8o Bulletin American Museum of Natural History. [Vol. XIX, 



hinder border has been broken away. It is a rather heavy 

 bone and is ornamented with radiating ridges and grooves. 

 The anterior border has been furnished 

 with a row of about eight sharp processes. 

 It seems to have been overlapped by the 

 hinder border of the lower end of the pre- 

 operculum. 



The upper surface of the head is present, 

 except the snout ; but it is too much over- 

 lain with gypsum to permit accurate des- 

 cription. It resembles the skull of E. 

 faiijasi Agassiz, which is figured by Dr. 

 A. S. Woodward (Cat. Foss. Fishes, IV, 

 pi. xi, fig. 6). A deep and broad exca- 



Fig. 65. Enchodus stsvus . - , .,,,p,,. 



Hay. No. 198. X h- Type, vation runs along the middle oi the head 



z'. (?/>., interoperculum; /. <;/., . . , 



preopercuium. _ from the supraoccipital. 



Stratodus oxypogon Cope. 



Stratodus oxypogon Cope (E. D.), Proc. Amer. Philos. Soc. XVII, 1877, 

 p. 180. — Woodward (A. S.), Cat. Foss. Fishes, IV, 1901, p, 189. 

 — Hay (O. p.), Bibliog. and Cat. Foss. Vert. N. A. 1902, p. 387. 



The type of this species bears the number 21 13. It con- 

 sists of the distal portion of the right dentary (Fig. 66, den.), 

 a portion of what Prof. Cope regarded as a maxilla (Fig. 66, 

 mx.) a piece of a palatine (Fig. 67), and eight vertebrae. Cope 



Fig. 66. Stratodus oxypogon Cope. No. 2113. X i. 

 Type. Jaws, outer view. (^?«., dentary ; 7«j-., maxilla. 



Fig. 67. Stratodus 

 oxypogon Cope. No. 

 2113. X I. Type. Frag- 

 ment of palatine, show- 

 ing teeth. 



has given sufficient description; but no figures have hitherto 

 been furnished of the speciniens. The dentary and maxilla 

 are here shown as seen from the outer side, and the fragment 

 of palatine is represented from the toothed surface. Most of 

 the teeth are pressed against the surface in such a way as to 



