34 



ALLEN'S NATURALIST'S LIBRARY. 



with close and woolly fur. Head short and round. Eyes 

 large, set close together, and having a gentle expression ; face 

 short and flat ; muzzle less projecting than in Loris ; ears 

 small, rounded, hairy, and nearly buried in the fur; neck short; 

 tail invisible externally. Limbs short; index-finger small, con- 

 taining three bones ; toes remaining spontaneously contracted 

 after death. Top of skull with prominent ciests, globular 

 behind ; facial bones conspicuously projecting in front : 

 orbits large, their inner margins separated from each other 

 by a narrow flat space. Pre-maxillae not produced far in 

 front ; hind border of bony palate not extending backwards 

 beyond the median molar. Of the upper teeth, the inner incisor 

 larger than the outer, one often absent on each side ; canine 

 vertically very long, with a gap between it and the anterior 

 pre-molar ; anterior pre-molar elongate, the posterior differing 

 considerably from the anterior molar, and having a short 

 cusped heel behind ; posterior molar with a three-cusped 

 crown. Teeth of lower jaw agreeing with those in the diag- 

 nosis of the family (supra, p. 24). Vertebrae in dorsal and 

 lumbar regions together 23 or 24. The long flexor muscle of 

 the thumb, so characteristic of the Anthropoid Apes, is present 

 v&Nydicebus. The interlacement of the tendons of the muscles 

 of its foot (according to Huxley and Murie) closely resembles 

 the arrangement in the higher Primates. The long flexor muscle 

 of the toes (flexor longus digitorum) is very large, and has one 

 important origin on the lower end (internal condyle) of the 

 thigh-bone correlated with the powerful grasp of its hind-limbs. 

 The female bears one young at a birth. 



Above, ashy-grey, rather paler below ; more or less silvery 

 on the back, often rufescent on the rump, with the hairs dark 

 ashy at the roots; dorsal stripe from crown to loins chestnut 



