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[Reprinted from the Canadian Record op Scibnce.] 
 
 i 
 
 Notes on Fossils from the Utica Formation at 
 Point- A-Pic, Murray River, Murray Bay 
 (Que.), Canada. 
 
 By Hbnky M. Ami, M.A., F.G.S. 
 
 Whilst preparing my paper " On the Utica Formation 
 and its fossils in Canada" for the Eoyiil Society meeting of 
 last spring, a very interesting though small collection of 
 fossils was kindly placed at my disposal by Mr. Walter F. 
 Ferrier, who had obtained the same in the black bituminous 
 shales which crop out along the shoi-e on the .Murray River 
 neai- its mouth, holding a fauna pre-eminently Utica in its 
 fades. 
 
 The numerous and interesting geological features of 
 Murray Bay and its environs have in years gone by received 
 much attention and elicited careful study at the hands of 
 geologists, notably Sir William Dawson, Dr. Harrington, 
 members of the Geological Survey staif, and othej's whose 
 contributions form a valuable series of articles in the Cana- 
 
V 
 
 102 
 
 Canadian Record of Science. 
 
 dian Naturalist and elsewhere. (See Dawson in Can. Nat., 
 vol. vi., p. IHS, i't al. loc.) 
 
 In the " Geology of Canada, 1868," the geology of that 
 district is sketched out carefully with the accumulated evi- 
 dence at the disposal of the writer (Sir "Wm. Logan) at that 
 time, but neither here nor elsewhere have I been able to 
 find any record made of the occurrence of rocks belonging 
 to the Utica formation at Murray Bay. This is my only 
 pica for the present notes, which are hereby submitted as a 
 humble contribution to the knowledge of the geological his- 
 tory of the locality in question. 
 
 From the papers already published, and the lists of fossils 
 therein contained, both the Bird's Eye and Black Eiver and 
 the Trenton formations are known to be well developed 
 and easily recognized among the Cambro-Silurian or Ordo- 
 vician strata of Murray Bay. 
 
 Sir William Dawson has recorded the occurrence of Am- 
 bonychia radiata (Hall) along with species indicating a lower 
 horizon than that species, but its presence may certainly 
 point to the development of strata of less antiquity than the 
 Tronton formation in that district, most of which have 
 been long since removed, either (?) by glacial action or 
 by other denuding agencies at work everywhere. No dis- 
 tinction has as yet been made here, I believe, between the 
 Trenton measures holding a charJiCteristic fauna and the 
 Utica Ibrmation, which holds a fauna very similar to o 
 rocks ofthe same age at Ottawa, Whitby, CoUingwood, and 
 other places where that formation is developed. 
 
 From these shtdes, which are black, bituminous, some- 
 what indurated and calcareous at times, holding numerous 
 organic remains, the following species of fossils were ob- 
 tained in a tolerably good state of preservation : 
 
 Ehabdophora. 
 
 1. Diplograptus sp. (resembling D. pristis, Hisinger). 
 
 POLYZOA. 
 
 2. Pachydictya sp. 
 
 • • • , • • . . 
 
 .••••• . ». 
 
Notes on Fossi/s of Utica Formnfion. 103 
 
 Braciiiopoda. 
 
 3. LeptoboliiH insignia, Ilall. 
 
 4. Siphonoti'ota, sp. 
 
 5. LepUcna sericea, Sowerby. 
 
 6. OrthiH testiidimiria, Dal man, war. 
 
 Cephalopoda. 
 7 Tiocholites ammonius, Conrad. 
 
 8. Endoceras proteiforme, Hall. 
 
 Trilobita. 
 
 9. TriarthruH sp. (?) 
 
 10. Calymene senaria, Conrad. 
 
 Ostracoda. 
 
 11. Leperditia (Priraitia) cylindrica, Hall. 
 ^^- " " probably n. 8p. 
 
 Notes on the above Fossils. 
 
 Ehabdophora. 
 
 1. Diplograptus sp.— a few broken and imperfectly pre- 
 
 served stipes of a diprionidian, or pctuloid graptolite, 
 whose specitic relations cannot satisfactorily be ascer- 
 tained with the specimens before me. 
 
 POLYZOA. 
 
 2. Pachydictya sp.— Several fronds of a species of this 
 
 genus, or of a very closely related one, occur in the col- 
 lection. They exhibit a considerably wide nonporifer- 
 ous margin. The iorm in question may possibly fall 
 under one of Mr. E. O. Ulrich's species, but which is 
 not as yet definitely ascertained. 
 
 Brachiopoda. 
 3. Leptobolus insionis, Hall.— This species occurs in toler- 
 able abundance in the collection, and is well preserved. 
 
r 
 
 104 
 
 Cunndian Rcfrrd of Science. 
 
 It in eminently ehanicteristic of the Utica wherever that 
 fornuition ha« been traced in its natural position over- 
 ly in<,' the Trenton formation in Canada and the United 
 States ; so that its presence at ^lurray Bay alfordsgood 
 evidence upon which to determine the geological hori- 
 zon. The specimens from Muriay Bay exhibit the 
 radiating lines very well, showing no appieciable varia- 
 ti(m ^iomparcd with Ottawa or Collingwood specimens. 
 4. SiPiioNOTUETA sp.— This is undouhtedly the most interest- 
 ing and i-arest form in ihe collection. A cursory ex- 
 amination of this form and the associated specimens 
 was made some three years ago, but at that time it was 
 considered and grouped along with the specimens of 
 Leptoboliis insignis; but a closer examination having 
 been made last spring, it was found that the surface of 
 the shell and other paits presented all the essential 
 chai-acters of a true Siphonotreta (de Verneuil). The 
 specimen is preserved as a mould or cast of the shell, 
 exhibiting the spines all around the outer margin and 
 Hides, and may possibly be a young individual of, or close- 
 ly related to, Siphonotreta Scotica Davidson, a species re- 
 corded by Mr. J. F. Whiteaves in 1883 from the Utica 
 formation in a paper read by him at the Montreal meet- 
 in"-- of the A. A. A. S. Addiiional notes on that species 
 were made by the writer in the "Ottawa Naturalist" 
 for December, 188t, and in Vol. II. No. 3 of the Ottawa 
 Field Naturalists' Club Transactions, No. 1, p. 347. 
 The following notes are taken from the Murray Bay 
 specimen, which is probably the larger value: Dimen- 
 sions as follows -.—Length of the shell, 1*75 millimetres ; 
 breadth, 1*8 millimetres ; length of the setaceous spines 
 in front, "5 millimetre. 
 This minute form agrees very well with the characters 
 such as a young form of Siphonotreta Scotica, Davidson, 
 and its Canadian variety might assume or be expected to 
 have from an examination made of many adult individuals 
 collected in the Utica of Gloucester, near Ottawa, but there 
 is also a very close resemblance between the Murray Bay 
 
 t 
 1 
 
 } 
 
 
 
 s 
 s 
 
 ,1 
 

 Notes on Fossils of Utira Formation. 105 
 
 specimen and the Siphonotreta micnla (loscribed bv Prof. 
 M<!Coy ' from the Llandeilo ,ock8 of Great Britain, and 
 which ho himself roco-nized aftci wards in rocks of similar 
 ago in Australia. i)v. Bigsby, in his "Thesaurus Siluri- 
 ans states tliat S. micnla, McCoy, occurs in Meath, 
 roland, hnglan.l and S. W. Scotland, at Glonkiln, Dum- 
 frieshire, and m several localities in Wales. The Murray 
 Bay specimen diifers f,om S. micnla in having the con- 
 centric lines of growth or struo more distant, thei-e 
 being only twelre in the space of one millimetre, whilst 
 there are are said to seventeen in the same space in the 
 latter. The spines, again, are comparatively longer in the 
 Murray Bay form than in S. Scotica, but much more numer- 
 ous than inS. micnla. They are exceedingly slender and 
 smooth. The speciHc relations of this form require better 
 specimens before definite conclusions are arrived at. 
 
 5. LEPT.KNA SERICEA, Sowerby.-Qnly a fragment of what 
 
 appears to be this ubiquitous and common species oc- 
 curs in the collection. 
 
 6. Orthis TESTCDiNARrA, Dalman, var.-This species of 
 
 Orthis resembles one which is found in tolerable abnn- 
 dtince m the limestones at the foot of the Montmorency 
 Faxis, near Quebec, it is here provisionally referred as 
 a variety of Ort/us testudinaria, though there is good 
 reason for a ditferent specific d signation. The costffi 
 especially about the beak and along the anterioi- 
 margin, ditfer considei-ably as to their arrangement and 
 distribution. 
 
 i 
 
 Cephalopoda. 
 '. Trocholites ammonius, Conrad.-The mode of occur- 
 rence, preservation and characters of the specimen 
 referred to this species agree perfectly with the numer- 
 
 oLw^ ."p ,r'""'"^^ ^^ '^^ ^'"'^ «^^1«« «f Whitby, 
 Ottawa and Colhngwood. 
 
 • British Palaeozoic Fossils, pp. 188 and 189; PI. i H. fig. 3. 
 
Canadian Record of Science. 
 
 106 
 
 8 Endoceras prote.forme, IIall.-A« is usually the caHe, 
 with ,»early uU tho Hpecimens collectod of th-n spo-'ios 
 in tiie Ulica, tho sholU arc flattened und broken show- 
 ing that it was exceedingly thin and hrittlo, There 
 are four cepta in the space of 3-5 centimetres. 
 
 Trilobita and Ostraooda. 
 The trilobites and bivalved crustaceans mentioned in tho 
 list {mpra) have been determined with as much accu- 
 racy as the state of preservation of tho specimens war- 
 rants. When more Hpecimens are obtained, and some 
 more perfect ones than those before me, the relations, 
 both generic and specific, may he changed, and a num- 
 ber of additional species recorded from that ouccrop ot 
 the Utica at Murray Bay. 
 It may not bo deemed out of place here to point out the 
 entire absence of those species of fossils which characterize 
 the so-called Utica shales along the south shore of the bt. 
 Lawrence, and on the northern side of the Island of Orleans. 
 Tho geological horizonindicated by the fossils contamed m 
 this brief note is evidently that of the Utica formation. 
 Nearly every species mentioned occurs in that formation at 
 Ottawa and Whitby, in Ontario; so that the exposures o 
 this formation at Murray Bay may be said to be the most 
 easterly outcrop visible of the Utica on tho north shore ot 
 the St. Lawrence.