CEPHALOPHJN.K 109 



the next by the markedly obtuse angle formed by the relatively 

 long and slender horns with the plane of the face, the longer 

 and pointed ears, and the lighter and more slender build. Size 

 medium to small, the shoulder-height ranging from 23 to 

 25 inches. General colour varying from pale greyish brown 

 with a distinct blackish grizzle, owing to dark and light 

 annulations on the hairs, through a yellowish phase, to 

 uniformly bright ochery yellow. Horns generally absent in 

 female. Inguinal glands present. 



The species is taken to include all but one of the duikers 

 in which the horns form a marked angle with the plane of the 

 face. Pocock,* while remarking that abyssinicus is very closely 

 allied to the typical grimmi, considers that it is probably 

 only a subspecies of coronatus, to which he refers campbellice 

 as a second subspecies : \ if these views be correct, there can 

 be little hesitation in regarding all the local forms of these 

 obliquely horned duikers as referable to a single species. 

 In this extended sense the range of the species will include 

 the greater part of the more open parts of Africa south of 

 the northern tropic, these duikers being less addicted to 

 thick covert than are the members of the other two sub- 

 genera. 



The following is a provisional attempt to form a "key" 

 to the local races of the species ; a matter of great difficulty, 

 owing to the slight differences on which many of them have 

 been founded : 



A. Ears long, as much as 4 inches ; size large ; 



shoulder- height 23 to 25 inches. 



a. Forehead rufous. 



a'. General colour grey fawn above and below C. g. grimmi. 

 b'. General colour yellower (yellowish brown). 



a". Short black tips to hairs ; under-parts 



dark C. g. flavescens. 



b". Black tips larger; under-parts white ... C. g. altifrons. 



b. Forehead with dark blaze, forming upward 



extension of nose-stripe C. g. splendidulus. 



B. Ears shorter, 3 inches or less in length. 



a. Pasterns yellow at sides ; size small, 17 or 

 18 inches at shoulder. 



a'. Coat nearly uniform yellow C. g. coronatus. 



b'. Coat heavily speckled with black C. g. campbellice . 



* Op. cit. p. 876. f Ibid. p. 873. 



