REPORT OF THE DIRECTOR IQII I3I 



GENERAL CONCLrUSIONS 



Coccosteus canadensis is one of the largest species of 

 the genus. It is distinguished from the best known species, 

 C. decipiens of the Old Red Sandstone of Scotland, first, by 

 its larger size, and second, by trivial diilerences in the shapes of 

 several of its plates. It is quite close to Dinichthys hal- 

 ni o de u s (Clarke) of the Marcellus shales of New York. Indeed 

 the latter is very probably to be put back into the genus Coccosteus, 

 in which Doctor Clarke had originally placed it ;^ for its supposed 

 dinichthyid characters listed by Doctor East ran,- when judged by 

 our present knowledge of Coccosteus, are hardly enough to take it 

 out of that genus. The mandibles, upon which Doctor Eastman 

 chiefly based his opinion, seem to me typically coccosteid though 

 poorly preserved. Moreover Dr Burnett Smith has recently shown^ 

 that in this species the laterals and interlaterals of each side are sepa- 

 rate elements, as in Coccosteus, and not a single plate as in 

 Dinichthys. From these facts it appears that Coccosteus 

 halmodeus — not Dinichthys halmodeus — is the 

 correct name of the Marcellus species. 



The coccosteids hitherto recorded from North America are there-" 

 fore the following : 



1 Coccosteus occidentalis Newberry 



2 " canadensis Woodward 



3 ** halmodeus Clarke 



4 '' macromus Cope 



5 " cuyahogae Claypole 



6 " (Protitanichthys) fossatus (Eastman) 



Of these six C. canadensis is the one now represented by 

 the best material. 



II Note on a remarkable specimen of Eusthenopteron foordi 



A remarkable specimen of Eusthenopteron foordi has 



lately been collected by Doctor Clarke in the type locality, Migouasha 



P. Q., Canada, and is preserved in the New York State Museum. 



1 John M. Clarke. New or Rare Species of Fossils from the Horizon of 

 the Livonia Salt Shaft. Thirteenth Ann. Rept. State Geologist, N.Y., 1893, 

 p. 161-80, pi. i-iv. 



2 Devonic Fishes of the New York Formations. N.Y. vState Miis. Memoir 

 10, 1907, p. 126. The synonomy of the species is given there also. 



3 Notes on Some Little-known Fishes from the New York Devonian. 

 Proc. Acad. Nat. Sci. Phila., 1910, p. 661. 



