neio Bornean Mammalia. 345 



Tlal. Sadong, Sarawak. Coll. A. R. Wallace, Esq. 

 A second specimen from the same place agrees with the 

 tjpe in every respect. 



Chiropodomys pusilluSy sp. n. 



Size smaller than in Ch. gliroides. Ears and feet deci- 

 dedly smaller and tail siiorter than in that species. Fur 

 crisp, close and velvety. General colour tawny fawn, head 

 and centre of back darker, sides paler, outer sides of arms 

 and legs like back, but the wrists and ankles greyish, a 

 colour which also extends upon the metatarsus ; fingers and 

 toes white; under surface from chin to anus pure white; no 

 darker markings on face ; ears small, evenly oval, practically 

 naked. Tail but little longer than the head and body com- 

 bined, uniformly brown above and below, its terminal tuft of 

 hairs of about the same thickness, but less extended and 

 commencing more abruptly than in the allied species. 



Skull smaller and rather more delicately built than in the 

 other species and showing even more markedly the roundness, 

 simulating immaturity, characteristic of the genus; supra- 

 orbital bead but slightly developed ; anterior palatine fora- 

 mina very short. Molars small, their structure as usual. 



Measurements of the type (skin) : — 



Head and body 76 millim. ; tail 81 ; hind foot loS ; heel 

 to front of last foot-pad 7*2 ; ear from notch 11 '5. 



Skull: upper length 22*2 ; breadth of brain-case 11*6 j 

 nasals, length 7'2 ; interorbital breadth 4*2; interparietal, 

 length 4*2, breadth 9*2 ; anterior zygoma-root 2*1 ; diastema 

 6*2; anterior palatine foramina 2*7; combined lengths of — 

 and ^ (5lii^ is unfortunately lost) 25 ; length of lower molar 

 series 3*1. 



Hah. Mount Kina Balu, 1000 feet. 



This species is founded on the specimen referred by me ia 

 1889 * to Ch. gliroides, a reference mainly induced by the 

 peculiar rounded and immature appearance of the skull ; but 

 this appearance has since proved to be a characteristic of the 

 whole genus, and an examination of the teeth shows that 

 the specimen is after all fairly adult. This being the case, 

 the marked differences in the dimensions of the ears, feet, and 

 tail will readily distinguish it from the older known species. 



* r. Z. S. 1889, p. 235. 



