THE POTTOS. 27 



molars have their crowns four-cusped and are nearly equal in 

 length ; the crown of the posterior molar is 4-5-cusped, and has 

 a ridge joining its anterior heel to its front outer cusp. Trans- 

 verse and oblique ridges are well marked on the crowns of 

 both the upper and lower cheek-teeth. 



I. THE CALABAR POTTO. PERODICTICUS CALABARENSIS. 



Perodicticus calabarensis, Smith, Proc. Roy. Phys. Soc., Edinb., 



1860, p. 172, figs, i, 2. 

 Arctocebus calabarensis, J. E. Gray, P. Z. S., 1863, p. 150; 



Huxley, P. Z. S., p. 314, pi. 28 (1864). 

 Nycticebus calabarensis, Schlegel, Mus. Pays Bas, vii., p. 287 



(1876). 



Characters. Hair long, wool-like ; face, hands, and feet thinly 

 rv 



Fig. 7. Hand and Foot of P. calabarensh (after Huxley, P. Z. S., 

 1864, p. 319). 



haired. Head 2^ inches long, tapering in front ; muzzle pro- 

 minent and blunt ; ears large, pointed, and projecting above 

 the level of the head, with short hairs, two lamellae inside, 

 and marginal tufts ; neck short ; hind-limbs slightly larger and 



