miller] seventy new MALAYAN MAMMALS 65 



of the skins shows any very close approach to the blackish hues of 

 Preshytes natuncc. 



Skull and teeth. — The skull and teeth appear to be identical with 

 those of Preshytes natiin<s. 



Measurements. — External measurements of type: total length, 

 1 1 73; head and body, 468; tail vertebrae, 705; foot, 150 (145). 

 Measurements of adult male from type locality: total length, 12 13; 

 head and body, 550; tail vertebrae, 663 ; foot, 150 (147). 



Cranial measurements of type: greatest length, 88 (86) ;^ basal 

 length, 63 (61) ; basilar length, 57 (56) ; least palatal length, 24 

 (23) ; palatal breadth (between front molars), 18.8 (18) ; zygomatic 

 breadth, 66 (65) ; mastoid breadth, 58.4 (54) ; greatest breadth of 

 braincase above roots of zygomata, 52.4 (52) ; least breadth of 

 braincase immediately behind orbits, 46 (43) ; greatest orbital 

 breadth, 62 (57.6) ; least distance from orbit to alveolus of inner 

 incisor, 15.6 (15.6) ; greatest depth of braincase, 43 (43) ; mandible, 

 61 (62) ; maxillary toothrow (exclusive of incisors), 27 (26) ; man- 

 dibular toothrow (exclusive of incisors), 32.2 (31.8). 



Specimens examined. — Seven (one skull without skin), all from 

 Pulo Bintang. 



Remarks. — Although closely related to Preshytes natunce, this 

 monkey is readily distinguishable by the absence of the blackish cast 

 on back, legs, and tail. It is common on Pulo Bintang, and Dr. 

 Abbott notes that its cry is exactly like the shrill ka — ka — ka of P. 

 natunce and P. sumatranus. From this cry is derived the Malay 

 name, "kaka." In the living and freshly killed animals the palms 

 and soles are black, the face is slaty, and the eyelids and lips are 

 fleshy white. 



PRESBYTES BATUANUS sp. nov. 



Type. — Adult male (skin and skull), No. 121,810, United States 

 National Museum. Collected on Pulo Pinie, Batu Islands, Su- 

 matra, March 4, 1903, by Dr. W. L. Abbott. Original number, 2369. 



Characters. — Similar to Preshytes sumatranus, but not as large 

 and tail not as long. Skull somewhat broader than in the Sumatran 

 animal. 



Color. — Type : belly, under side of tail to about middle, inner sur- 

 face of thighs, and median line of chest gra3dsh white. Remainder 

 of fur black, the back and crown lightened by a brownish wash. 

 Beyond middle of tail the grayish white stripe on ventral surface 

 becomes much reduced in width, and its distinctness is further 



^ Measurements in parenthesis are those of an adult female Preshytes 

 natunce from Bunguran Island (No. 104,849). 



