1900.] MR. A. L. BUTLER ON A NEW SEROW. 675 



Grenus Bassaricyon. 



External form like that of Cercoleptes, but with non-prehensile 

 tail. Nose grooved anteriorly. Mammse 2. Sole of feet naked. 

 Premolars 4 ; molars 2 ; both tri-tuberculate in upper jaw ; in 

 lower jaw 2 molars with 4 tubercles. Vertebral formula : C. 7, 

 D. 13, L. 7, S. 3, Ca. 15+? Nine ribs join the sternum. Clavicle 

 entirely absent. In skull, palate much produced behind last molars, 

 coronoid process of mandible long and backwardly hooked, angular 

 process slight. 



2. On a new Serow from the Malay Peninsula. By A. L. 

 Butler, F.Z.S., Curator, Selangor State Museum. 



[Received June 19, 1900.] 



It has hitherto been supposed that the Serow which occurs in 

 the Malay Peninsula is identical with Nemorhcedus sumatrensis 

 (Shaw). No skin from this region, however, has ever been sent 

 to Europe, and on examining two specimens recently obtained 

 on the Larut Hills, Perak, I am convinced that they belong to a 

 species as yet undescribed. 



From the following description it will be seen that the Malayan 

 Serow differs conspicuously from NemorJiasdus sumatrensis in its 

 jet-black legs, the limbs in that species being always tan or rufous. 

 This uniformity of colouring on body and limbs alone gives the 

 animal an entirely different appearance from the Burmese Serow. 



Nor does it agree in any way, as might perhaps have been ex- 

 pected, with Blyth's N. ruhidus from Arakan. Blvth described 

 the Arakan species (Cat. Mamm. Mus. As. Soc. 1863, p. 174), 

 from a stuffed head, an adult skin aud one of a kid, as being " of 

 a red-brown colour with black dorsal list ; the hair shorter tbau 

 of the others." The Malayan animal is mostly black, the under- 

 colour on the back is greyish white ; the hair is not shorter than 

 in N. sumatrensis. 



Description of a female specimen in the Perak Museum, shot 

 by Sir Frank Swettenham on the Larut Hills, Perak, early in 

 1899 :— 



Nemorhjbdus swettenhami, sp. n. 



General colour black, the back strongly and the sides slightly 

 grizzled with grey, the bases of the hairs being whitish. Along 

 the lips whitish grey ; the posterior portion of the upper lips, a 

 patch on each side of the lower jaw and one on the throat rusty 

 red. Ears black, grizzled with rusty at the base, and lined and 

 edged with greyish-white hairs. Mane black, mixed with whitish 

 hairs on the fore part of the neck and with reddish hairs towards 

 the withers, lusides of the thighs rusty red. Remainder of head, 

 neck, chest, belly, and legs black. Tail black. 



