100 UNGULATA. 



molars. The mandible provisionally assigned to the species was 

 probably without cutting-teeth, although the occurrence of such 

 teeth might be expected in this Pliocene form. The species is not 

 improbably an ancestral form both of R. antiquitatis (with which it 

 was apparently connected by an unnamed species from Maragha in 

 North-western Persia 1 ), and of the African E. simus. An upper 

 molar from Algeria figured by Thomas 2 probably indicates another 

 member of the same group. 



Hob. India. All the specimens are from the Pliocene of the 

 Siwalik Hills. 



36661. The nearly complete cranium, showing the six cheek-teeth, 



(Fig.) in a comparatively early stage of wear. This specimen is 



described and figured (from a cast) by the present writer 



in the ' Palaeontologia Indica,' ser. 10, vol. ii. p. 49, pis. viii., 



and ix. fig. 2 ; it was collected by Sir W. E. Baker. 



Presented by the Secretary of State for India, 1860. 



33662. The anterior portion of the cranium, in a much-rolled con- 

 (Fig.) dition, and with the crowns of the teeth hammered off. 

 Figured by Falconer and Cautley in the ' Fauna Antiqua 

 Sivalensis,' pi. Ixxii. fig. 1. This and the following speci- 

 mens are the types. Cautley Collection. Presented, 1842. 



M. 2731. Hinder part of the cranium, with a fragment of the right 

 (Fig.) ramus of the mandible attached. Figured by Falconer 

 and Cautley, op. cit. pi. Ixxii. fig. 2. 



Cautley Collection. Presented, 1842. 



39641. The second right upper true molar, in a broken condition. 



(Fig.) Figured by Falconer and Cautley, op. cit. pis. Ixxii. fig. 6, 



and Ixxv. fig. 11. Cautley Collection. Presented, 1842. 



39640. The third right upper true molar. Figured by Falconer and 

 (Fig.) Cautley, op. cit. pi. Ixxii. fig. 7, and Ixxv. fig. 12. 



Cautley Collection. Presented, 1842. 



17996. Anterior portion of a mandible, provisionally referred to this 

 (Fig.) species, showing the last three premolars and the first two 

 true molars. Figured by Falconer and Cautley, op. cit. 

 pi. Ixxiv. fig. 6, under the name of R. sivalensis. The 

 reasons for provisionally assigning this specimen to the 

 present species are given by the present writer in the 



1 See a paper by the writer on the Fossil Mammalia of Maragha in the Quart. 

 Journ. Geol. Soc. vol. xlii. (1886). 

 a Mem. Soc. Geol. France, ser. 3, vol. iii. art. 2, pi. x. (ir.) fig. 3 (1884). 



