HIPPOPOTAMID^:. 309 



18323. The seventh dorsal vertebra (imperfect). Figured, op. cit. 

 (Fig.) pi. Ixiv. fig. 8. 



18324. The eighth dorsal vertebra (imperfect). Figured, op. cit. 

 (Fig.) p]. Ixiv. fig. 10. 



18325. The last dorsal vertebra (imperfect). 



18326. A lumbar vertebra (imperfect). Figured, op. cit. pi. Ixiv. 

 (Fig.) fig. 11. 



18327. A lumbar vertebra (imperfect). Figured, op. cit. pi. Ixiv. 

 (Fig.) fig. 12. 



18328. The last lumbar vertebra. Figured, op. cit. pi. Ixiv. fig. 13. 

 (Fig.} 



18328 a. The sacrum. Figured, op. cit. pi. Ixiv. fig. 14. 



18329. The sacrum. Figured, op. cit. pi. Ixiv. fig. 15. 



18330. The sacrum. 

 17470. A left rib. 



Hippopotamus iravaticus, Falconer and Cautley 1 . 

 Syn. Hexaprotodon iravaticus, Falconer 2 . 



This species is slightly larger than the existing H. liberiensis, and 

 has three mandibular incisors ; the cranium being unknown. The 

 outer lower incisor is laterally compressed, and the mandibular 

 symphysis apparently relatively longer than in any of the foregoing 

 species. Other specimens are required to indicate its full afiinities. 



Hob. Burma. 



14771. Symphysis of the mandible of a subadult individual ; from 

 (Fig.) the Siwaliks of Burma. This specimen is the type, and is 

 figured by Falconer and Cautley in the ' Fauna Antiqua 

 Sivalensis,' pi. Ivii. fig. 10 ; and noticed by the present 

 writer in the ' Palasontologia Indica,' ser. 10, vol. iii. p. 42. 

 It shows the broken bases of the incisors and canines, and 

 one of the premolars partially protruded. 



Presented by Col. Burney, about 1841. 



1 Fauna Antiqua Sivalensis, pt. 7, pi. ITU. (1847). 



2 Journ. Ac. Nat, Sci. Philad. ser. 2, vol. i. p. 237 (1849). 



