349—172 INDIAN TERTIARY AND POST-TERTIARY VERTEBRATA. 
(oligocene) of Hampshire 1 and the Paris basin, 2 and surviving till the lower miocene. 
A considerable number of species have been recorded ; but as there are only two of 
these approaching in size to the Indian form, it will be unnecessary to give a list. 
Species : IIy^enodon indicus, n. sp., nobis. 
History. — The present species is mentioned here for the first time. 
Last lower premolar. — The tooth represented in the accompanying woodcut (fig. 
21) was obtained by Messrs. Garnett and 
Trotter from the Siwaliks of Kushalghar, 
below Attock. 3 As the specimen is implanted 
in a fragment of the mandible, there is no 
doubt as to the series to which it belongs. 
The crown is sub-conical; highly convex on 
the outer, and flattened on the inner side : 
Fig. 21. Eytsnodon indicus, nobis, 4th right posteriorly it has a large talon, of a tri- 
lower premolar; from the Siwaliks of in • i -n 
Kushalghar; Indian Museum (No. d. 57); « angular form, while there is a much smaller 
from the outer, b from the inner aspect. |. anterior talon : the fore-and-aft edges are sub- 
trenchant ; and there is a small secondary cusp on the latter, near the summit of 
the crown. This tooth agrees so essentially with pm. 4 of Hycenodon, that there is 
every probability of its belonging to that genus : and in any case it must have 
belonged to a closely allied form. 
The only described species having teeth as large as the present specimen is the 
American II. horridus , Leidy 4 ; but the anterior talon is absent in pm. 4 of that form. 
In the somewhat smaller II. lieberti , Filh., 5 from Quercy, pm. 4 is exceedingly like the 
present specimen ; but the two talons are perhaps more nearly equal in size. In the 
still smaller H. requiem, Gerv., the same tooth is also very similar to the present 
specimen, but the relative convexity of the outer, and the flatness of the inner 
surface, is less marked in the former. In II. leptorhynchus , 6 L. and P., there is no 
distinct anterior talon to pm. 4. Since all the other species are of smaller size, there 
can be no doubt of the specific distinctness of the Indian form ; which may receive 
the specific name indicus. 
Third lower true molar . — The tooth represented in pi. XLIII., fig. 5, obtained by 
Mr. Theobald from the Siwaliks of the Punjab, is apparently the 3rd left lower true 
molar of an animal of the present group. It is divided into two distinct lobes, of 
which the first is the stoutest : externally there is a stout cingulum forming the base 
1 Lower Headon : vide ‘ Quart. Journ. Geol. Soc.,’ vol. XXXIX., p. 571 : this statement is founded on a mandible in 
the British Museum (No. 29,752). 
2 6th stage of Prof. Gaudry. 
3 Vide “ Pal. Mem.,” vol. I., p. 414 : this specimen is not mentioned by Dr. Falconer, although it was in the collection 
submitted to him by Dr. Oldham. 
4 “ Extinct Mammalian Fauna of Dakota and Nebraska,” pi. III. 
5 ‘‘Phosphorites du Quercy,” figs. 158-60. 
6 Ibid., fig. 143 : Blainville, “ Osteographie,” Genus Suhursus, pi. XVIT. 
