waldo L. Schmitt (h.-itcd .'i<pUmher 
 
 Part C: CTMACKA. By W. T. ( 'alnian ■h::md U, U,heT 
 
 Part D: ISOI'ODA. By P. L. I'.oono ihswd .\ut,ml,ir 
 
 Part E: AMI'HIPOOA. By Clarcme U. Shoemaker (hswd .S,;,/,mfctr 
 
 Part F: PYCNoCJONIOA. Bv L.-on .1. Colo (hsu.d .liKuary 
 
 Part G: ElI'H YLLOPODA. I'y F. .I.'hansen ihfwit May 
 
 Part II CL.\ UOCKRA. By ( ham-ey Juday C/sautri June 
 
 Part I: OSTUACODA. PvO.O. Sir- f 
 
 Part J: FUKSHWATKU COPKl'ODA. By C. Dwight Marsh (h.-unl A i,t I 
 
 Part K; MAUINE COPEPOD.V. By A. Widcy ih-^uedJune 
 
 Part L: PAUASITIC COl'EPODA. Hy Claries B. Wilson (Uswd Awjust 
 
 Part M: CIUUIPEDIA. Bv H. A. P:i=brv (/n pre 
 
 Part N; THE < RCSTACl AN LIFE OF SOME AUCTIC LAGOONS, LAKES AND 
 By F. .Iiil»;inst»n ,,■,,,.. U'"*'.t*''i U*''^^n^'*:T ■. 
 
 IS, 
 
 1919; 
 
 ss. 
 
 1919) 
 
 l.'i. 
 
 19!0 
 
 l'\ 
 
 IU20) 
 
 7, 
 
 liim 
 
 S. 
 
 lOSl) 
 
 10 
 
 19t!) 
 
 IS. 
 
 VJiO) 
 
 In 
 
 p •■sa) 
 
 "1. 
 
 ii):m 
 
 So 
 
 1920) 
 
 8, 
 
 I9!0' 
 
 paratwn) 
 PONDS 
 
 •5-1. 
 
 wm 
 
' J m "KI-Mu.^^