5 
En ydrocyon and LTemnocyon ; postglenoid and postparietal only. 
FIG, 2.—-Temmocyon corypheus Cope, Lower Miocene of Oregon; one-half natu- 
ral size. PP, postparietal foramen, 
Archelurus, Dinictis, Pogonodon, Hoplophoneus and Macherodus (cere- 
bratis) ; postglenoid and postparictal only. ‘ 
Procyon, Nasua and Eassaris ; postglenoid only. 
Canis, Vulpes and Urocyon ; postglenoid only. 
Viverra, Mustela, Putorius and Mephitis ; postglenoid only. 
Felis (domestica) ; sometimes a minute postglenoid only; sometimes none. 
Hyena, Uncia, Cynelurus ; no foramina. 
PROSIMLAS. 
Lemur, Chirogaleus and Turstus ; a postglenoid only. 
QUADRUMANA. 
Hapale ; postglenoid and postsquamosal. 
Cebus ; postglenoid and postparietal. The latter is on the suture of the 
parietal and squamosal bones ; in Hapale penieillata it is entirely within 
the squamosal bones. 
Ateles, Callithrix, Mycetes, Semnopithecus and Cynocephalus ; no for- 
amina. 
Macacus ; a small postglenoid. 
Troglodytes niger, gorilla ; a closed fissure, but no foramen postglenoid- 
eun. — 
Homo ; no foramina in sixteen North American Indians examined of the 
Klamath, Bannock, Crow, Sioux and Cheyenne tribes. One postglenoid on 
one side in a South Australian. One or two mastoids are more usual, be- 
ing found in a good many specimens of all races. They are rarest in Hot- 
tentot negroes. 
CETACEA. 
Balena, Beluga and Monodon ; no foramina. 
SIRENIA. 
Halicore and Manatus ; a huge mastoid only. 
HYRACOIDEA. 
Hyraz ; no foramina. 
PROBOSCIDIA. 
EHlephas ; no foramina. 
