Cope.] 460 LF eb.6, 



Mustela, Putorius, Mephitis; Oanis. Vulpes, Urocyon; Viverra. 

 Procyon, Nasua, Bassaris. 

 Traguhis. 

 aaa- Enormous. 



Lagostomus and Geomys. 



III. Subsquamosal only. 



Phascolnrctos. 



IV. Postsquamosal only. 



Ornithorhyncus, Tamandua, Blarina, Condylura, Scalops. 

 V. Postparietal only. 

 Bhinocerus, Aphelops. 

 VI. Mastoid only. 



ILiUcore, Manntnx. 

 VII. Postglenoid and subsquamosal only. 



Hystrix, Hydrochozrus, Capromys, Ccelogenys, Sciurus, Haplo- 

 dontia, Neotoma, Hesperomgs, Mus, Arvicola. 

 VIII. Postglenoid and postsquamosal only. 

 Erinaceus. 



Macropus, Hypsiprymnus. 

 Hapale. 

 IX. Postglenoid and postparietal. 

 Chiroptera sp. 

 Temnocyon, Enhydroeyon ; 



Archcelurus, Dinictis, Pogonodon, Hoplophoneus, Machmrodus. 

 Cebus. 

 X. Mastoid and postparietal. 

 «. Mastoid small. 

 Oreodon. 

 aw Mastoid enormous. 



Tapirus. 

 XI. Mastoid, postglenoid and postsquamosal. 



Castor, Cynomys, Spermophilus. 

 XII. Mastoid, postglenoid and subsquamosal. 

 Dasyurus, Didelphys. 



XIII. Mastoid, postglenoid and postparietal. < 



Scotophilus (fuscus). 



Gentetes. 



llyienodon. I'rsus, Arctotherium ; 



XIV. Supraglenoid and postsquamosal only. 



Phascolomys. 

 XV. Supraglenoid and postglenoid only. 



Bos. 

 XVI. Supraglenoid, postglenoid and mastoid. 

 Procamelus, Camelus, Auchcnia. 

 XVII. Supraglenoid, postglenoid, mastoid, postparietal. 

 a. Supraglenoid small. 

 Poebrotherium. 



