50 i Oil new Mammals from the Johore Archipelago. 



Aleasuremenfs. — Collectors^ external measurements of type 

 (taken in the flesh) : — 



Head and body 220 (208^) mm. ; tail 175 (180) ; hind 

 foot 42 (13) ; ear — (23). 



Cranial measurements : greatest length 48*0 (48*0) ; basal 

 leno-th 42-3 (12); palatal length 222 {22) ; length of nasals 

 19-0 (20-7) ; greatest breadth of combined nasals 4-9 (5-3) ; 

 shortest distance between tips of nasals and lachrymal notch 

 19-8 (19-2) ; diastema 14-0 (14-0) ; upper molar row 7-1 

 (7*4) ; length of palatal foramina 7-9 (7*0) ; breadth of 

 combined foramina 4-1 (3"9) ; zygomatic breadth 20'9 (21*5) ; 

 cranial breadth 17-0 (17*2) ; depth of rostrum at anterior 

 extremity of palatal foramina 9*0 (9-1) ; breadth of rostrum 

 midway between henselion and palatal foramina 6'3 (7-4), 



Specimens examined. — Thirteen skins and skulls and one 

 additional skull, all from the type locality. 



Remarks. — From E. surifer microdon'\ (Kloss) from 

 Tioman this race differs mainly in its more heavily built 

 skull, the teeth not reduced in size, and in the absence 

 of a buff gorget across the throat. In E. s. microdon also 

 the white of the under surface is, as a rule, broadly separated 

 from the ankles by the buff of the thighs. 



Epimys surifer aoris, subsp. n. 



Type. — Adult male (skin and skull). No. 445/12, Selangor 

 IMuseum, collected on Pulau Aor, Johore Archipelago, South 

 China Sea, 15th June, 1912, by H. C. Kobinson and 

 E. Seimund. Original no. 4947. 



Characters. — Very similar to the preceding race and with 

 a similiarly robust skull, but colour decidedly less intense. 

 Head rather darker. Anterior margin of infraorbital plate 

 almost vertical ; nasals broader, the anterior margin much 

 less receding. 



Colour. — Mingled black and ochraceous buff, hardly 

 brighter on the flanks than elsewhere, but pelage of all the 

 adult specimens somewhat abraded. Top of head, muzzle, 

 and patches round the eyes darker brown than in the allied 

 forms. No whitish patch at the roots of the vibrissa. 

 White of the under surface continued as a more or less ill- 

 defined line to the wrists and ankles. 



Skull and teeth. — Skull generally similar to that of 

 E. s. pemangilis, with the differences noted above. Outline 



* Measurements in parentheses those of the type of Mus surifer 

 flfivigrandis. 



t Journ. Fed. Malay States Mus. ii. p. 145 (1908). 



