67 



Ursus Gray. Myrmarctos Gray. 



Tremarc.tos Gerv, 

 Helarctos Horsf. 



§.2. 

 Mel ursus Meyer=Prochilus 111. 



Extinct Ursidae? 

 (Family? Hytcnarctidae?") 

 Uycenarctos Cautl. and Fa.\c.=Ai/riotherium \Y zgn. =Sivalai ctos-\-Amphiarcios Blainv. 

 =Hemicyou Lartet. 



XVIII. AELURIDAE. 



Genus. 

 Aelurus F. Cuv. 



XIX. CERCOLEPTIDAE. 



Genus. 

 Cercoleptes l\\iger=Kinkojou Lac. =Potos Cuv. =Caudivolvulus Desm. 



XX. PROCYONIDAE. 



SUB-FAMILIES. 



I. Snout attenuated. Auditory bulla small, abruptly contracted, flattened 

 forwards and towards the external auditory meatus. Mastoid process little 

 developed, extrorse behind meatus. 



U'ASUINAB. (A.) 



II. Suout comparatively abbreviated. Auditory bulla large, sloping gradu- 

 ally towards the external auditory meatus. Mastoid process enlarged and 

 prolonged downwards. 



PROCYONINAE. (B.) 

 A. NASUINAE. 



Nasua Storr= Coati Lac. 



Procyon Storr. 



Tylodon Gerv. 

 Ltptarctos Leidy. 



Bassarit Licht. 



B. PBOCYONINAE. 



Procyonidae? of extinct genera. 



XXI. BASSARIDIDAE. 



Genus. 



FISSIPEDIA INCERTAE SEDIS. 

 XXII. SIMOCYONIDAE. 

 Extinct. 

 Simocyon K&u$=Diaphorus Gaudry. 



