DAKOTA AND NEBRASKA. 



53 



rounded as in the former, and not extended in a somewhat hook-like manner as in 

 the latter. 



The sectorial molar is absolutely broader, nearly as high, but not quite so thick as 

 in the Panther. It also differs from the latter in possessing a strongly developed 

 posterior indented talon, as in the European Lynx, Felis Lynx. 



The first premolar occupied a position about mid-way in the hiatus between the 

 canine tooth and the second premolar. It was a small tooth, inserted by a single 

 fang. The second and third premolars have the same form as in the Panther, but 

 are not so thick in proportion to their height and breadth. 



The inferior canine tooth has the same form and about the same proportions as in 

 the cats generally, but there is no trace of a furrow or narrow groove on the outer 

 surface of the crown. 



The measurements of the specimen, compared with those of a Panther, are as 

 follows : 



Length of the lower jaw from the condyle, 



Height " " " 



" " " coronoid process, 



" " at the middle molar, . 



Space occupied by the three molars. 



Extent of hiatus from canine to large premolars. 



Length of crown of canine, 



Length of crown of first large premolar. 



Breadth " " " 



Thickness " " " 



Length of crown of second large premola 



Breadth " " " 



Thickness « " « 



Length of crown of sectorial molar, 



Breadth " " " 



Thickness " " « 



P. 



intrepidus. 



F. concolor 



Lines. 



Lines. 



. 58 



64 





. 12 



15 





27 



34 





11 



12 





. 21 



22 





7 



5J 





. 10 



12i 





3i 



4 





5i 



6i 





2i 



3i 





5J 



5 





7 



7i 





Si 



4 





. 6 



6 





9J 



8J 





. 4 



4i 



DREPANODON. 



Drepanodon is an extinct genus of feline animals, particularly remarkable from its 

 possessing, in the upper jaw, long sabre-like canine teeth, from which it has received 

 the common name of the Sabre-toothed Tiger. A number of species have been 

 indicated from remains discovered in the middle and later tertiary formations of 

 Western Europe, Greece, the Himalayas of Asia, and Brazil. Among the collection 



