* GEOLOGICAL SURVEY OF THE TERRITORIES. 355 



Lizards, also, like the iguanas and monitors, existed in the old Wyo- 

 ming fauna. Five species of two peculiar genera have been indicated. 

 Most of them were inclosed in a bony armor of beautifully ornamented 

 scales, reminding one of those of the Armadillo. 



Serpents, too, appear to have been abundant, most of them of the 

 constricting kind, like the South American boas of to-day, but compar- 

 atively like most of the other animals of the old Wyoming fauna, of 

 small size. Prof. Marsh has collected remains of snakes, which he 

 refers to no less than live species of three previously undescribed genera. 



Some of the shales of Green Kiver teem with vrell-preserved" fishes, 

 sometimes appearing as if whole shoals had been suddenly enshrined 

 for the contemplation of future ages. Seven species have been indicated, 

 of which two belong to the same genus as our Herring. Another species 

 belongs to a genus now existing in South America and Borneo. The 

 others belong to two peculiar genera, described by Prof. Cope. Ee- 

 mains of ganoid fishes are likewise abundant in the Green Eiver 

 Tertiary basin. Some of these Prof. Marsh has referred to four species 

 of the same genera as our Bony Gar and southern Mud-fish. 



MAMMALS. 

 CARNIYORA. • 



Of carnivorous mammals, a number of remains have been obtained 

 from the Tertiary formation of Wyoming, but generally in so imperfect 

 a condition that their exact relationship has not been ascertained. 



. Patriofelis. 



Fatriofelis uUa. 



An animal to which this name has been assigned was inferred from 

 portions of a lower jaw, obtained by Prof. Hay den in the vicinity 

 of Fort Bridger in 1869. Tt was larger than our living Panther, and 

 was apparently related with this and the canine family. The lower jaw 

 contains five molar teeth, immediately succeeding the large canine 

 without a conspicuous interval, as in some of the weasels and civets. 

 A large premolar tooth, probably of the same animal, was obtained 

 near the same locality as the former specimens. 



SiNOPA. 



Sinopa rapax. 



This name has been given to a smaller carnivorous animal, indicated 

 by a lower jaw fragment with two teeth, discovered in the vicinity of 

 Fort Bridger by Dr. J. Yan A. Carter, and obligingly sent to the writer 

 the last spring. The animal was about the size of the Gray Fox, and 

 appears to have been intermediate in its position to the weasels and 

 the canine family. 



The teeth in the specimen appear to be the last premolar and the 

 succeeding sectorial molar. The former is larger than the latter and 

 exceeds that of the Gray Fox. The principle cusp exhibits a denticle 

 on its back border, but feebly developed in comparison with that in a 

 similar position in the animal just named. The heel of the crown has 

 an acute edge, from which it slopes to the basal ridge. 



The crown of the sectorial tooth has the same general form as in the 

 corresponding tooth of the Fox and Weasel. The fore part is propor- 

 tionately less well developed than in the former: and the inner cusp is 



