44 



LEMUKID^. 



I. Either only two upper incisors, or four of unequal size ; 



the inner pair much larger than the outer. Tail 

 present, but very short. Limbs not remarkably 

 slender Nycticebus. 



II. Four small upper incisors of equal size. Tail none. 



Limbs very slender LoKiS. 



The lemurs of the Oriental region afford one of the most 

 remarkable and interesting examples of geographical distribution 

 known. The nearest allies of Nycticehus and Loris are two genera, 

 Perodicticus and Arctocchus, found only in West Africa. Nycti- 

 cebtis has an extensive range east of the Bay of Bengal, but has not 

 been recorded from the Himalayas ; Loris is peculiar to Southern 

 India and Ceylon. 



Genus NYCTICEBUS, Geoffroy, 1812. 



Syn, Stenojjs, y. d. Hoeven. 



Head short ; limbs moderately stout ; body slender ; tail very 

 short ; ears short, rounded, and covered with hair ; eyes large and 

 approximate ; second digit of both hand and foot very short, that 

 of the foot with a long claw, all the other digits with a broad nail. 



Fig. 11. — Skull of Ni/cticebiis tardigradus. 



The skuU is globular behind ; the muzzle produced, but not very 

 narrow anteriorly ; orbits large. The greatest breadth of the skull 

 is across the zygomatic arches. Vertebral formula : C. 7, D. 16-17, 

 L. 6-8, S. 3, C. 11-12. 



Dentition 



1_1 3—3 



W' V^- 3=3' 



When there 



4 "- 4 ' "■ 1— r f "■ 3—3' "• 3— 3* 



are two pairs of upper incisors, the inner are much larger than 

 the outer. The last upper molar has but three weU-developed 

 tubercles, two outer and one inner. 



26. Nycticebus tardigradus. The slow Loris. 



Lemur tardigi-adus, L. Sy.^t. Nat. p. 44 (1700), excl, syn. 

 Nycticebus bengalensis, Oeoffr. Ann. Mus. xix, p. 104 (1812). 



