846 On the Extinct Cats of America. [ December, 
formation in Nebraska and Colorado. They principally belong 
to the longest known and typical species, D. felina Leidy. Speci- 
mens are much less numerous in the Truckee beds of Oregon. 
Two species have been obtained from the former horizon, the 
D. felina and D. squalidens, and one from the latter, the D. cyclops. 
Dinictis cyclops Cope. 
This cat is represented by a perfect cranium with its mandible, 
which lacks only the posterior portions. The dentition is com- 
i 
ee cease 
w ANNS ENIESTRWLA ee 
Fic. 8.—Dinictis cyclops, one-half natural size. Mus. Cope. From Vol. IV, U. S. 
eol. Surv. Terrs. 
plete, excepting the posterior parts of the two inferior sectorials, 
-and the apices of the canines and incisors. The condition of the 
specimen allows its characters to be seen with clearness. The 
species was as large as the fully grown Canada lynx. Although 
of an inferior position in the system of Carnivora, its powers of 
destruction must have excelled those of the catamount. While 
the skull is generally less robust, its sectorial teeth are not smaller 
nor less effective than those of that animal, and the canines far 
excel those of the living species, as instruments for cutting their 
prey. 
Dinictis felina Leidy. 
This species is known from a number of crania and jaws. The 
former differ in their proportions from those of the D. cyclops, 
having a relatively longer cerebral and shorter facial part of ine 
skull. The anterior premolar teeth, especially in the upper Jaw, 
were stronger than those of D. cyclops. 
