bovtd^;. 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^j. ; 

 from the Pliocene of the Siwalik Hills. 



Cautley Collection. Presented, 1842. 



Genus HIPPOTRAGUS, Sundevall \ 

 Syn. Egocerus, Desmarest 2 . 



JEgoceruSj H. Smith 3 (amended, Gray). 



Hippo tragus 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). 



Hah. 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 ' Palasontologia 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). 



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



4 Palasontologia Indica (Mem. Geol. Surv. Ind.), ser. 10, vol. i. p. 154 (1878). 

 Antilope. 5 Loc. cit. 



PAET II. E 



