20G On neio Mammals from the Andanians. 



Hub. Georgetown, Pinang. 



Type. Adult male. B.M. no. 98. 8. 3. .5, Collected and 

 presented by Capt. S. S. Flower. Another specimen obtained 

 by Dr. Cantor. 



Both Dr. Cantor in 1845 and Capt. Flower half a century 

 later obtained in the little island of Pinang examples repre- 

 senting two speeies of this genus, a large and a small. The 

 former marked both his specimens as " il/»s5e///e>-/' evidently 

 taking them for the same species, but there cannot be the 

 slightest doubt that they are quite distinct animals, their 

 difference in size being far too great to be due to individual 

 variation. 



Mus Rogersi, sp. n. 



A spinous-haired species with 1 — 3 = 8 mammae. 



Size of Mus norvcgicus. Fur coarse, profusely mixed with 

 spines, which on the back are about 16 mm. in length by 0'4 

 mm. in breadth. General colour coarsely grizzled ochraceous 

 brown, the bases of both hairs and spines pale grey, the tips 

 of the spines black and of the ordinary hairs ochraceous. 

 The few long bristle-hairs are wholly black. Sides greyer. 

 Under surface not sharply defined, pale buffy greyish, the 

 hairs pale slaty at base, dull cream-buff terminally. Ears 

 finely haired, dark grey. Limbs dark grey externally, light 

 grey like belly along their inner aspect. Hands and feet 

 white above, the metapodials sliglitly darker; filth hind toe, 

 without claw, reaching to the end of the first phalanx of the 

 fourth. Tail rather shorter than head and body, almost 

 naked; rings of scales about 10 to the centimetre; dark 

 brown above, whitish flesh-colour below. Mammaj 1 — 3 = 8. 



Skull strongly built, with well-marked supraorbital beads, 

 which are continued across the parietals to the corners of the 

 interparietals. Muzzle rather narrow, parallel-sided. Palatal 

 foramina not reaching back to the level of the molars. 

 Mesoptcrygoid fossa broadly rounded in front, its anterior 

 limb slightly anterior to the front end of the parapterygoid 

 fossge on each side of it. Bul!i3e of medium size. Molars 

 small in proportion to the general size. 



Dimensions of the type (measured on the Sj)irit-specimen 

 before skinning) : — 



Head and body 195 mm.; tail 188; hind foot (s. u.) 41; 

 ear 28. 



Skull: greatest length 48*5 ; basilar length 40; zygomatic 

 breadtli 22-5; nasals 18x5; interorbital breadth 7-2; 

 greatest separation of parietal ridges IG; palatilar length 



