5 2 Bulletin American Museum of Natural History. [Vol. XIX, 



xipkirostris, having 32 in one maxilla, 35 in the other; 50 

 teeth in the dentary; and 11 in the premaxilla. Another 

 has 32 and 34 teeth in the maxillae, 50 in the dentary, and 13 

 in the premaxilla. However, it is probably better for the 

 present to regard the three species as distinct. 



No. 1 6 14 (Figs. 39, 40) was collected in 1877, in Gove 

 County, Kansas, by Mr. R. Hill, for Professor Cope. It con- 

 sists of both tipper jaws complete; the 

 left palatine complete, or nearly so; the 

 greater part of both lower jaws ; one quad- 

 rate ; and the predentary. The number 

 of the teeth has been stated. The pre- 

 dentary has a length of 55 mm., a vertical 

 diameter of 27 mm. at the base, and a 

 Saurocephaius transvcrsc diameter of 16 mm. It does 

 "i^l'^fit^l'rZ^kx^L not appear to have suffered any crushing. 

 "^■^ '"^^' The premaxilla is represented by Figure 39 



for comparison with that of 5. phlehotomus . 



The palatine has the form represented in Fig. 40, seen 

 from the outside. The mesial sur- 

 face is concave in cross-section. 

 On this surface are seen two con- 

 siderable patches of small teeth, 

 and probably the whole surface was 

 originally furnished with teeth. 

 Attached to the hinder end of the 

 upper border of the maxilla is a 

 supramaxilla. 



No. 2012 has 35 teeth in the 

 maxilla. The predentary is 66 mm. long and 28 mm. high 



Fig. 39- 



Fig. 40. Saurocephalus xipkiros- 

 tris (Stewart). No. 1614. X \. Pala- 

 tine, outer view. 



Saurocephalus goodeanus {Cope). 



Ichthyodectes goodeanus Cope (E. D.), Proc. Amer. Philos. Soc. XVII, 

 1877, p. 176. — Hay (O. p.), Amer. Jour. Sci. (4), VI, 1898, p. 

 227; Bibliog. and Cat. Foss. Vert. N. A. 1902, p. 385. — Wood- 

 ward, (A. S.), Cat. Foss. Fishes, IV. 1901, p. 107. 



In the Cope Collection of fossil fishes has been found Cope's 

 type of his Ichthyodectes goodeanus. It proves to be a species 



