1880. | - On the Extinct Cats of America. 841 
Upper; _ Lower Upper : 
Eocene. | Miocene. | Miocene. | Pliocene. 
4 | Eur. | Eur. | Am. Eur. Am. Eur.| Am. 
saij aai — EPR 
Prozlurus julieni Filh : | 
t lemanensis Filh........ So ees ees | X 
Pseudælurus hyzenoides Blv......-..-- atop | x 
oe edvardsi Filh..... sets serra Ce po 
i intrepidus Leidy........-..+--+: | | | Ak 
sivalensis Lydd.........-+++++- | | | X 
Archzelurus debilis Cope.. ......02 see ee eee 
lurogale intermedia Filh. .........+..+++- ES ae | 
S Sacotata PUB. asse oorr -i | | 
Nimravus gomphodus Cope. ........+++++++ | | 
. confertus Cope.....e.sseseeeeeees | 
Dinictis felina Leidy,........c0ceseeeeeeee | 
“+ cyclops 
x 
seer ee eere eer eo ees ete 
| 
sere eetee eres ee ee 
“ce 
XXXXX XXX XXX 
s cerebralis Cope .....-.++-++ By | 
Eusmilus bidentatus Filh. .... E E A a E IGS ee 
We may now consider in more detail the characters of the 
genera and species of North America. 
Division I. The Primitive Cats. 
PsEup& Lurus Gervais. Although this genus commences in 
the Phosphorites of France, which are generally referred to the 
upper Eocene, it has at least some dental characters of the true 
Felide, Even at that early period, if well defined period, 
it be? the premolar teeth are lobed; see P. edvardsi Filhol. 
The single American species, the P. intrepidus Leidy is from a 
late Miocene formation, the Loup Fork. It is only known from 
lower jaws, of which Dr. Hayden procured one in Nebraska, and 
the writer another in Colorado. It was a species with large teeth, 
of about the size of the Canada lynx. 
Division II. The False Sabre-tooths. 
ARcHa&LURUS Cope. : 
This genus is of interest as completing the connection between 
the sabre-tooth and primitive unspecialized groups of the cats, a 
transition also clearly indicated by the genus Memravus, In den- 
1I only know this species by name. | 
*Th Phosphorites are suspected by some to contain mixed materials from differ- 
ent horizons. 
