﻿186 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loa 



SYSTEMATIC DESCRIPTION OF FOSSIL VERTEBRATES 



Class REPTILIA 



Order SQUAMATA 



Suborder Serpentes 



Family BOIDAE 



Genus BOAVUS Marsh 



BOAVUS cf. OCCIDENTALIS Marsh 



About 30 associated thoracic vertebrae (loc. No. 48FE78) ; ^ 2 

 thoracic vertebrae (loc. No. 48FR80). 



x\lthough there is considerable difference in size between the two 

 specimens, I am inclined to be extremely cautious about differenti- 

 ating species of snakes on the size of the vertebrae only, since age is not 

 readily reflected in the surface texture of the bone. Consequently, the 

 principal importance of this material is the presence of this genus in 

 the Lost Cabin f aunal zone of the Wind River formation. 



Suborder Sauria 



Family VARANIDAE 



Genus SANIWA Leidy 



SANIWA sp. 



One dorsal and five caudal vertebrae (loc. No. 48FR65) ; two dorsal 

 vertebrae of presumably a young individual (loc. No. 48FR78) ; one 

 caudal vertebra (loc. No. 48FR80). 



This material is too imperfect for more than generic identification 

 and its value is only that it establishes this genus in these deposits. 



Family ANGUIDAE 



Genus GLYPTOSAURUS Marsh 



GLYPTOSAURUS DONOHOEI, new species 



Figure 75 



Type.—U.S.l^M. No. 1831G (fig. 75), a badly damaged skull lack- 

 ing the tip of the snout, both maxillae, and the right temporal region 

 (loc.No.48FR65). 



Referred materml. — U.S.N.M, No. 18317, skull and jaw fragments 

 with scutes (loc. No. 48FR65). 



^ For a description of localities see pp. 203-206. 



