KUNGL. SV. VET. AKADEMIENS HANDLINGAB. BAND 48. W.O 5. 159 



with regard to the comparatively long nasals. In Rh. hirhi GtUNTher again the nasals 

 are very much shorter than those of the present specimens, hardly measuring ^s as 

 much in length, and it has slender premaxillaries, »their ascending process sometimes 

 ending just above the anterior tooth, and sometimes rising nearly or quite to meet 

 the nasals. »^ The shape and size of the premaxillaries is also shown by Gxjnther's 

 figure of the skull of Rh. hirki. This is quite a considerable difference, in spite of 

 the variability, from the condition found in the present specimens in which the pre- 

 maxillaries are gradually widened so that their suture with the nasals amounts to 

 6—8 mm. It is also unlike the condition in Rh. h. Mndei Thomas about which the 

 describing author says: spremaxillse just touching nasals above».^ It is evident that the 

 broad connection between the premaxillary and the nasal gives a greater firmness to 

 the anterior portion of the skull which serves to support the proboscis than in such 

 forms in which no such connection is to be found. The solidness of this portion of 

 the skull is still more increased in my specimens from Guaso Nyiri by the premaxil- 

 laries being somewhat thickened when compared with the thin transparent lamina 

 of the maxillary and the lacrymale which form the lateral wall of the nasal cavity. 



Considering the structure of the anterior portion of the skull it appears suitable 

 to regard these my Dikdiks as forming a subspecies of Rh. cavendishi which in con- 

 sequence of its small size may be named minor. 



The general colour above is a grizzled yellowish grey produced by huffish yellow 

 subterminal rings and dark brown tips to the hair, which basally are greyish brown. 

 The middle of the back is more brownish. The neck looks paler greyish, and less yellowish 

 because the subterminal rings are there dirty whitish. The flanks are less grizzled and 

 paler than the back, about sand-coloured, sometimes more, sometimes less suffused with 

 huffish. Surroundings of the tail and posterior parts of hams pure ashy grey. Lower 

 parts suffused with buff, only the middle of the belly and inside of hams being pure 

 white. Lower neck pale yellowish grey, throat white in the middle, suffused with buff 

 on the sides. Legs and middle of the face fulvous buff, sides of face paler almost sandy. 

 A white spot around the eye. Anterior shorter portion of crest ringed with huffish 

 white and dark brown, but the greater posterior portion dull fulvous buff with hardly 

 conspicuous dark tips to some of the hairs. Ears sand-coloured on the outside, white 

 within, with a black line along the upper half of the outer margin as well on the 

 outer as on the inner side. 



' The females have a smaller crest the hairs of which are very broadly tipped, 



with black. 



1 Book of Antelopes, Vol. 2, p. 83 and p. 85 fig. 29. 



2 Ann. & Mag. Nat. Hist. Ser. 7, Vol. X, p. 243. 



