78 Miscellaneous. 
simple distal articulation, still remain, however, to show an excep- 
tion to this generalization. 
The Condylarthra are distributed as follows :— 
PHENACODONTID&. 
Puerco. Wasatch. 
FAMIAC OCONEE nen sree 
IPINGMACOEINS 4 osca5ecces0nc 2 
IProtogoniawnie. ties eens il 
ipantolambday see eee 1 
Cerrmluleswss socbocoseoaod5 3 
AIHISONChHUSHE Re eee 1 
la ly MOCO 5 55.523 5canauce 3 
PReriptychis cece ea aL 
MENISCOTHERIID2:. 
Meniscotherium .......... 3 
The genera of Phenacodontide are distinguished as follows :-— 
I. Fourth superior and inferior premolars with an 
internal cusp. 
Last superior premolars with two external cusps; 
inferior molars with well-developed cusps .. 
Inferior molars with flat grinding faces ; no cusps. 
Last superior premolar with but one external cusp ; 
inferior molars with V’s...... SoG hue MORO 
Inferior premolars consisting of an anterior V and 
a posterior longitudinal crest.............. 
I. Fourth superior premolar with a high internal 
1 
8 
Phenacodus. 
Anacodon. 
Protogonia, 
Pantolambda. 
cingulum concentric with the single external ° 
Cusp. - 
a, Sapener molars with intermediate tubercles ; 
fourth premolars with internal cusps. 
Posterior inner tubercles of the superior molars 
not cut off; several superior premolars with 
internal cingulum Se RID SBA Rea 
aa. Superior molars with. intermediate tubercles 
forming branches of a V with the anterior 
inner ; “posterior inner distinct and cut off by 
a groove; inferior premolars without inner 
cusps; first inferior true molar tubercular. 
Third superes premolar with elevated internal 
crest . SoouudodOnGabUODD ODED OODGONUOS 
Third superior premolar a cone without inner 
ORES) GO GOm DGS COM GOU EDU oaaS OOO Sas 
aaa, Superior molars unknown; inferior true molars 
with anterior lobe; the first with a trans- 
verse heel instead of opposite tubercles. 
Anterior external lobe of inferior molars forming 
a-cuiting ede. cele apatite on sleneso nee 
Catathleus. 
Amsonchus. 
Haploconus. 
Periptychus. 
oT 
<I ) eT 
