200 CLASS MAMMALIA. 



reous Antelope, or Eleotragus of Schreber, as having the 

 points turned forward. We had placed it in the group of 

 Oryx, with the surmise that this referred to Kemas in our 

 original catalogue. There is, however, a slight difference, 

 the present having a small lateral bend, which we hear 

 does not exist in the Chiru. If, therefore, it does not be- 

 long to the Bhote species, it is a fragment of one not as yet 

 described. 



The Gazelline Group. 



Of the great genus Antilope, there appear to be two 

 parallel lines of affinities, descending, with trifling inter- 

 changes of subordinate characters, down to the lower 

 groups included in it. The first with horns in both sexes, 

 passing from the Aigocerine racemus, through the Gazellae, 

 and the second from the Oryges, through Antilopedes, to 

 Reduncae, Cervicaprae, Cephalophi, Neotragi, Tetraceri and 

 Raphiceri, till we arrive at those which depart from the 

 slender structure of the former, and gradually assume more 

 the characters of Capra and Ovis. In connecting, therefore, 

 the series by the gradations of character, either might be 

 selected, as through the Addax a natural passage is formed 

 to the Spirally-horned Antelope and through Oryx or 

 Kemas, a similar osculation takes place with Pallah ; but 

 as in the groups of Antilope, and their connecting links, 

 the females are hornless, it may be deemed preferable to 

 follow in the first instance the Aigocerine series, by means 

 of A. Pygargas, through the Gazelles, and then taking the 

 Antelopes connected, both with the Oryges and Gazellae, 

 immediately after them, continue that line till the An- 

 tilopine type becomes confounded in the Caprine. The 

 Gazellse have the females provided with horns, and the 

 structure of these arms, particularly in the larger species, 

 offer curves more decisive indeed, but still of a similar 

 primitive direction as in the Aigoceri. The annuli are 



