Ruizomys. 353 
with no perpendicular plate ; occipital plane high, often sloped boldly 
forward ; palate narrow; form cylindrical; eye and ear-conch very 
small, sometimes rudimentary; limbs short and stout; claws large ; 
tail short or absent ” (Adston, ‘ P. Z. S.’ 1876, p. 86). There are two sub- 
families —Spalacine and Bathyergine, 
GENUS RHIZOMYS—THE BAMBOO-RAT. 
“Form robust; eyes very small; ears very short, naked; pollex 
rudimentary ; tail rather short, partially haired ; skull broad; occipital 
plane only slightly sloped forward ; infra-orbital opening small, sub- 
triangular ; upper incisors arched forward ; no premolar; upper molars 
with one deep internal and two or more external enamel-folds; the 
lower molars reversed.” —A/s/on. 
No. 396. RHIZOMYS BADIUS. 
The Chestnut Bamboo-Rat ( Jerdon’s No. 201). 
NativE NamMe.—Known to the Chingpaws or Kakhyens as the 
Yewcron.—Anderson. 
Hapitat.—The Sikim and Nepal Terai; Burmah; Arakan ; Kakhyen 
Hills. 
DeEscrIPTION.—Fine fur, of a grey or slaty grey for two-thirds of the 
basal portion, the remain- 
ing upper third being 
from a deep to a bright 
chestnut. ‘Most intense 
on the head, and dullest 
on the rump” (Azder- 
son). “ Below dark ashy 
grey” (/erdon). “The 
fur of the under-parts in 
these Eastern examples 
of the species ” (referring 
to those from the Kakh- 
yen hills) ‘is paler and 
more reddish than chest- 
nut, whereas in some 
Nepal animals it inclines even to slaty grey, washed with reddish. 
The area immediately around the muzzle and the chin is pale brownish, 
with a tinge of greyish, and the teeth are brilliant reddish, the nose, 
ears, feet, and tail being pale flesh-coloured” (Azderson, ‘ Anat. and 
Zool. Res.’ p. 329). ~ 
Rhizomys badius. 
2A 
