8UIDJE. 259 



Genus HIPPOHYUS, Falconer and Cautley l . 



This genus appears to be allied to Hyotlierium, but has an ex- 

 tremely complex structure in its molar dentition (vide ' Palaeonto- 

 logia Indica,' ser. 10, vol. iii. p. 90). 



Dentition : I. |, C. [, Pm. |, M. J. 



Hippohyus sivalensis, Falconer and Cautley 2 . 

 Hob. India. 



M. 2053. Cranium of an adolescent individual ; from the Pliocene 

 (Fig.) of the Siwalik Hills, India. This specimen is the type of 

 the genus and species, and is figured by Falconer and 

 Cautley in the ' Fauna Antiqua Sivalensis,' pi. Ixx. fig. 1, 

 the dentition of the right side (reversed) being represented 

 of the full size in pi. Ixxi. fig. 1 of the same work ; it is 

 described by the present writer in the ' Palseontologia 

 Indica,' ser. 10, vol. iii. pp. 86, 87. 



Cautley Collection. Presented, 1842. 



M. 2054. Fragment of the right ramus of the mandible, showing 

 (Fig.) m. 2 and m. 3, in an imperfect condition; from the Pliocene 



of the Siwalik Hills. Figured by Falconer and Cautley, 



op. cit. pi. Ixxi. fig. 2. 



Cautley Collection. Presented, 1842. 



Bt. 2055. Fragment of the right ramus of the mandible, showing 

 (Fig.) part of p m . 4, mTT, and m. 2 ; from the Pliocene of the 



Siwalik Hills. Figured by Falconer and Cautley, 



op. cit. pi. Ixxi. fig. 3. 



Cautley Collection. Presented, 1842. 



16582. Fragment of the right ramus of the mandible, containing 

 (Fig.) pm. 4, m71j and m. 2, mostly perfect ; from the Pliocene 



of the Siwalik Hills. Figured by Falconer and Cautley, 



op. cit. pi. Ixxi. fig. 4. 



Cautley Collection. Presented, 1842. 



Genus SUS, Linn. 3 

 Including Porcula, Hodgson, and Potamochcerus 4 , Gray. 



Dentition : 1. 1, C. \, Pm. ^, M. |. In some fossil species the 

 first premolar is absent. 



1 In Owen's ' Odontography,' p. 662 (1840-45). 2 Ibid. 



3 Syst. Nat. ed. 12, Tol. i. p. 102 (1766X 



4 The reasons for including these two genera are given in the ' Paleeontologia 

 Indica,' ser. 10, vol. iii. p. 49. 



82 



