106 KANSAS UNIVERSITY SCIENCE BULLETIN. 



has been bent upward at the cephalic end. The fang is entire, 

 but the other teeth have been broken off. The bases of four 

 of them remain. The fine teeth are very short in this specimen. 



mm. 



Length of tooth border 35 



Greatest depth of the dentary 8 



Length of the dentary fang 4.5 



Length of the fine teeth 0.9 



Figure 7, plate XV, represents specimen No. 323, the larg- 

 est specimen of this species in the collection. Only the ce- 

 phalic end of the dentary is present. Four small teeth occur 

 on the external alveolar border in front of the fang. One is 

 broken, but the remaining three are one-third as long as the 

 fang. 



mm. 



Length of the dentary fang 9 



Length of the teeth in front of the fang 2 



Figure 8, plate XV, shows specimen No. 838, a much 

 smaller palatine, with its fang. The angle that this palatine 

 makes with its fang is 140°. A portion of the pterygoid ad- 

 heres to the caudal end of the palatine. 



^ mm. 

 Length of the palatine fang 4 



Figure 9, plate XV, represents a palatine complete with its 

 fang, which very probably belongs to this species. It is 

 No. 828. The palatine is not quite half as long as the fang. 

 The angle that the palatine makes with the fang is about 150.° 

 It is probably from a young specimen, since the length of the 

 palatine would indicate that the fang had not been replaced 

 many times. 



"^ mm. 



Length of the fang 6 



There is much variation in the size of this species. This 

 is well shown by a comparison of the lengths of the dentary 

 fangs. The lengths of several of these fangs are as follows : 



mm. 



Fig. 4, specimen No. 321 2.5 



Pig. 3, specimen No. 824 3 



Fig. 6, specimen No. 826 4.5 



Fig. 1, specimen No. 829 6 



Fig. 5, specimen No. 825 " 7 



Fig. 7, specimen No. 323 9 



The generic names designated in the bibliography are now 

 generally considered to be synonymous. They are thus given 



