8 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 6l 



side, the inside uniform whitish like the underparts ; a heavy black 

 band about the hoofs which reaches halfway to the false hoofs. 

 Hindlegs like the fore but the inside from hocks to hoof uniform in 

 color with the outside. Crown of head russet lined heavily by black ; 

 snout on the sides buff y like the legs, the median portion blackish ; 

 lips and chin whitish ; midline of throat buff-yellow without darker 

 vermiculations. Back of ears clothed by short buffy hairs, central 

 portion and margin blackish, except on lower inner border, which is 

 marked by a white bar or spot ; inside and base whitish. 



Measurements in the flesh. — Head and body, 830 ; tail, 75 ; hind- 

 foot, 225 ; ear, 93. Skull, condylo-basal length, 130 ; greatest breadth, 

 76 ; nasals, 41 x 22 ; gnathion to orbit, 66 ; vertical diameter of orbit, 

 29 ; length of premaxillse, 35 ; upper tooth row, 52 ; gnathion to PM\ 

 29; width of palate across M 3 , 48; post orbital constriction, 48. 

 Skull old, the premolars much worn and the sphenoidal sutures oblit- 

 erated by anchylosis. Premaxillse at tips slender, not broadly club- 

 shaped as schillingsi. 



Six specimens of this race from the Rainey Expedition are in the 

 National Museum. Five of these are females, all of which are with- 

 out horns or any evidence of horn cores on the skulls. One is a 

 male with well developed horns. From Lololokwi, the type locality, 

 there are two females ; one specimen from the middle course of the 

 Guaso Nyiro and three others from the rock kopjes of the northern 

 edge of the West Kenia Plateau. These specimens agree closely in 

 color with the type. The range of this species meets that of schil- 

 lingsi, 2l race in which the females have as well developed horns as 

 the males, in the region about Lake Baringo. To the eastward the 

 southern limit of the range is no doubt marked by the Tana River. 

 Along the frontiers of the two races there is no indication in speci- 

 mens of a transition from the hornless to the horned females. All of 

 the female specimens of schillingsi examined are well horned, the 

 longest horned specimen of the race being that of a female. The 

 coloration of this race, however, shows no striking color differences 

 with the others in which the females are hornless. The horned char- 

 acter of the females, which is the chief character of the race, was 

 not known to the describer, Herr Oscar Neumann. His specimens 

 had not been sexed in the field by the collectors and the skins were cut 

 in such a way that no evidence of sex remained. His specimens, 

 however, were all horned and on this account they were classed as 

 males. 



