130 Mr. R. I. Pocock on some 



By tlieir external cliaracters, dealt with in tliis paper, and 

 by their horns the genera of Antilopinse here admitted may 

 be briefly diagnosed as follows : — 



Genus Gazella, Lieht. 



Preorbital, inguinal, carpal, and pedal glands ])re.sent, the 

 pedal glands in the form of long and deep interdigital clefts 

 of even depth throughout ; rhinarium a small irregnlarly 

 pentagonal moist area on the narial septum, and not, or 

 only to a very small extent, bordering the nostrils above ; 

 urethral canal usually only surpassing the glans penis to 

 a small extent ; horns in males with concavo-convex, usually 

 sigmoid, curvature. 



Type, G. suh(/idturosa. 



Distribution. From Central and South-western Asia into 

 India and North and East Africa. 



Far too many species of this genus appear to me to be 

 admitted by Lydekker in the British Museum Catalogue. 



Genus Prodorcas, nov. 



Distinguishable from Gazella by the presence of a preputial 

 gland and a shorter tail, the structure of the pedal glands 

 being unknown. 



Type, P. yutturosa, Pall. 



Distribution. Mongolia and Northern China. 



Genus Antilope, Pallas. 



Distinguishable from Gazella by the nakedness of the 

 integumental web tying the hoofs together, by the larger 

 rhinarium which borders the nostrils above, by the much 

 longer and thicker elongation of the urethral canal of the 

 glans penis, and by the spirally twisted horns. 



Type, A. cervicapra. 



Distribution. India. 



Genus Antidorcas, Sund. 



Distinguishable from Gazella by the absence of inguinal 

 and carpal glands and by the presence of a large distensible 

 glandular area on the back, which is peculiar to the genus. 



Type, A. marsupialis , Zimm. 



Distribution. Africa south of the Zambesi. 



