﻿JSrOTES ON SAME MAMMALS COLLECTED IN CONGO. 



13 



Muzzle to orbit 



» » anterior premolar 



Length of tooth-series . . . 



» ') horns 



Basal diameter of horns . . 



These measurements agree so nearly that it is only tlie 

 dimensions of tlie nasals which are a little different. They 

 are longer and narrower in the type of C. nyasm so that 

 the breadth of the nasals is contained fully 2V2 times in 

 their length, while the breadth of the nasals of the Blue 

 Duiker from Congo is contained only twice in their length. 

 As the latter is a fully adiilt animal with well worn teeth 

 it may be assumed that the horns of the Congo race are a 

 little smaller than those of the typical C. nyasce. A direct 

 comparison might reveal some more, although probably only 

 slight, differences. The colouration of these specimens dif- 

 fers a good deal from that of the type of C. nyasce. The 

 colour of the back of the latter is according to Thomas 

 »darker brown» than in C. monticola with more rufons suffu- 

 sed in it, the median area nearly matching Ridgway's »burnt 

 umber», riimp of the same Duiker is said to be »dark choco- 

 late-brown». The back of the present specimens may be 

 termed »warm sepia» ^ nearly equally dark from the neck to 

 the rump. Towards the sides and flanks the dark colour of 

 the back gradually shades into a light »smoke grey» with a 

 slight buffish tint produced by the tips of the hairs. Mes- 

 sially below this light grey colour it becomes entirely white. 

 On the hams the tips of the hairs 'are rufons to such an 

 extent that a påle rufous colour prevails there, but the hairs 

 have with exception of the extreme tips the same light smoke 

 grey colour as on the flanks. The rufous colour on the hams 

 is rather sharply defined from the dark sepia brown of the 

 rump but shades gradually into that of the flanks. The legs are 

 rufous with a smoky brown mark above the hoofs laterally. 



^ According to the terms of »Repertoire de Couleurs» 



