Zoological Society. 413 



G. dorcas. "I Q^ ^j^ggg G. mhgvtturosa. 



G. Bennettii. I • t i, G^- Soemmerinqii. 



^ , > cies I have r< j. 



G. gutturosa. J G-. coins. 



G. hemas. 



Several of the so-called species that are closely allied in size and 

 colour to G. dorcas, appear to me to be merely varieties, as some of 

 them have been considered by the older naturalists. 



This genus seems prone to exhibit in certain species inhabiting 

 more temperate regions, enlargements of, or appendages to, the re- 

 spiratory passages ; for example, the enlarged larynx of G. gutturosa, 

 the elevated nose of G. coins, and the appendages to its sides in the 

 Chiru {G. kemas) ; these seem to be physiological adaptations, in no 

 case marking a group, and therefore insufficient to warrant generic 

 distinction, which has been made in the two latter instances. How- 

 ever, not having as yet seen entire skulls of these species, I retain 

 them pro%'isionally in this genus, judging by the horns. I think few 

 naturalists will set forth, with Mr. Gray, the colour of the horns of 

 the Saiga as a generic character. Even in the G. Bennettii, so closely 

 aUied to G. dorcas, Mr. Hodgson states that the suborbital sinus is 

 wanting, and he places the animal in a distinct genus, Tragops (after- 

 wards altered to Tragomma), on account of this difference ; while 

 Colonel Sykes, the original describer of the species, affirms that it 

 exists, though of very small size. Mr. Hodgson also denies it to the 

 Chiru, which forms his genus Panthelops, and to which he assigns 

 only five molars in each series, 



Cervicapra. 



A small suborbital fissure, and a very large fossa ; the tubercles 

 and median groove of the basioccipital bone well-developed. The 

 other cranial characters as in Gazella. 



Horns annulated, spirally tivisted. 



Hab. India, 



C. hezoartica. 



The remainder of this group, if we exclude the Cephalophi andi the 

 four- horned Antelopes of India, consists of a number of small spe- 

 cies, apparently nearly alUed, forming the subgenera Tragubts and 

 Neotragus of Major Hamilton Smith. These are very distinguish- 

 able by the former having vertical, the latter recumbent horns ; to 

 the former, however, must be added the Chirebi {A. scoparia), from 

 his subgenus Redimca {Eleotragns). Mr. Gray divides them into 

 several genera, depending upon the presence or absence of inguinal 

 pores and knee-tufts, the shape of the hoofs, the presence or absence 

 and form of the "tear-bag," the condition of the fur ; and one genus, 

 founded upon two very young specimens, is characterized by the ab- 

 sence of the lateral rudimental hoofs. Most of these characters I 

 must decidedly reject ; and as I do not consider the evidence of dried 

 skins quite satisfactory with regard to certain others, and have as yet 

 seen skulls of only two species, I will content myself at present with 

 adopting only the two genera of Major Smith ;' using however, for 



