206 Bulletin American Museum of Natural History. [Vol. XVI, 



so far as we can judge by its alveolus. The second and third 

 incisors are equal sized with laterally compressed fangs (Fig. 



V-' m-f r,,2 



Fig. 2g. Olbodotes copei. Type. Am. Mus. No. 2385. A, lateral view, .4', anterior 

 view, of left ramus. 



zgA^ ). This further enables us to determine the single-fanged 



tooth at the edge of the jaw as a canine, an interpretation 

 which is supported by the condition of this long 

 single-fanged tooth, heretofore described as an 

 anterior premolar, in Cynodontomys and Micro- 

 syops. 



With the type of Olbodotes is associated an 

 upper molar tooth (Fig. 29 a) resembling that 

 of Indrodon nialaris in the possession of a 

 prominent mesostyle, and suggesting that 



Indrodon is probably a member of the Mixodectidae. (See 



below.) 



(Sp. 51) Mixodectes pungens Cope. — The well known 



type of this species (No. 3081 Amer. Mus.) shows no evidence 



Fig. iqa. Ol- 

 bodotes copei. 

 Upper molar as- 

 soci a t ed with 

 type. 



Fig. 30. Mixodectes pungens. Type. Am. Mus. Cope, No. 3081. 



of the existence of the reduced lateral incisors seen in Olbodotes 

 and is further distinguished by the variable presence of the 

 second premolar. 



