80 
[voL. xr. 
Itecords of the Geological Survey of India, 
The entire distinctness of these upper and lower molars from those of any 
known genus confirm the conclusions previously arrived at as to the distinctness 
of the genus to which they belong. I propose to call the new genus Hemimeryx. 
Besides the above-mentioned specimens, Messrs. Blanford and Pedden have 
also collected from the same formation several detached upper molar teeth, which 
belong to two other species of Merycopotamoids, apparently generically distinct 
from any of the above, or from Oltmromeryx. Both these types of teeth are of 
smaU size, the one is considerably larger than the other; they belonged to animals 
intermediate between the bunodont and selenodont suina ; both types carry four 
cones only on the masticating surface; one lower molar, probably belonging to 
the same species as the larger upper molars, has also been obtained. Mr. Fedden 
has also obtained from Sind the hinder half of a cranium of a Merycopotamoid, 
which, I think, may probably have belonged to the same species as the larger of 
the molars in question. Should further researches prove, as I think will be 
the case, the generic distinctness of these teeth, I shall propose the name of 
Sivameryx for the new genus. All the above specimens will be subsequently 
figured. 
Of the Sind llyopotamus ' the Indian Museum has received two imperfect 
specimens of the last lower molar: these teeth agree very closely in character 
with the Eui'opean H. hovmus; we have also received a portion of a lower jaw 
containing sections of the bases of the two last lower molars, which agree in 
form and size with the last-mentioned lower molars. The fragment agrees very 
closely vuth the corresponding portion of the lower jaw of H. hovinm figured 
in the above-mentioned paper of Professor Owen’s. The depth of the Sind jaw 
is 1’3 inch, and the length of the section of the last molar 1'32 inch; these 
dimensions seem to be identical with those of If. hovmus; the upper molars of 
the Sind species are, however, less concave on the external (dorsal) surfaces of 
the outer columns than those of the European species. 
From the perusal of this and other papers by myself on the same subject, it 
will be gathered that the Sind Siwaliks afford us evidence of the former exist¬ 
ence in that area of a very largo assemblage of both bunodont and selenodont 
pig-like animals; a group wiiich is very sparingly represented in the typical 
Siwahks, and of which Meryeopotcmnus seem to have been the last representative, 
the group having now entirely disappeared from the living faunas of the globe. 
We cannot help having a feeling of regret that these interesting animals are 
at present only known to us from the evidence of isolated teeth or of a few 
fragmentary crania and bones. The separation of the upper and lower teeth 
which generally happens in Siwalik fossils often renders it a matter of extreme 
difficulty to refer the upper and lower molars to their respective owners, as 
is exemplified in the case of the above-mentioned teeth of Hyotlierium and 
Anfhracothernim. 
I am not sure whether Morycopotamus occurs in Sind or not, as the bones 
which I at first thought belonged to that genus -which have been obtained by 
Messrs. Blanford and Fedden may very probably belong to some of the aUied 
Kec. Geol. Surv. India, Vol. X, p. 77. 
