the smaller S.-American CerviJae. 587 



skull, and the lesser exteiisiou of the premaxillae towards the 

 nasals. 



Mazama sheila^ sp. n. 



A small pale rufous ally of M. americana. 



Size conspicuously smaller than in M. zetta. Form about 

 as in that species. Fur close and sliort. Nape-hairs not 

 reversed (in the single specimen). General colour bright 

 rufous (between orange-rufous and tawny of Ridgway). 

 Muzzle, centre of crown, and neck brown, supraorbital lines 

 rufous, not sharply defined. Ears pale brown, with distinct 

 patches of white at the base of their inner edges. Chin and 

 interramia, a patch on chest, and anal region whitish ; rest 

 of under surface rufous, like back. Fore limbs rufous 

 throughout. Hind limbs rufous, but the metatarsals brown, 

 darker posteriorly. Tail rufous above, white below. 



Skull of the same somewliat broad squat shape as in 

 M. zetta, but far smaller. Premaxillse not quite reaching to 

 the nasals. 



Dimensions of the typical skull (adult, but not old) : — 



Conclylo-basal length 177 mm.; zygomatic breadth 85; 

 length of nasals 48 ; interorbital breadth 39 ; gnathion to 

 front of anterior premolar 58 ; palatal length 111 ; breadth 

 between outer sides of m^ 63 ; upper tooth-row 55. 



Hob. Lowlands near Merida, Venezuela. Type from the 

 Montana de Limones. Alt. 50 m. 



Type. Adult male. B.M. no. 13. 4. 24. 4. Collected 17th 

 October, 1910, by S. Briceno and Sons. 



This Brocket is readii}^ distinguishable by its bright rufous 

 colour, unreversed nape-hairs, and small size, as compared 

 with its only near allies, M, americana and zetta. 



Coming from somewhere near the same region, Osgood's 

 M. americana cttus* has nothing to do with this animal, but 

 is a member of the M. simplicicornis group. 



Mazama americana jucunda, subsp. n. 



Similar in general characters to the ordinary M. americana 

 of eastern South America (J/, rufa auctorum), but the skull 

 conspicuously shorter. Fur of medium length ; nape-hairs 

 reversed (one skin only). Colour above of head and neck 

 brown, of body bright rufous fawn, not very unlike that of 

 M. zetta. Under surface, as usual in this group, whitish on 

 chin and throat, rufous, like back, on belly. Limbs brown 



• Cf. footnote above. 



