2 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 56 



tiful on the Guas Ngishii Plateau, and herds numbering up to a 

 dozen or fifteen animals were frequently seen. One herd of about 

 seventy-five was noted, but this group later divided, about twenty- 

 five animals going in one direction and the remainder in another. 



BUBALIS COKEI (Gunther) 



Skull and skin of head and neck of a large male, given to Mr. 

 White by Dr. W. S. Rainsford. Probably killed on Dr. Rainsford's 

 last trip to the Thika River region, northeast of Nairobi, in Decem- 

 ber, 1908. 



The skull is a remarkable specimen in many ways, and differs 

 from any in the large series before me from neighboring regions 

 to the north and south. Compared with skulls of old males from 

 Taveta, Kapiti Plains, and the Guaso Nyiro River, it differs in its 

 greater length, greater breadth, relatively short distance from ante- 

 rior end of premaxilla to first premolar, wide interpterygoid space, 

 and small teeth. The horns are massive, wide spreading, and the 

 first ascending section is much longer than in any other specimen. 

 The terminal section is short, and the horn is therefore divided into 

 almost equal thirds, the outward ascending, horizontal, and terminal 

 parts being of equal length. The measurements of this skull (No. 

 155430) are: Condylobasal length, 410 millimeters; palatal length, 

 235 ; greatest breadth, 142 ; facial length, 405 ; muzzle to orbit. 302 ; 

 upper tooth row, 88; length of horns, 390; circumference at base, 

 254; greatest spread, 430; spread at points. 395; length of backward 

 terminal point, 120. 



These animals were noted by Mr. White on the Laikipia Plateau, 

 in the Elmenteita and Naivasha Lake country, and on the Athi and 

 Kapita plains. None were seen on the Guas Ngishu Plateau. 



BUBALIS JACKSONI Thomas 



Skull and head skin of adult male from the Guas Ngishu Plateau, 

 about June 15. This specimen, from only a short distance north of 

 the type locality of jacksoni, agrees with the descriptions of that 

 species, and the specimens in the Museum, in most particulars. The 

 points of the horns, however, incline inward, after the style of B. 

 nicdecki, from the White Nile region. Another specimen from the 

 same locality, a mounted head in Mr. White's collection, has the 

 horn tips nearly parallel, or but slightly turned outward ; and others 

 were killed, as shown in photographs taken by the party, in which 

 the horns distinctly turned outward. This illustrates the instability 



