the Marsh Collection. 



401 



between inferior I3 and Ci. The caniniform P of the 

 present form would seem to imply such an inferior dias- 

 tema as in Oxydactyliis. The canine is a well developed 

 recurved cone. P^ is two-rooted, compressed laterally, 

 crown not preserved, but apparently less caniniform, 

 separated from the adjacent teeth by diastemata of 

 somewhat similar extent. The premaxillaries are pro- 

 longed backward, forming a premaxillo-nasal contact of 

 considerable extent. 



/0884, TYPE 

 Y. p. M. 



Fig. 5, — Taratyloyus wortmani, sp, nov. Holotype. Eight lateral aspect 

 of muzzle. Nat. size. 



Measurements. 



mm. 



I^, ant. -post, diameter 7.5 



I^, transverse diameter 5.0 



C, ant. -post, diameter at base 9.3 



C, transverse diameter 6.8 



P^, ant.-post. diameter of roots 8.7 



P^, transverse diameter of roots 3.5 



Diastema I-C 12.0 



Diastema C-P^ 17.4 



Diastema P^-P- 22.4 



Of cervical vertebrae, there are present the atlas, and an 

 entire cervical V, to which are articulated nearly half each 

 of cervicals IV and VI. These bones, while somewhat 

 more primitive, resemble those of Oxydactyliis longipes 

 Peterson, although differing in dimensions, as the compar- 

 ative measurements show. 



