miller] seventy new MALAYAN MAMMALS 3 1 



group, closely similar to Mns siporaiins Thomas, but with rufous of 

 upperparts replaced by dull buff. 



Color. — Type : back and sides a mixture of blackish brown and 

 dull bufF, the former predominating on neck, shoulders, and fore part 

 of back, and completely excluding the buff on lumbar region, rump, 

 and about base of tail, the latter predominating on sides of neck and 

 body, particularly in region of shoulders. Throughout the dorsal 

 surface the hairs are ecru-drab at base. Crown, muzzle, and cheeks 

 to level of lower eyelid glossy brownish black, lower half of cheeks 

 like sides of body but more finely grizzled and somewhat darker. 

 Ears and whiskers black. Outer surface of legs like sides proximally, 

 but soon darkening to blackish brown, a color which covers entire 

 dorsal surface of feet. Underparts whitish cream-buff to base of 

 hairs. A narrow hair-brown median streak 30 mm. in length on 

 lower portion of throat. Chest slightly discolored by a brownish 

 stain. The color of belly extends down inner side of front leg to 

 foot, but on hind leg it is abruptly cut off a little above middle of 

 tibia by the blackish brown of lower half of leg. Tail blackish brown 

 above to middle, whitish throughout terminal half. The under side 

 of the basal half is irregularly marbled with whitish and brown. 



Mammcc. — Mammse 8, four pectoral and four inguinal. 



Fur. — The quality of the fur is as in Mus vociferans, M. sahanus, 

 and their relatives. The flattened, grooved hairs are so numerous 

 as to give the fur a coarse, harsh texture, but they do not resemble 

 bristles. Rump and lumbar region without noticeably elongated 

 hairs. 



Skull and teeth. — The skull resembles that of the members of the 

 sah ami s-z'ocifc vans group, but is distinguishable by its large size, 

 relatively short, wide, incisive foramina, and by the unusually broad, 

 rounded, angular process of the mandible. Teeth as in Mus 

 vociferans, but larger. 



Measureincnts. — External measurements of type: total length, 

 592 ; head and body, 276 ; tail vertebrae, 316 ; hind foot, 53 (50) ; ear 

 from meatus, 24; ear from crown, 18; width of ear, 16. External 

 measurements of an adult female (No. 121,540) from the type 

 locality : total length, 562 ; head and body, 267 ; tail vertebrae, 295 ; 

 hind foot, 52 (49.6). 



Cranial measurements of type : greatest length, 58 ; basal length, 

 50; basilar length, 47; diastema, 15 ; length of incisive foramen, 7.8; 

 combined breadth of incisive foramina, 3.8 ; length of nasals, 23 ; 

 least interorbital breadth, 10; zygomatic breadth, 27; mandible, 32.6; 

 maxillary toothrow (alveoli), 10.2; mandibular toothrow (alveoli), 

 10.2. 



