THE POTTOS. 27 



molars have their crowns four-cusptd 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. 



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



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

 Ardocebus calabarensis, J. E. Gray, P. Z. S., 1863, P- 150; 



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

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



(1876). 



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



TV 



I'ig. 7. 



Hand and Foot of P. calabarensis (after Huxley, P. Z. S., 

 1864, p. 319). 



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

 minent and blunt ; ears lar^e, 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 



