MAMMALIA. 745 



asserts that the skull scarcely differs from that of Lichanotm Indris of the 

 same age. 



Stenops Illig. (genera Loris and Nycticebus Geoffr.) Incisor 



teeth -7 , canines . , molars -. — tj . Ears short, rounded. Eyes 



4 1—1 D— b 



large, approximate. Index of hand short, not longer than pollex. 



Tail short or nons. 



The teeth of this genus are 36 in number, and agree as well in this 

 respect as in their arrangement with those of the genera Lemur and Oto- 

 lic7ius. — Formerly the six anterior teeth placed horizontally in the lower 

 jaw were regarded as incisors, and Linn^us gave as a character of his genus 

 Lemur, " denies primores inferiores sex." Of these six teeth the four middle 

 ones are very thin ; the most external on each side is conspicuously thicker. 

 This is now regarded as the inferior canine, since the canine of the upper 

 jaw (about which there can be no doubt, since the intermaxillary suture is 

 seen in front of it), when the mouth is closed, is placed behind this outer- 

 most, just as in monkeys and carnivores. Consequently the tooth, which 

 was commonly regarded as the canine of the lower jaw, is now indicated as 

 the first false molar. 



a) Tail sliort. Index of hand very sJiort, resemhliwj an unarmed 

 tubercle. {Perodicticus Bennett.) 



Sp. Stenops potto, Lemur potto Gm., Nycticebus potto Geoffr. An7i. du Mus. 

 XIX. p. 165, Perodicticus Geoffroyi Benn., Potto Bosman, Beschrijving van 

 de Guinese Goudhust, 1737, 4to, pp. 30, 31, fig. 4 (opposite p. 29), Bennett 

 Proceed of the Zool. Soc. 1830, 1831, Part i. pp. 109 — 1 1 1 ; V. D. Hoeven 

 Tijdschr. XI. bl. 20 — 27, PI. II. (figure of a young individual; its skull is 

 figured ib. PL I. fig. 3) ; Verhand. der eerste Klasse van het Kon. Ned. 

 Instit. 3e Reeks, iv. 1851, (with 2 plates, figure of the adult animal, of the 

 skeleton, the teeth, &c.). The Aposo or Aposou of the negroes on the Gold 

 coast of Guinea is a nocturnal animal which keeps on trees and lives 

 on fruits. The spinous processes of the last five cervical and of the first 

 two dorsal vertebrae are long and pierce through the hairy integument of 

 the back, with a weak, horny covering. Prof. Halbertsma first drew my 

 attention to this peculiarity, which I have observed in two specimens. 



b) Tail very short {Nycticebus Geoffr.). 



Sp. Stenops tardigradus auct., Lemur tardigradus L. (in part), Vosmaer 

 Beschr. van cene tot nu toe onbekende vijfvingerige luijaardsoort, Amsterdam, 

 1770 (with fig.). Buff. Suppl. vii. PI. 36, Audeb. Loris, PI. r, Guer. 

 Iconogr., Mammif. PI. 6, fig. 3 ; yellowish-grey, with black stripe along 

 the middle of back, a narrow whitish stripe between the eyes, 4 incisors 

 above ; Bengal, Siam, Sumati-a, Borneo ; — Stenopts javanicus nob., Nyctice- 

 bus javanicus Geoffr. ; very similar to the preceding, but with only 

 2 incisors in the upper jaw and more white between and above the 

 eyes. 



