BOVID^E. 49 



M. 1940 a. Fragment of the right maxilla of an immature indivi- 

 dual, containing mm. 3, mm. 4, and the anterior lobe of m. 1 ; 

 from the Pliocene of the Siwalik Hills. 



Cautley Collection. Presented, 1842. 



Genus HIPPOTRAGUS, Sundevall l . 

 Syn. JSffocerus, Desmarest 2 . 



s, H. Smith 3 (amended, Gray). 



Hippotragus sivalensis, Lydekker 4 . 

 Syn. Antilope sivalensis, Lydekker 5 . 



This species apparently nearly equals in size the living H. niger. 

 It was provisionally referred to this genus by the present writer 

 in the Geol. Mag.' dec. 3, vol. ii. p. 170 (1885). 



Hob. India. 



39558. The cranium of an immature male, showing the bases of the 

 horn-cores, but wanting the muzzle and part of the occi- 

 put ; from the Pliocene of the Siwalik Hills, India. This 

 specimen agrees precisely in form with the type cranium 

 figured by the present writer in the ' Palseontologia Indica,' 

 ser. 10, vol. i. pi. xxv. figs. 1, 2, but evidently indicated a 

 considerably larger animal ; the type specimen probably, 

 therefore, belonged to a female. The penultimate and 

 last milk-molars are still in situ, while m. 3 is not pro- 

 truded. The general contour of the skull is the same as 

 in Hippotragus niger : it shows the absence of a distinct 

 lachrymal depression, the existence of a small elongate 

 lachrymal fissure, and similar supraorbital foramina 

 without pits at their exit ; the extremity of the maxilla 

 is similarly expanded in both ; the orbit large, with a 

 notch situated below the level of the supraorbital foramen ; 

 and the horn-cores are similarly situated above the orbits, 

 with a considerable interval between them, and directed 

 at their bases upwards and backwards ; there is also the 

 same strongly-marked ridge descending from the orbit to 



1 K. Svenska Vet.-Akad. Handl. for 1844, p. 196. 



2 ' Mammalogie,' p. 475 (1822). 



s In Griffith's ' Animal Kingdom,' vol. v. p. 324 (1827). 

 1 Palseontologia Indica (Mem. Geol. Surv. Ind.), ser. 10, vol. i. p. 164 (1878). 

 Antilope. s Loo. tit. 



PAH1 II. E 



