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PART E: ACANTHOCEPHALA By H J. VAN CLKAVE SOUTHEI^N PARTY 1913-16 ,^^ m-fv:^^ 670 1913 i::2t V . 009 pt.E OTTAWA J. ciE LABROQ'JERIE TACHf. PRIN^FR 7C THE KING'S MOST EXCELLENT MAJESTY 1920 Report of the Canadian Arctic Expedition 1913-18. VOLUME IX: \NNEIJDS, PARASITIC WORMS, PROTOZOANS, ETC. Part A: OLICOCHAKTA. I.iiiMhriiiiliilai'. fiy Frank Smith. liiirhjtraeicluo. lly I'aiil S. Welch.. . Part n. rDLVCIIAKTA. Hy Hulph V. CliaiiibLTluin Part (': IIIUUDINKA. By J. P. Moore Part O: (iKI'lIVlUlA. IJy Halph V. CliMiitHTliii. . . Part K: ACA.NTIIOCF.PHALA. By H. J. Van (leave. Part F: NKMATODA. By N. A. Cobb Part G: T]li:MATt)nA. By A. !{. tVx.per Part II: CI'.STODA. By A. U. < '..oper Part I: TniUKLLAlMA. By A llu-sseU Port. J: (iOHDIACFA. Part K: SPOHOZOA. By J. W. Mavor Purt L: Part M; lOllAMINlFKKA. By J. A.Cmshnian (Itstii-d ,S<- lUenihrr 3'J, H'l!'). (/n (trinai. .... (hi ]'ni/iirution i. iln press). Iln iireim), (hi I'rejMiriilinn). (/n nrepnralum;, {In preparation). (In preparnt'on). (In preparatiur,). (Isnicd '' hr-iaryC, liiBOi. REPORT OF THE CANADIAN ARCTIC EXPEDITION 1913-18 VOLUME IX: ANNELIDS, PARASITIC WORMS, PROTOZOANS. ETC. PART E: ACANTHOCEPHALA By H J. VAN CLEAVE SOUTHERN PARTY 1913-1 : OTTAWA J. de LABROQUERIE TACHh. PRINTER TO THE KING'S MOST EXCELLENT MAJESTY 1920 tnucd April 7. 1930 Vi'iinlhiuH'phiil.i of ihf r.inadlan \ri»!i I \pftli»ion, I'M.'.-i'MH' Willi J I'll'. • Kin >l>l I I (UN. 'I'llf .iralitlmii |ihiil:iii hiiiria <'\ \\\- \ii tli M u - lii I' ' ' l\ ■■! Iifli ill' iitluti I'l'DIll ilivc -ll|i;i il-. :i« i\ nil 111 111 Iv ll|i iMiMUli lililiii'i- 111 il III lil'liittlir |{i iiinU 111 -iillli 111 ill' lalU 1 Aprilllliili- iiilil:iili nil Mini- {,, {\\, luiiii tiliii- 111 \r:illlliii«i'|ili:il:i in iIm' Atrlir lull iim-l nl lln' .|i -; I ijilli m- :iii lim viinH'- III 111 111 \:illii- III :ili\ iii|i-li|il;iliii|i m1 tin l.iMili.iMU nl tin uliiU|i >|ii in - ,li-rlilii ^ ; 177 I i|i»i III" i| li'ln HI 1 nirl Oi,il I- nliMi ill-l\ :i -pi rii- iil \r:ililliiii'« |ilial:i. Simli iilli rwalil, t('ii>ilily lii-iirril li\ lln- ili-in- In ili-triliiili- all nl lln- -piin- iiaiiii- llllii Ul'"'l|'^ wllirli Uiiillil al 11 a-l UIM lln appialainv nl a rnliiplrtrh wmki il nut >vlinlivm\. A cniisidt lalilf iiimiln r nl' >piiii> ni Araiithm ipliala liavr Ihi ii ili-< lil.iil liy I'liliipt ••II pala>'iln|iiiii»ls trnlii lin>t^ 111' antic nr :-iili-ari tir lanitr. Mn-I ni ill!' .«pci'icf« have lii'iii t'liiiiul ill \\liali« ami ntlni iiialilic iiialiiliiii- \ii\ littln I'viilciicf is availalili' i-riianliiiu lln^ Aiaiillinripliala nf aiftir Infl- ami fislii's. \'»(ii l.ilistow I I'.MI'm piiliii-liiil a iipml nii tlic para-itir xmiiiiis ..lilailn i| l.y llir Ull:«-iali I'nlar l'.Xp< liitlnn nt' I'.MHI P.Hi:'. ill wlliill III' HaVf linMlipllnii- ni' tlilfc spci'li'- 111 Araiilliiii ipliala n pirMiitiii;; tlif I'aillia nl' Wol rajiiiirlainl < )| tlu'Sf, a iifw specify. EihiHdi-hiiiiiliiiy /ii(/)i(. was liisriiliiil fnmi tlir Kiiii; {•;iilt'r. Siilllilli nil tHriiiliill 'i sihi-tnli.' s; wiiilc the Iwn niiiailiiin: >pi rio ('mii- niisomtl xtniniii.- writ' I i> awan tliric an- im piiiili-ln il nrnnls nl tin- ni'riniilii i \ri.'.;liur(pliala 111 till' alilir faUlia nf Nnitli Alinlira 'I'ln' rnljii tinlis nlilail ' li'. t lie ( aliaillall Alilii' I'-Npiilil imi llill- ntlil all nppii|tmi;l\ III' iiiakiin; a star, '-'"anl tiic -lil'l.v nt' tliis iiitiic-tiiiu failii.il ii-tiinli. \I \ I h.llt VI.- \M> Al KM>\\ l.l.lii.MI \ I - 'riiniiiuii till' kiinliif— uf Di. A. H. Cn. pir tin- wnirr lia- rrmv id inr -Hilly the rnllfclinli nl' Acaiillincfpliala taki'ii li.\ Mr. I . .Inliaii-rii. iial iii:ili-l nil llir ( 'illiailiail Alrtir i'.Xpcililinll. Till- rnllntl.iii i- lint cM cll-U r. illlnl wiili ri'uaril In ilir iiunilii-r nf Imst sprrii - npri'si'iilril nr in liir iruimi- n pir- -illlcil. Nl'Vrilllcli'sS. silir it nplr-rlit> lllf lir>l alclii' cnlliTl inn nl tl|r-r para>itts from thr .\iiiiiiiaii iniitiiniit it ,-riins wuilh wliiln In piiMisli tlif rr-iiii- nf this iii\i-iitiatiiiii. Must i if I lie -pnciini'ii- wnrc inlliTi 111 ill till' \iri nil y nf liirnanl liarlmiir iDnlpiiin ami I'liinii strain. Nnrtliwi'-t 'I'.i ritnrn-. wlicrn •Ci ml 111 111 '1.111- 1 11.111 ill.. /,i..il.n;i.:il I.al"ir,it..r> ..!' llii I iiiv. r»il\ nf llliiii.i-. \ I 17. Tl'i.-.i J Ciniiiilidi, .\nlii- l\rii"lilii>ii. /.''/. .'-/N ,1,.. n„,ul.,,-„.,l.,.,.Mw.llt, n:Mlrth,.,,l,.;M;iMUart,r~lurMnm>i.l.,Ml.l.I-^ ;,, '.' ^-'.Ml husl MMiivi,lual.. nnv,. s,,r,-i..s nt hr>l,-wat..r hsl,r>. two n' . Wh.^ an.l on. l.inl .unMit.t. thr ,nti„. liM oi .,Mntl„..pl..la„ mst^ ;: ,„ I V 1>- .•x,...cl,t,on. In all, thr^. hail v,l l-ur .,>..■„ >ot .\,a»,l.o.T- ih/, ■/,,,,..,•/,.,'■/,». ,.,/„/-., .../ /•■ ...ru/,.., aiv .•l>avar1..r,stu. .pyj-.-s n.Mj ,1 k man i osirapinral ra„.- uf In.tl,. /•>/,„-,.■/,,.<■/,.. ,/,./., ll..' unly sp-r,..- ■Avr ilivni in ill'- tnllnwni'i p:iia'jrapli-. Filicoltis arcticus, n. -p. lPI:i1r I. 1 lU,- I 'I' •' Cildi : .iiantic i .lolianM'n'- nntc^i. <,nni. l>M.:Nn>i>. With th,. .harart.T. ..I tl.y u.nu^ a. nn.n.l--,! Ky V,n Cliav I'.Uf,. H,..lv ..r fully n.atnn' n.atvi.luaU I'fsri-vr.l m air,. ho, 1 ,n ■ 1 i 'k app.oxin.at,.rv ,.vlin,ln..al in .-.nss srrfon. nu.,'!, toU,.,! or ^v,■mkl..l. ; M -i V .n . st.nor n-.ion; .lu. to .ontra.tinn ; at.ot.t .'(. mt... lo„« a.ul ., tutu, , ' n xi n n .liatn.t.r. Ant.nor portion of l.o.ly wall ,.ov..n..l ^V'H' 'l-' "- ' . „ ht spin.s, v,siMr only in .•l.an.l po,tH,.,s ot thr ho. y-wall, Vv.A,o.n> ,v , -77 .uin. lonsi, an.i 0T.>. .nn.. it. .liatn.t., . ar.n-.l with twvnty-tw,. nu ulal ..ws of s,.v,.n ..r .'i^rht In...!.- 'a,.!,. Four ..r t.v.. h....ks noar,^ ; X •, row nu.n. .h'h.af ■ than tho, • a,, -.r to th,.tn an.l B-'I-pl'-l >v. h t p ..mitn.nt .....ts. An1 .n..r h..ok^ p,ov,o A w.th pn.nnn.-nt P-;;'"' ,„•„ ! ii n.ots l..n.^..r than .!,.■ Imok pn.p.r, IL.oks ran^r.' m Irn. h t .,m ^ • , is" H.avi.r h.M.ks of ant..n..r pn.h..>.-.s .'.-...n a.v .io M.thn^k at i ...nt ul-m'^uv ff...n prohos.Ms wall, whil.. th.-sv ..t p..st..r...r tvpon ,....«.• tr..... S M u hi.k. N.'.-k app.-oxi.nat,.|y .•ylin.l.i...l. 1 ■;.> mm. l..nK l.v 0-1 1 mm. lu ■nu.'r l"n.hos,.is n' '.pta.-h^ i.^s.at :■.! at has.. ..t pfol..,s:-,s ami ..xt.-n.hn^ H 3 n '.'.k at..l int.. ho.lv .-avity, ...tin. ht.trth -' ■ :, tu.n. l-..nl.,y..s wtthtn Il'ly r'lvUy of p,av..H,.n.ai;. 12(i to 155 , Ion. hy HO f. H . n, .hanut r. n.os, fr.'.iu. tit >izf iihoiit l.")(> hy 11m- , , , • . ,■. ' IV p.. host. Kin.^ Ki.l.T. Snn,a>rn„ .<,. W.'./.- LnHurus,. u, inf^-tu,.. •rvp..l.....alitv, H.a-nar.lhail.our. N..ithu,>t I ..ml :.ii..>, ( ana.la. ('oll..il .1 hv Mr. 1'. .lohans-n. .hni.. If.. i'-Hi.. ^; ,;.;';',,■;. .hp..si,...l in th.. \ ,..t-.v,a \l..n.,.,ial NIu- .urn. ..ttawa. . ana.la. .,11(1 in til.. ...ill. ' ti.n ..f th.- writ..r at I rl.ana. Ilhn..i.-. •'" ' ' -1 , ..1,„ - .p.-,-i,s .h-s.-nption IS l.a>,..l ..p.... tl... ..xa.umat....i -.1 h.u. sp...,- „„-„. 1 all of th.>- th. pr;.ho>.-i> was ...„npl..fly ntra......! wit im h.- ho.ly ;■;.,,.„. ,.„n,-..nii.iji Ih.. pr,.l...-..is an.l its ass,....at...l tl .' I 1 Iw 1 ,.f this .an... in.livi.lual w..,v iti lik.. taat.u..r ,l..ar... a.ul mou.if.l o , t.,f a stu.lv .,f th. !....ly spi,..>s whi,.h an. u.in.....pn.ahh. ... su, a,.^ ■i.-v ..l,...holi.. ~p.M.im...,.~. 'n...s,' spi.i..s iv..all thos.. pn.v.,.,islv .!..>,•. .I....1 I, h- w t -r f..r r^Ucoll,. I.nndns iti that in tho s:iav..l t.-uah- .li,.y a,- y.ry poorlv .h v!.l',.,-.l. app..arn,. a. v.as .h.h. .•h.v:m..ns ,.t . .,■ .att...ula >n wh„h 'pi,,,.:, ar.. ..l.s.rvaM.. .mlv thr..u-h .-his. ..l-sfrvat..... ^s...' IlK- ■^)- .1 iiiylliiii I iihiilii \ ciPlllplirisiill uf /■'. (in-tll-ll.s willl iilllrf kll.iWll llhllll.cl- ul ihr -:iiui- U'llU- i|i-cliiM's suini- iiilriT>liiiy: i:ii-\- icuiinliim iIh' i£iu'^i;i|)1iic;i1 di'liilnU mm m| tin iiiciiiliiT> i)t' llii> ci'iiiis. /■'. iiiiiili.< i- the r.iimiioii iJir. i|i;'a II r pifr- ■iil.il iv.' .it l-'ilii;illis while /■', liiiliiliis ciccin- in lllr I'.idrl-S in ill'' lliit.d St;if-. F 'hcnlli ^ mrliriiy. li. sji.. in linu~ a distinctlv i'lii--f rcOalinMsiiip I^i /'. Ii"liihi-.. I',inlii-\n- within llic limly caxitN- nl' the sii'aviil Iruiair i>f thr la>I naini'il -|if.'ics lanm ii(ini 71 to s:i ju in Icniitii while tlii»e uf /■'. (nclifis vaiy t'lMin I'-'t'i t < i.')."i ^x. '\ In- iwii Aineriran species also iHtTei- in the iHiinl>ei- n\ hunks un the piMlin>-i-. In /■'. hotillus theli' ai'e l>llt sixleen Innuit llilinal tows (if hiKiks wllili' fur /•'. mi-l'ius llie writer has fnlllKJ t wenly-tWd. Huth i.f these .\ineriph('rical iiilarj^einent uf the pruliu~ii> eharaeterislie uf the Kiirupean ~p -ei. ■^. The Kin^: l-'.iihf. tlie hu.-t uf /•'. iiiclnns. thiiUfiii ein-uiupular in it- ili^tri- liiltiuii. eviilently dues nut eaiiy the same ai-anthueephalaii infestation thruUfih- .iilt its raime. Fruni the We-t Tajinirlanii p'iiin>iila. vun l.in-tuw l',K(.'.:;>i ih'scrihcd Kclunorhiiiirlni.-; jiiiixi fmni this same host -pecii-. liifurlnnatelx- iiis description and liis tijime- uf this species fail t • i:ive a full enuu^ih accuuni uf the structure 1 mad.' in th t ai ul any peculiarity in tin' structure uf tic mik ui- ant riur liudy ri'iiiuii -u it - ■ in- pruliaiile this is not a unique >truclui-e luit is simply an error in tlv e\ ■ciitiun of the (h'awinu. N presented, eitlua' in liis deMiiptiuii .■!■ in h:.- ti(;ures, which would make it -;eem proliaMe tiiat his spe/ies li lunii- '',,''"' -iemis I'Hii-itUis. 'I'liur. oil oppo-ite siih's uf the arctic circle th' Kin^ Va^V-v appareiitlx- is ])aiasiti/.ed li> Acaiithoce])hala niiresentinsr two chslinct genera. Echinorhynchus salvelini l.inkins. lUls In Ward and Whipple . I'l:itc II. l'm<, r. I.. (I , ('ulur; urany;e ur arecnish yelluw i.lulianscn's nute>'. SfKciKIc DlAiiNOM^.. With the characters i^i the ;ienu>. Anterior p, ntiun 1 f l)o(ly-pn)])er rather conspiiauiusly eiilartied. espi'cially in the females. Males 7 to 12 nun. lonn and OS to 2 mm. in maximum dianiet'r. l"eniales 10 t i 2(1 mm. loiip and 1-2 to 2-2.') mm. in maximum diameter. I'roliuscis cylindrical, armed with sixteen to eighteen lonjiitudiiial rows of ahuut thirteen hooks each. Basal hooks about 8!> to .")() m lonji, huuks on midille and anterior resriuns of lirohoscis 44 to tiS ^ lonii, some with a rout atiout s:i fx lonsr. Lemnis.a sliuit little longer than proboscis recei)tacle. Kmbryos within bo ly cavity of trravid female 11.") to It).") m long by 20 to 2.") /j fir.iad, nuddle nieinliraiie formini!: .a pro- longation at each i^ole more than twice as loni: as it is broad. fi-e(iuently charac- teristically curved. Arctic hosts: (' nxtivonn r naniiiiicKsh iWalbaunp and Sdliihnus iimlnHi iWalbaum). Mure detailed data of the occurrence of this species i~ tiiv- n in the following table;-- HKfonns OF THi: occi i{iti;.\< i; "i /■: s,\i.\i:i.im in iiosis m .VKCTU; .VMKHltA. Host. ('rt.-'firnlfif r hutfinifi t^l l.ocalitv. Date liniiiirk I.iikc.il Herii;ir(i li;irl r I irtelM.r, lltl.'i /■.' .-//■./.•., .iiily. .June l.'i, JJ. Jli. I'M.", /•: ...,'.,/.."- al-o, \Mril. I'Uli /•; ,."" :il-e. Stilri lihii.^ fiHihiHi (irr.l, :it HeniMid li;ni..iiir .Inlv !:i, I'.M." /•;, als • 1 F, ('(indiliiin Antic Kxjiiilitinti. I HI 3-1 ^ Iluliviilii:il> .if this spcrics fr.iiii tlir Miitii' ;iir nl' (■nii>i(|i ralily hnurr ^izr iliMii tliuM' cxainiiii'il l)y llic writir fnnii Im^ts cil 'I'lir (licit l.:iki>. I'Ih- liillx miitiirc friiijilis fri(|iii'litly ic;irli a Iciiutli nf 20 iiilii. ami >liii\v a vi r\ piniiiiiiirit I'lilarm'imiit if llic alilriiiil- puitiull of tlii' huily ifiiJ. (i). '\'\\\> (iilaruiiui'lit is not tif tlic typi' loiiiirioiily occiiriiiiu in (jiavid fcinalrs of otlii'i spirics. iirvolviiij; a piactii'ally uiiifoiiii ilistiiitioii of tlic IkmIv. hut is rcstiictnl tliictly to \\\f iloisal siiifaii' lliciflix (liviiit; tin ili(li\ iiliials a distiiictly liilinpid appiarauri'. In males this anlciior iiilaiirinii'iit cm .-ms only laicly itiji. N). Tlic niali> of tins spci-ics licai' a sliulit rcsi'niMancc to tliosc of A', iindi. in that tlic cciniiii ulatids ari' aifanncd in ai)pi'oximatcl>- lincaf oidtr in tlic posterior icjiion of tlic body, tlioiijili frcipiciitlv tliosc iicaf tlic . nd of tlic chain in /•-'. .-uln li in ovcilap one another. In the original descriplion of this spciics the nuielHi- of proboscis hooks was limited to sixteen loniiitudinal inws. I'hc piocnt wiilci' ha> t'oiind indivi- duals in the arctic collections pos>essinc eighteen loiijiitiidinal rows of lMok> liiit in all other details airiccint!: with the dcsciiption of tlii> species. Kchinorhynchus coregoni l.inkin- linXaii ('lca\e. I'.H'.ti. >1'ImIc II. 1 It-, Id:, 11.1 II . ( 'olor: as I he pieced inii species i.l.ihanscir.~ iiote> i. Sl'Flt IKK DlAfiSosis. With the characters of the ircini-. M.ih- :i in 't mm. lon(r, with a maximum diameter at ali of hooks. I aeh with ten or eleven hooks. Hooks not crowded on prolio-cis. Hasal hooks 28 to it'.i fx lon^i: those on middle of prolioscis tio to SO ju loiui: thos:' near anterior tip smaller and weaker than those on miildle of proboscis. \ entral hooks .slightly larger and stioiitier than dorsal, l.cmnisci not lonijcr than prolioscis receptacle. ( 'emeiit f:i:!nds of male in a compact mass. lunhryo- within body cavity of ni'avid feiiitdc ol to 01 n lonn by IT to '20 m wide, with a slight, approximately globular, prolongation of the middle membrane at each pole. Hi;C()l{l).-< or THK (XCIKUKNCK OK /■:. coHECOM IX llo.>;TS oi -VUCTIC AMKllIC-V. H().«l. ( 'nsfii ttnn r mituiujiitsh Sidif Until' iiiiihiiii boealitv. Dull |{ciiiarks l.:ikc .11 Hcnianl li:irliiiur .liiiic l."i, 'JJ. .'li, I'll." April. I'.IKi il.-ii iiifoted with /v'. xitlriliiii. ;''rcck 111 Bcnuinl limlnmr .Inly \'A, 191.") /•.'. .<'ilnli)ii al.«ii. , , !.lunc 2,S. I91t) A', cornjnni onlv. S. ngunsKii marsloni I.akr at Bprnard liarbour. i December, 191.") !•'■ rnrrgoni only I " " " . . Ortobrr 1 and 'J, 191."i /•.'. roriyoni nnly In this species thi* nuclei of the subcuticula are very lumierous .and are distrilmt'd almost uniformly over the e.tent of thi' body wall. Each mass of nuclear material is surrounde. The writer ha> found the individualti of this species from arctic hosts to be considerably laiger than individuals from the region of The \ii Iirt\- .-IH'ciliH'Ms i)f this S|ircii'~ Wflf iilit:iilii'c| I'icim ti-li >|.:MiMliI]- ■ nlliiircl liy Df. [{. M. AikIiixhi ;il Hiitiks |niiiiisiilM. Matliiiist iiilit. N(irlli\M>t Tiiritdriis. Miiy IS. llHtl. A >iiii:li> laitir sprciiiicii wns t;ikcii froin tlic slninMcli 111' till' ('(ill, (iinhis ciilliinns I.iniiMi'iis, jtt Statinii ISc (Maiiks ixiiiiixihi '. I'lic ii'iiiailiiliK wiiitiis laliic t'lnin llii' ( 'alit'uriiia ''"oiiicimI. M icniiiinhis jini.riiiiK.^ iflirard). at Station \Sl, (Hanks pfninsiila. sainr date and plaii' a> ai»i\(i. As is (■usNiiiiary in this >|MMit:-. the >|ii(itnrn- \ary uiiati\ in >]/.<■. 'iMiDsr ( I till' prcsftit coHntinn tanui' I'ldin almnt N nun. In iivcf .")(l mm. in hnuth. I'his i.- iitM' pci'if> has 1 n irpurli'd fii'(|iicntiy liv Linton from numerous species of fishes from the .\tlaiiiic coast of North .\inerica. iin'luilinti dtuliis cnlldniis. and also from M irriiiiuiliis liiiiiroil which is closely related to .1/. p'-iisniiiis. 'I'hr writer has als > examined spei'iniens from Imth of these lasl-naim'(l hosts and has compared them with individuals fiom I'.nropean lio-^ts and with the arctic representative. Spec-i- mens from all ihri i localities undouhtedly helonn to the >ame species. < iiM 1.1 slii\>. The .\caiithocephala collected liy the Canadian .Vri'tic jixpcilition comprises two tyiiic.ally North .\merican species of the cemis lu-hniorhiinrhiis |)arasitic in fiesh-w.itif fishes, one species of lu-liiiiiirliiiiichii-< common l;i mariii ■ fishes ofhoth Kuropeainl .\inerica. and a fourth species of the ceiuis Filirnllis from th( Kind Ilidei which shows distiin'fly I'loser aflinities to the previou-l\ descrihed North American represent; five of the licnus than to the lairopean. There i> im evidem-e indicatiiit: any ti'iideiwy towjinl a mi.xinc of .\mericaii and liur.ipcan species of .\caiithocephala in the arctic reiiions. The evidi^nce is tio frag- mentary to permit of any statements of the tieiieial distriliution of memhers ol 'his >;rouii within the arctic i-ircle. i.ni.n \ii i;i: ci ii;i) • ■'"■zc, .1 -\. K. I"h2. \('rsurli eiiicr NuturKc>cliii-hti' ilir Ijiitrwi'iili-wuniicr iIhctimIiit Korpcr. BlankonburK. von I.instow, (). 190."). Hclminthcn dcr Hiissischcii I'lilitr-lApcdilieii KKK) I'.tnii .Mim Acad. Imp. Sc St. IVtrrsboiirtJc, .S-ric S, Class I'hysuo-Math., lx:l 17 l.ulu'. M. 1904-0"). (Icschirlitc and Kritctmissc <1it Kcliiiiiirhviichcii-Korschiiiii: his auf \\( -,1- riinib :lH21i. Zoiil. Annal., I:i;i9 2.")0: J.M ;j.i:V 1011. Die .Vcanthoccphaloii. Die Siisswas.scrfauria Drui^ihlatids, Ilcft Iti .l.ri.i V:iii Cleave, H. ,1. l!»lfi. Fihriillts Imliilns, ii. sp,, will, iiiitcs on the <'liarac'leristics of tlic uriiii.-. Trans .\iiier. Micros Sec. :<.");IM1 IIU. 191S. Tl„. Araiithoccphala of North .Viinrir.in |'inl> 'rum-, \iwy Mi.ro-. Soc , :i::l!l 4S. 1919. .Vi-aritliorcpliala from the llliiiois Itivcr. with di-ciiplion- of -]irci(> and a -wiop-i- of the I-'amilv Neiiei'liiiiorhvinhida'. Mull, 111, Nat, lli>l, Siirvev. vol l:i. No s, Wanl. II. H. and \Vhipi)le, C. C 19|s. |-ivdi-»aicT Minlouv, .lohii Wilrv and S..iin Ne« ■S'ork St. ('tiiiinhiih .\rvlir HxiMdiiioii, I'Jt.l-IS KXri.AN A'llON 1)1 l'l,\ii;s All li(jiirc> were diawn Willi I lir aid i>f ii ciiiiiciu lilcidM t'niiii lir»ali>\\ liii sluiiic-d iiiuiiiil- ill liiimiir, I'xrci)! (iKUic 1, which svas frriiii an alcdtiiilic sjiciiiiirii. M;i|{iiitiialiiHi is iiidiralid li\ a pnijcrli'd |Kir1ii)ii of a sta(jr iiiicnniii'trr accdiiipaiiyiiic lai-li drawinc, valiM's of ihc-i' M-alr~ arc nivcii in a foolnoliv I'l.MK !• riliiiilhs (iriliiiis, II >|i I'iR. 1. h'nmlc, sliowiiiK (jcncial body form. It \va> fidlii tlii- individual llial llic prolMiM'is «a- later removed for study. '2. Profile of proboscis of fully mature female. :i. Surface view of a jiorlioii of the body wall fniiii nialuir female. -Iiowiinj culiiular spines. 4. I'roboseis of same individual shown in fijj. 1 . ."). An embrj-o from body cavity of gravid female. ■ The .scale indicating magnification acrompanyina l-'iK. I lias Ihe value of I nun.; >cali'> : ompaiiv in^ all other fi(cures of this place have the value of 0.1 nun. Annithdfi'iihnlu I'r \Ti I Iti; '-)"^; ^ \ .-' L. I \ i ■ \ y ■i \. i\ ..^<^ .J) ) ■1 .•*?■■ ■ ■» i/^^ 1 10 K laiimli'iii .\)i->ic Kxi>iilitt'>ii. l!H.i-IS T. l-.Mil.rvofnirii ImkIv .■iivity ni ynivi.l trmiilr of /• .s„/-,(,„ ,1,:UM1.- -h.KMm; n n.r,,! ImhIv l.>rr,i nl mmIuiv l-niali > \Vilcof -'■' sii/rr/HK 111 iiptical vcrliral si'clloll, , f f , ; II. I'l.rticm of \.."1.V wall .if /•;. ,„rM/.".l, -lioullltf MUIIHTnll> Mll.lU MlhMltlUlUI •• Si'iil.'s in.lii-Htinn iiiuKnihii'tiim mi uinpanymn; liKUiv-^ C, >, mill i» lii>^'' ""■ ^^'lii'-"' - """■ '''"^•' I,... pimyinE twin- St ami 11.0.1 mum- •'■"I hijur.. ..H".. m .1 cnnthocephnla I't.AIL II 11 V. IB- "■". ^ cy.' Report of the Canadian Arctic Eipeditioo, 1913-18. rONTKNT.S OF PAUTS IN PREPARATION. Voluiiw l! Cifmral Introducllon, NamUtt. rtr. I'.irt A: Nortli.Tn I'nrlv, l!M'l-|s. I'art H: Nrnthern I'^rty. lUI.MB. Uy |{ ,,| ,lpli M ,rtln An-lorion. (In prtparaiiaH). Volunir II: Mamnub ■nd BIriU. ManinmN. »v Ruildlph Muriin \n.l,-r*in. ,/^ pr.;wni(t<)ii). liinJa. Hy II. M. \n.liTi.m.inl I'. V ruMrri.tr i/i ;)r«p,jr4«ijp|). Voium«lll: laaeeta. f'nll.-nilioln, Itv Jimtus \V. rnl*mi /..m./) .Vi'urcpl.Tiiiil Inwrtn. Uv Niilliiiii lliinki. iht;r,1). [•U'U'm. Ily llnw. W, Aloxmvl.T. Il.irri«.n d Ilynr, .■»n.| .1. H MiilLi-h. (lii;*l). " lli>k(-. (i r I'orrn, nnl (1. II, K. Vuttall. iln, riM.C. W. I,<>ni{, and r. I). Sli.rm.in, .Ir. i/<. Ma.-(;illivray, Cliarlu* T. Uruea. K. \V. I. -Ila la ".»rt A I'artU I 'art A I art II I'arK' , ., I'lirt I): Mull.iiiliiica,in. I'y I-. Cullins. /a /.,-. ;i.ir,i/,„,). 1 unu'i. l!v .l.ilin iH'arnc-n. I'url It; l,irl,..n^. I'.v K. L. Merrill. l';»rt l;;tMo»si..-. Hy |t. s. Willianu. In itrffhir'U: (/i /ir.',i.ir.i(' ml. Volume V: BoUn]r, !>'' jV '■['"worinj riantd ami Fern,. Hv Juhi.m \I. >I.i, „un, an.l othnrs. (In pr,;„ir,h.,i.. 1 .irt H. Oeneri.1 .Notes un Arctic Veneliiti.iri. Ily Iriti liliunson. ( In pr.)j.ii-.j(i.,ii. VoliinM VI: I'liiliei, Tunicate*. Etc. Part A: Fishes. Hy F. .Inlianiien. (In rrcpin.iii,,'!!. liift H: Ascidians, etc. Ity .\. (i. I"iinlsnmn. In jirrparation), Vuliime VII: t'rustaeaa. I'art A: necapodCruKlaceans. Hy Miirv .1. Itatlihiin. (/"'"nJ). jurt H; Scliij(i|i.i(l Crustaceans. Hy Wulijo I,, .'^cliii.itt. IIssumI) I art C: Cuiiiacea. Hy W. T. Caiman. (In iir-frm r,u'<). I'art I.: I'araaitic Copepoda. llv Chaa. H. Wilson. (In press). I'art M: Cirripedia. Hy II. ' I'ilsbry. In i>rrpnr,ir.-p.ir.,lion). (I'orilera, Actinozoa, and Al.'y>M:iria: mali-rial small in amount, a.id no 4peoi:ili.st.< sol-ioted). Volume IX: AnneUdg, Parasitic Worma, Protoioang. Ktc. Fa.-t \: 01ii.;ochacta. Hy Frank Smith and I'aul .><. Wel.'h. (lssu,A). lurtH: I'olychapta. Hy Ralph V. Chamherliii. 'In press). 1 art (': llirudinea. Hy J. I'. Moore. 'In prrp^irnli'im. Tart I): < .ephyrea. Hy Ralph V. (Jh.aiiiherlin. /n prca.O. I'art 1.: .Vcanthdcephala. Hy II. J. \an Cleave, iln press). I'art I : Ncmatoda. Hy N. .A, Cobb, iln prep^iratinn). I'art (1; 'rreniafoda. Hy A. R. Cooix^r. iln prKpar^iHon). I'art II: Cestoda. Hy .\. 1{. Cooper, iln prpp