26 CATALOG OF FOSSIL FISHES IN THE MUSEUM 



I 



E 1866 Fragment of a cranium with stellate tubercles and showing 

 a sensory canal. 

 Other data same as preceding. 



E 1870 Uncrushed cranium, in inner view. This specimen shows 

 considerable arching of the cranium; greatest width 

 (across marginals) 16.5 cm., greatest depth 5 cm. The 

 head of Macropetahchthys was, therefore, nearly one- 

 third as deep as wide. 



Onondaga limestone; Leroy, N. Y. Collected by F. 

 Mixer. 



E 1871 Large cranium, in top view, denuded of ornamentation; in 

 counterpart. 



Onondaga limestone; Marblehead, Ottawa County, 

 Ohio. 



III. Arthrodira 



Coccosteus decipiens Agassiz 



E 2372 Portions of two individuals showing various head and body 

 plates, the so-called pelvic basipterygia, and the dorsal 

 fin-supports. 



Middle Old Red Sandstone; Sandwick, near Strom- 

 ness, Orkneys. 



Coccosteus canadensis Woodward 

 (PI. 5, figs. 1-3) 



This is the best known of the five or six American species of Coccos- 

 teus, an almost complete specimen having been described within the 

 past few years by Hussakof ." The species is rather rare only one or 

 two plates usually being found in the course of several weeks collecting 

 at the type locality. It is a great satisfaction to the authors to be 

 able to describe a noteworthy specimen, collected by Mr. Bryant in 

 August, 191 5. This specimen displays the upper dentition, which is 

 shown for the first time so clearly in a specimen of Coccosteus. 



li Notes on Devonic fishes from Scaumenac Bay, Quebec. N. Y. Slate Mus., Bull. No. 158, 127- 

 139, pis. 1-3 and 6 figs., 1912. 



