External Characters of Ruminant Artiodactyla. 129 



respect the constancy of the characters established in 1910, 

 showing that, so far as the cutaneous glands are concerned, 

 the genus Aniidorcas differs from Gazella in the absence of 

 inguinal and carpal glands and the presence of the great 

 dorsal gland. 



I may add that the rhinarium resembles that of Gazella 

 in consisting of a small irregularly pentagonal area on the 

 narial septum, and that the penis is also like that of Gazella, 

 the urethral canal projecting a short way beyond the tip of 

 the slightly swollen glans (fig. 1, E). 



Genus Antilope, Pall. 

 Antilope cervicapra, Linn. (p. 894). 



My observations upon the cutaneous glands of this antelope 

 were based in 1910 upon two dried skins. Since that date 

 I have seen several fresh specimens, confirming in all respects 

 the characters previously established as distinguishing the 

 genus Antilope from Gazella. Two other differences are, 

 however, supplied by the rhinarium and the penis. The 

 rhinarium (fig. 1, K, L) is considerably better developed, 

 and therefore less specialised than in Gazella and Aniidorcas. 

 Not only is it broader between the nostrils, but it is extended 

 along their upper border nearly as far back as their posterior 

 notch. 



In the penis, figured by Lonnberg in 1904, the urethral 

 prolongation is longer and thicker than in Gazella and 

 Aniidorcas (fig. 1, A). 



Genus Lithocranius, Kohl. 

 Lithocranius ivalleri, Brooke (p. 896). 



I am indebted to the late Mr. F. C. Selous for the fore 

 and hind feet and the skin of the inguinal area of this 

 species from British East Africa. These show that the 

 foot I examined and described in 1910 was, as suggested, 

 distorted with respect to the glandular interdigital space. 

 This space (fig. 1, F) differs from that of Gazella, Anti- 

 dorcas, and Antilope in that it gradually deepens from its 

 upper (or proximal) to its lower (or distal) end, where 

 the thick interungual fold curves forward. In other words, 

 the skin of the front of the pastern above the depression 

 passes imperceptibly into the latter by a gradual inclination, 

 without showing a sign of the abrupt descent seen in the 

 other genera. The pedal gland recalls that of Rupicapra. 



There are two pairs of mammae, but no inguinal glands. 



