118 



While the original notice of Sinopa rapax was in print, in the Proceedings 

 of Ihe Academy of Natural Sciences of Philadelphia, Professor Marsh pul)- 

 lished a description, in the American Journal of Science for 1871, of some 

 remains of a carnivore from the vicinity of Fort Bridger, under the name of 

 Vulpavus palustris. It is characterized from several upper molars which accord 

 in size sufficiently to pertain to the same animal as that above described. 

 Further researches may prove the two animals to be the same. 



Sinopa eximia. 



A jaw-fragment, discovered by Dr. Carter at Grizzly Buttes, and repre- 

 sented in Fig. 45, Plate VI, belongs to a smaller carnivore than the preced- 

 ing. It was probably allied to the former, and may perhaps pertain to a 

 smaller species of the same genus, of which I have some doul)t, though, in 

 the absence of more confirmatory evidence, I have considered it as such. 



The specimen contains two teeth, which sufficiently resemble those re- 

 tained in the jaw-fragment referred to Sinopa rapax, as to render it probable 

 they are the corresponding ones, though the contiguity of the symphysis leads 

 me to suspect that they may be the last two premolars. As seen in the 

 figure, the back of the symphysis is just below the position in advance of 

 the first tooth of the specimen. The teeth in shape are nearly like those in 

 Sinopa rapax, but the proportions are reversed. The crowns of the two 

 teeth have the same length, but the hinder one is wider and thicker. 



The measurements of the specimen are as follows : 



Lines. 



Depth of the jaw below the teeth 4| 



Space occupied by the two teeth 4J 



Width of the crown of the first tooth 2 



Length of the crown of the first tooth 2:^ 



Width of the crown of the second tooth 2J 



Length of the crown of the second tooth 2^ 



UINTACYON. 



UlNTACYON EDAX. 



An interesting fossil, recently received from Dr. Carter and discovered by 

 him in the Bridger beds, consists of the greater portion of the right ramus of 

 a lower jaw, represented in Fig. 6, Plate XXVII. The specimen indicates 

 a carnivorous animal, probably marsupial, and of a hillierto unknown genns, 

 for which the above name has been proposed. 



