THE POTTOS. 27 



molars have their crowns four-ciispcd 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 CALAEARENSIS. 



Perodictiais calabarensis^ Smith, Proc. Roy. Phys. Soc, Edinb., 



i860, p. 172, figs. T, 2. 

 Ardocebus calabaf-ensis^ J. E. Gray, P. Z. S., 1863, p. 150; 



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

 Nycticehus calaba7'ensis, Schlegel, Mus. Pays Bas, vii., p. 287 



(1876). 

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



Fig. 7. Hand and Foot oi P. calabarensis (after Huxley, P. Z. S., 



1864, p. 319). 



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

 minent and blunt ; ears larc e, pointed, and projecting above 

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

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



