NO. 2100. RACCOONS AND THEIR ALLIES— HOLLISTER. 149 



Genus BASSARICYON Allen. 

 1876. Bassaricyon Allen, Proc. Acad. Nat. Sci., Philadelphia, 187G, p. 20. 



Type. — Bassaricyon gabbii Allen. 



CTiaracters. — Form elongated, head flattened, muzzle pointed; 

 ears rather small, rounded; tail longer than head and body; posterior 

 half of soles of feet furred; toes semipalmate; claws short, sharply 

 curved and sharply pointed; os penis small, 32 mm. in length, 

 slightly bowed, and much less distinctly bilobed anteriorly than in 

 Procyon or Ewprocyon. The general external appearance of the 

 animal is remarkably like that of Potos. The best distinguishing 

 external characters are the gray face and the less fully haired, less 

 tapering, taU of Bassaricyon. 



Skull short and broad; brain case much as in Procyon, but con- 

 siderably smaller; rostral portion depressed as in Nasua and Nas- 

 uella, but much shorter; postorbital processes well developed from 

 frontals and zygomata; orbits large; temporal ridges never forming 

 a sagittal crest. Palate flat, with shallow lateral grooves, and ex- 

 tending well backward; vomer not attached to palatal bones; 

 posterior half of audital bullae greatly inflated, anterior half low and 

 flattened; tube of external auditory meatus very short. Mandible 

 Ught, the ascending ramus long and high. 



Dental formula: i :^c~ pm - m-- = 40. 



Teeth somewhat larger than in Nasuella, the large cheek-teeth low 

 crowned and only shghtly cusped; teeth closely set, incisors all in 

 contact and the upper cheek teeth uninterrupted from canine to m^. 

 Lower incisors nearly normal, not produced forward as in Nasuella. 

 Canines comparatively large, not excessively flattened; the upper 

 pair nearly straight and not outwardly bowed. Premolars almost 

 exactly as in Nasuella, but less compressed laterally. First upper 

 molar somewhat larger than second; each with three low, rounded 

 cusps, and well developed outer cingulum. (Plate 39.) 



Genus POTOS Geoffroy and Cuvier. 



1795. Potos Geoffroy and Cuvier, Mag. Enc, 1795, vol. 2, p. 187. 



1799. Kinkajou LaciSpede, Tabl. Mamm., p. 7. 



1805. Caudivolvulus Dumeril, Zool. Analyt., p. 14 (1806). 



1811. Cercoleptes Illiger, Prodr. Syst. Mamm., p. 127. 



1813. Kinkaschu Fischer, Zoognosia., ed. 3, vol. 1, p. 14. 



1815. Aesurus Rapinesque, Analyse Nat., p. 59. 



1899. Mamcercolepteus HnRRERA, Sin. Vulg. Cient. Vert. Mexicanos, p. 19. 



Type. — Viverra caudivolvula Schreber. 



Characters . — Form elongated; head rounded, muzzle pointed; 

 tail very long, prehensile; ears short; posterior half of soles densely 



