220 EODENTIA. 



from Assam. The molar row, in the upper jaw, measures only 0""50 to 0""59 in the 

 latter species and the upper incisors also are much narrower. The breadth of 

 the frontal region of S. bicolor is proportionally greater than in S. giganteus, 

 and the upper portion of the nasals is more expanded. No character, as far as I 

 can see, can be drawn from the premaxillary foramina, wliich vary in length. The 

 skull is subject to considerable variation; in two skulls of the pale variety the 

 facial portion of one skull is narrower than the other. The skull of S. epUppium, 

 as figm-ed by Miiller and Schlegel, has a much more pointed muzzle than S. auri- 

 venter, as figured by Is. Geoff., which has also greater antero-orbital breadth 

 and depth : but in these respects the skull of the latter agrees with a skiill 

 removed from an undoubted example of S. ephippium, whereas the skull of a 

 specimen of S. hypoleucus agrees with Miiller and Schlegel's figure of the skull of 

 S. epliippium ! 



This species appears to be generally distributed over the southern portion of 

 the Malayan peninsula and over the neighbouring Islands of Sumatra, Java, Borneo, 

 and the Celebes and the adjacent smaller islands. 



* SciURUS GiaANTEUs, M'Clelland. 



Scinrus ffigantens, M'Clelland, Proe. Zool. Soc. 1839, p. 150. 



Scinrus bicolor, Wagner, Sehreber, Saugeth. Suppl. vol. iii. 1843, p. 191 (in part) ; Blyth, Journ. 

 As. Soc. Beng. vol. x. 1841, p. 919 (in part) ; vol. xvi. 1847, p. 870 (in part) ; vol. xxiv, 1855, 

 p. 472 (in part) ; vol. xxxi. 1862, p. 334 (in part) ; Ann. and Mag. Nat. Hist. vol. xx. 1847, 

 p. 314 (in part) ; Cat. Mamm. As. Soc. Mus. 1863, p. 99 (in part) ; Cantor, Journ. As. Soc. 

 Beng. vol. xvi. 1846, p. 246 (in part) ; Jerdon, Mamm. Ind. 1867, p. 168 (in part). 



Scinrus macruroides, Hodgson, Journ. As. Soc. Beng. vol. x. 1841, p. 915 (not described) ; Cal. 

 Journ. Nat. Hist. vol. iv. 1844, p. 293; Proc. Zool. Soc. Lond. 1853, p. 126; Gray, Hand- 

 List Mamm. B. M. 1843, p. 136; Cat. Mamm. Nepal, B. M. 1846, p. 22; Blytli, Ann. & 

 Mag. Nat. Hist. vol. xx. 1847, p. 314 (in part) ; Horsfield, Proc. Zool. Soc. Lond. 1856, p. 402. 



Macroxus {RuJcaia) hicolor, Gray, Ann. & Mag. Nat. Hist. vol. xx. 3rd ser. 1867, p. 276 (in part). 



This species has well-tufted ears : the upper surface is either wholly black or 

 reddish-brown, without any trace of white ; the tail generally is jet black, also the 

 outside of the fore and hind limbs and the upper surface of the feet. An elongated 

 black spot is almost invarialDly found below the eye from behind the moustache, and 

 the eye is encircled with black. There are generally two black spots on the under 

 surface of the chin. The under parts and the inside of the limbs vary from pale 

 yellowish-white to a rich rufous-orange ; the basal portion of the hairs of the under 

 parts is dark brown, or black, and the ventral area has frequently a dull hue where 

 the yellow tips are sparse. The coats of these squirrels are generally sleek, glossy, 

 and deep black, and while in this condition the under surface is most brilliant, 

 especially at its line of junction with the black, along the sides of the body and 

 limbs tending to form a kind of bright band. In some, the upper parts have a 

 brownish hue, but tliis is not characteristic of any particular locality, as two 

 individuals, one from Nepal and the other from Borneo, are equally bro^mi. When 



