miller] seventy new MALAYAN MAMMALS 4 1 



Underparts white, faintly tinged with cream-bnff. Line of demar- 

 kation sharp. Tail and ears uniform dark brown. Feet whitish,, 

 with dusky cloudings on metapodials. Whiskers black. 



Skull and teeth. — The skull differs from that of Chiropodomys 

 glirioides as described and figured by Sclater^ in several important 

 details. Most conspicuous among these is the convexity of the dorsal 

 outline. From tip of nasals to middle of frontals the outline is essen- 

 tially straight, distinctly less convex than in Sclater's figure. From 

 middle of frontals back, however, the convexity is so strong that 

 when the nasals are held in line with those of the figure the inion 

 falls opposite the middle of occipital condyle. Viewed from below 

 the skull differs from that of C. glirioides in the less broadened ante- 

 rior palatine foramina, and narrower, parallel-margined, interptery- 

 goid space. The width of the latter barely equals one-half the length 

 of the anterior palatine foramina, while in C. glirioides, as both de- 

 scribed and figured, it is considerably more than half. Mandible 

 shorter and deeper than that of C. glirioides, the angular process 

 wider and less distinctly marked off from main portion of jaw. 

 Teeth, so far as can be judged from the description and figures, 

 essentially as in C. glirioides. 



Measurements. — Total length, 183; head and body, 81 ; tail ver- 

 tebras, 102; pencil, 4; hind foot, 19 (18) ; ear from meatus, 14.6; ear 

 from crown, 12; width of ear, 10; skull, greatest length, 24; basal 

 length, 20.4; basilar length, 18.6; zygomatic breadth, 14; least inter- 

 orbital breadth, 4.8; greatest breadth of braincase above roots of 

 zygomata, 12 ; diastema, 6.8 ; length of anterior palatine foramen, 

 3.6; breadth of both foramina together, 1.8; greatest width of inter- 

 pterygoid space anteriorly, 1.6; mandible, 14; maxillary toothrow 

 (alveoli), 3.6; mandibular toothrow (alveoli), 3.2. 



Specimens examined. — One, the type. 



Remarks. — This species was first recorded by Modigliani in 1889,^ 

 and has since been mentioned by Thomas.^ Neither writer, how- 

 ever, appears to have examined the skull. Unless the figures pub- 

 lished by Sclater are grossly inaccurate, and there is no reason to 

 suppose that such is the case, the Nias animal is readily distinguish- 

 able from Chiropodomys glirioides. It needs no special comparison 

 with the Bornean forms. 



^Proc. Zool. Soc. London, 1890, p. 533, pi. xlv, figs. 6a and 6h. 

 ^Ann. Mus. Civ. di Storia Nat. di Genova, 2d ser., vii, p. 244. 1889. 

 ^Ibid., X, p. 942, 1892. 



