378 University Geological Survey of Kansas. 



striate externally and has a cutting edge in front. Back of this 

 tooth the bone is more slender than in the species just mentioned, 

 and is very irregular above and behind where it joins the ecto- 

 pterygoid. The ectopterygoid (?) is a long, slender bar of bone, 

 called maxilla by Professor Cope, and is covered below with teeth 

 well separated from each other. These teeth are large in front 

 but become smaller toward the posterior extremity. There is 

 one other tooth-bearing element that I have been unable to lo- 

 cate with any degree of certainty. It is expanded at one end 

 and contracted at the other, long, very thin, and covered with 

 small teeth on one of the edges. There are fragments of sev- 

 eral mandibles which may belong to this species, but as none 

 of them are associated with the palatines their identity as such 

 cannot be ascertained. 



Palatine : Length 35 mm. 



Greatest depth 8 " 



Length of anterior tooth 18 " 



Enchodus parvus. 



JSnchodus parvus Stewart, Kans. Univ. Quart., vol. vii a, p. 192. 



This species is based on the right mandible of a single in- 

 dividual from Gove county, Kansas, the catalogue number of 

 which is 321. It is of about the size of E. shumardibut differs 

 from it in several characters. 



The dentary is very thin and presents nine or ten large teeth 

 on the border above. The first of these is the largest, but this 

 is smaller than in the species just mentioned. The second of 

 these is the smallest, while those following are of about the 

 same size. 



^4^ 



Left dentary of Enchodus parvus, Right dentary of Enchodus amierodus, 



natural size. natural size. 



