é 
67 
Ursus Gray. Myrmarctos Gray. 
Tremarctos Gerv. 
Helarctos Horsf. 
§. 2. 
Melursus Meyer=Prochilus Il. 
Extinct Ursidae ? 
(Family ? Hycenarctidae ?) 
Hyenarctos Cautl. and Fale.=Agriotherium Wagn.=Sivalarctos-+Amphiarcios Blainv. 
‘ ==Hemicyon Lartet. 
XVIII. AELURIDAE. 
Genus. 
Aelurus F. Cuv. /§ 
XIX. CERCOLEPTIDAE. 
Genus. 
Cercoleptes Nliger=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. 
NASUINAE. (A.) 
II. Snout 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. 
B. PROCYONINAE, 
Procyon Storr. 
Procyonidae? of ex‘inct genera. 
Tylodon Gerv. 
Leptarcios Leidy. 
XXI. BASSARIDIDAE. 
Genus. 
Bassaris Licht. 
FISSIPEDIA INCERTAE SEDIS. 
XXII. SIMOCYONIDAE. 
Extinct. 
Simocyon Kaup=Diaphorus Gaudry. 
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