miller] seventy new MALAYAN MAMMALS 2/ 



15.4 mm. from meatus, and 8 mm. from crown. The measurements 

 given in the original description of S. lugens are 21.5 and 20 for an 

 adult male and female respectively. 



Skull and teeth. — So far as can be judged from the description 

 the skull and teeth (pi. i, fig. i) agree with those of Sciuropterus 

 lugens. Audital bullae very broad and flat. 



Measurements. — External measurements of type: total length, 

 485 ; head and body, 265 ; tail vertebrae, 220 ; hind foot, 49 (44) ; ear 

 from meatus, 15.4; ear from crown, 8; width of ear, 7.6. 



Cranial measurements of type : greatest length, 48.8 ; basal length, 

 41.4; basilar length, 38; median palatal length, 22; diastema, 10; 

 length of nasals, 14.8; greatest breadth of both nasals together, 7.8; 

 interorbital breadth, 1 1 ; distance between tips of postorbital pro- 

 cesses, 23 ; zygomatic breadth, 29 ; breadth of braincase above roots 

 of zygomata, 20.6; greatest depth of braincase, 16.4; occipital depth, 

 12; mandible, 29; maxillary .toothrow (alveoli), 10; mandibular 

 toothrow (alveoli), 10. 



Specimens examined. — One, the type. 



Remarks. — While this squirrel is evidently a near ally of the 

 Siporan Sciuropterus lugens, it is readily distinguishable by its 

 smaller ear and less dark color. It needs no comparison with any 

 other species. 



PETAURISTA BATUANA sp. nov. 



(Plate II, figure 3) 



Type. — Adult male (skin and skull). No. 121,742, United States 

 National Museum. Collected on Tana Bala, Batu Islands, Sumatra, 

 February 5, 1903, by Dr. W. L. Abbott. Original number, 2233. 



Characters. — Like Petaurista nitidula of the Natuna Islands, but 

 intermediate in size between this species and the large Javan P. 

 nitida. 



Color. — Type : upperparts deep rufous or ferruginous, a little 

 darkened, particularly along median line, by blackish hair-tips. 

 Upper side of membranes and outer surface of legs burnt-sienna, 

 darkening to black on feet, wrists, ankles, and outer edge of fore- 

 arm. Edge of interfemoral membrane blackish brown. Under- 

 parts and inner surface of thighs and upperarms pale ochraceous- 

 rufous. Chin blackish. On cheeks and muzzle the rufous and 

 ochraceous-buff are mixed together and slightly tinged with gray. 

 Ears rufous internally, black externally. A small blackish area 

 behind ear. Eye ring and area surrounding muzzle and base of 

 whiskers black. Edge of flying membrane dull ochraceous-bufif. 



