28 THE AMERICAN MUSEUM JOURNAL 
specimens of 48 others (including three complete mounted 
skeletons), while only 15 species are not represented. 
FIG. 9. UPPER AND LOWER TEETH OF TRICENTES 
Represents the most primitive type of teeth of the Carnivora, with no specialized carnassials, Natural size 
OXYCLANIDZ. 
Types: Chriacus, Tricentes, Deltatherit'um. Upper and lower jaws. 
Small primitive animals with unspecialized teeth resembling those 
of lemurs. Only fragmentary specimens have been found, and but 
little is known about them. They are the most ancient group of the 
Creodonts and appear to have been nearest to the central stock from 
which the other Creodonts and Carnivores are descended. They are 
found only in the Basal Eocene. 
ARCTOCYONIDA. 
Types: Arctocyon, skull (cast); Clenodon, jaws and feet; Anacodon, 
jaws. 
Bear-like omnivorous Creodonts with sharp canine teeth and the 
crowns of the molars flattened and wrinkled on the surface. The 
animal walked on the entire sole of the foot, and had large sharp 
claws like the modern bears. As in all these ancient mammals the 
brain was very small, as can be seen in the skull of Arctocyon. 
PALAONICTIDA. 
Paleonictis, front of skull and jaws. 
This rare and primitive group of Creodonts is thought by 
some authors to be the remote ancestor of the Cat family. It 
is found only in the Lower Eocene. 
