158 EINAR LONNBERG, MAMMALS COLLECTED BY THE SWEDISH ZOOLOGICAL EXPEDITION ETC. 



Total length 



Condylobasal length 



Basicranial » 



Zygomatic width 



Posterior brim of orbith to gnathion 



» » » » » anterior alveolar edge 



Length of nasals 



Tip of nasals to gnathion 



Length of upper molar series 



Length of horn 



This grey Dik-dik was rather common in the thornbush in the localities men- 

 tioned especially on rocky hill-sides. It occurred as other species in pairs. When I 

 had shot the first pair of this kind ^^,'2 1911 one days march to the east of the 

 Marsabit road I wrote in my diary: »The two Dikdiks shot to day have a soft and 

 long, rather tapire-like nose (Conf. PI. XIV fig. 1), just as the nasoguttatus mounted 

 in the museum in Stockholm. They look rather long-legged Avhen they do not run 

 fast. When first started the make some stiff jumps (like several other antelopes) 

 before they begin to run. Sometimes they stop soon and look round. » 



Rhynochotragus cavendishi minor Lonnberg. 



LOnnbeeg: Ann. & Mag. Nat. Hist. Ser. 8, Vol. IX, p. 65. 



When the Expedition had passed eastwards to below Chanler Falls another 

 Dik-dik was met with. This one was more yellowish in colour, and its nasals were 

 not so short as in the grey species seen a few days before. It belonged evidently 

 to the Rhynchotragus Icirhi group. To this group can be counted Kh. hirki Gunther, 

 Rh. k. hindei Thomas, Rh. cavendishi Thomas, Rh. thomasi Neumann, and Rh. dama- 

 rensis Gunther. For geographical reasons as well as for differences wih regard to 

 the skull the last mentioned species does not need to be compared with the present 

 specimens. When describing Rh. thomasi Neumann has, as usual, not cared to give 

 any skull measurements but only described the colour of the animal.^ As this is 

 said to be »rotgelb» it cannot be regarded to resemble my specimens at all. Rh. 

 cavendishi Thomas is a large species with the basicranial length in the male type- 

 specimen 104 mm. thus very much more than in the present specimens (conf. table 

 of measurements), and other dimensions differ in similar proportions. In some respects, 

 however, my specimens resemble Rh. cavendishi viz. in the development of the pre- 

 maxillaries which are said to reach the nasals, »articulating broadly* with them, and 



1 Sitz.-ber. d. Naturf. Freunde, Berlin 1905, p. 89. 



