160 EINAR LONNBERG, MAMMALS COLLECTED BY THE SWEDISH ZOOLOGICAL EXPEDITION ETC. 
a | 0b ec var.! a 
| on | o young 
| ‘ mm mm. | mm. | mm. 
| Total ‘lengths. (22) Ah. SE eee, See . so. | 10835 }105;5 |) 98/5] 100 
Condylobasalylengthy 292 2helfe ca eeiabee ae REE) >< usmeeheLO2 a 08 92 | 95 
| Basicranial Si papacy «Fetus cyic SE: fae? foes Se aphande Ee) pot: | 92 85 88 
| Zy@omapic wigth 6 oss 5) es) ae sith oo Us ey cine aeons Sere ale SO ae bO) 47 
Posterior brim of orbit to gnathion. . ....-. ... 5. . « 76 AA AIM 3 72,5 
» » » » » anterior alveolaredge. ...... 53 51,8 | 50,5 51,5 
ength Of masala. 3) we ey ene) wine) er sv ie) eth ce ohne - - +) 21,5] 23 15,3| 19,5 
Tip of nasals to gnathion ....... Ngee ROE: 30 30 30,5) 30 | 
Length of upper molar series... . - +. ++ sss “HSte Ae 3b 34 33:5) — 
Breadth across posterior orbital walls... .........~ > 55 51,5 | 49 | 47,5 
Distance between outer sides of horn cores basally ..... 42 40, | 365) — 
Combined) breadth OL sepalsi ise 9) :) ake face sasuls ee ets 15 | 16 15 15 
The cranial measurements of this race are recorded in the accompanying table 
of measurements. As can be seen from the same, one of the skulls measured (ter- 
med »c ¢» in the table) is very much smaller than the two typical males (a, 6), in 
spite of the fact that it is fully adult. The skull ¢ looks also very different when 
compared with the others especially because the distance between the horns is smaller 
and the nasals shorter. I am, however, inclined to regard it as an individual aber- 
ration, a dwarf, because the skin is quite like the other male skins except that the 
tuft is smaller and the black tips to the hairs of its posterior portion a little more 
conspicuous than in the typical males. But it is not excluded that it represents a 
smaller but related race as it was found at another locality, although not much 
distant. 
This small buck was shot at Njoro a watering place belonging to the Rendiles 
about 2 days march north of Guaso Nyiri (*’/: 1911). In the same neighbourhood a 
female Dikdik was also shot, but this was unfortunately so young that its dimensions 
are of little value. 
These Dikdiks were common in the thornbush country north of Guaso Nyiri below 
Chanler Falls. In habits they resembled the other species. A few times I heard 
them produce a kind of whistling sound like »i i», and a snort when they were started. 
Kobus ellipsiprymnus canescens n. subsp. 
The specimen on which O«aitey based the specific name ellipsiprymnus was 
brought from South Africa, although the exact locality hardly is known with cer- 
tainty.” All Waterbucks with a white line across the rump have afterwards been 
' The milk-molars still remain, and m® is cutting the gum. 
* Conf. W. L. Sctarer: Mammals of South Africa. Vol. I, p. 187—188. 
