N0.12C9. ANDAMAN AND NICOBAR MAMMALS— MILL E/c. 763 
Fur. — The fur is like that of Mufi stoiciis, except that the bristles 
are a little less stiff and the under fur is somewhat more woolly. The 
long- terete hairs on the back are less noticeable than in the larger 
animal. In abundance and distribution the bristles are essentially the 
same in the two species. 
Color. — Back and sides essential!}" as in Mus stoicus^ except that the 
light element oi the grizzle is paler, almost exactly matching- the 
'ochi-aceous buff' of Ridgway, and a little more noticeably in excess of 
the dark. The fur is nearly destitute of the lustrous sheen so notice- 
able in the larger animal. Muzzle and outer surface of front legs 
washed with broccoli-brown. Under parts and inner surface of limbs 
cream buff'. Under fur light drab. Ears and tail dull brown through- 
out. The color of the under parts completed encircles the mouth, 
but scarcely spreads upward on cheeks. Feet more thickly haired 
than in J/^/x xtoicm^ cream buff' heavily clouded with dral). Whiskers 
black. A faintly indicated dark eye-ring. 
Tail. — The annulation of the tail is similar to that in Mm stoicus, 
except that the rings and scales are more sharply detined. At middle 
there are 10 rings to the centimeter. The hairs, though not conspic- 
uous, are longer and more abundant than in the larger animal. 
Mammce. — There are 10 mammae, 2 pectoral and 3 inguinal on each 
side. 
Feet. — The feet are in no way peculiar. Soles naked, with 6 well- 
developed tubercles. 
Ears. — The ears are essentially as in Mus stoicus. 
Skull. — The skull of Mus' fleUlis resembles that of the larger mem- 
bers of the Mus rattus group, but is readily distinguishal)le by its 
larger audital bulla? and more strongly developed supraorbital ridges. 
In the latter character it suggests Mus surifer and its allies. As com- 
pared with the skull of Mus panuoxus that of MusjlehiUK differs, aside 
from the characters just mentioned, in slightl}" smaller size, relativel}^ 
shorter, more robust rostrum, narrower outer wall of antorbital fora- 
men, more abruptly flaring zygomata, and longer incisive foramina. 
The mandible is essentially the same in both species. Its much greater 
size (greatest length about 45 mm. instead .of about 40) immediately 
distinguishes the skull of Mus flebiUs from that of Mus rattus and 
2rus ale,iandi'in us. 
Teeth.— The teeth exactly resemble those of Mus alexandrinus and 
Mas rattus in form and in pattern of enamel folding, but are conspicu- 
ously larger. In the latter character the}- are slightly surpassed by 
those of Mus pannosus. 
Measurements. — External measurements of type: Total length, 452 
mm.; head and body, 210; tail, 242; hindfoot, 41.4 (39); ear from 
meatus, 21; ear from crown, 16; width of ear, 15. Average of 6 
adults from the type locality: Total length, 441 (417-460); head and 
