﻿196 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 102 



MEASUREMENTS OF TEETH OF VULPAVUS AUSTRALIS (IN MILLIMETERS) 



Width 



Length trigonid Heel 



Mi-2 11.7 



Ml 6.9 4.5 4.0 



Mo 4.8 3.9 3.3 



Order CONDYLARTHRA 



Famib^ MENISCOTHERIIDAE 



Genus MENISCOTHERIUM Cope 



MENISCOTHERIUM TERRARUBAE Cope 



U.S.X.M. No. 18451, fragment of right mandible with P4-M3 (loc. 

 No. 48FE80) ; U.S.I\I.N. No. 18450, fragment of left mandible Mnth 

 P4-M3 (loc. No. 48FR80). 



The limited material of this form is nniform in size and is larger 

 than the material from Alkalai Creek listed by Granger (1915, p. 359) . 

 On the basis of size the material agrees better with terraru-hae than 

 Avith chi(menH(\ but whether these should receive full specific status 

 or be considered as varieties will not be considered here. 



Although the genus was identified Avith certainty from one 

 locality, it would be premature to attempt any discussion of the 

 paleoecology of the Boysen Reservoir area on the basis of such limited 

 data. 



Family HYOPSODONTIDAE 



Genus HYOPSODUS Leidy 



HYGPSODUS POWELLIANUS Cope 



U.S.N.M. No. 18452, right mandible with V,~^U and right maxilla 

 with P- -^ (loc. No. 48FR75). 



This specimen is referred to H. poiveUiatnts on the basis of size and 

 the position of the mental foramina, both of them lying below P4. The 

 teeth are so badly worn that certain identification is impossible. 



MEASUREMENTS OF TEETH OF HYOPSODUS POWELLIANUS (IN MILLIMETERS) 



Length 



Pi-Ms 23. 5 



Mi-3 18. 5 



P4 5. 



Ml 5. 5 



M. 6. 



M3 7. 



