OF THE SIVALIK HILLS. 



31 



greater width in its proportions : in which view we must be satisfied with 

 establishing it as a fossil variety of the C. Biporcatus of Cuvier and the 

 C. Porosus of Schneider. 



In taking the numerical proportion of the fossils already found as a 

 guide to that of the animals existing on this tract previous to the upheave- 

 ment of the line of country, it would appear that the Mastodon and 

 Elephant were the most numerous. 2, Ruminants, 3, Hippopotamus of 

 varieties, the largest of which with six incisors, He Sivalemis, is in the 

 greatest proportion. 4, Crocodile, Gharial, and Tortoise 5, Rhinoceros, Hog, 

 and Horse. 6, Carnivora. 7, Fish. 



The remains of Savirian animals, although standing high on this list, 

 consist chiefly of fragments of the osseous plates of the neck, vertebrse, 

 detached teeth, articulating extremities of bones of the arms and legs, as 

 well as other portions of the skeleton ; while portions of the head have been 

 rarely found. Those referred to in this note are very perfect : others are 

 crushed and distorted ; but the leading differences which have been advert- 

 ed to, are fairly marked in all those that have come under my observation. 



There appears to be a local disposition in the deposits of these remains 

 as would be natural to expect on a varied surface of plain, forest, and 

 marsh. The Mastodons, Elephants, &c., in great abundance at some points, 

 give place to the Hippopotami and Saurian reptiles in others. At many 

 places the latter, with the Tortoise, are totally wanting ; at others, as in a 

 stratum of an impure marie attached to this upper series where fresh water 

 shells (chiefly like the unio of the present day) M^ere found in great 

 abundance, nearly the whole of the remains accompanying them were those 

 of the Crocodile and Gharial. In considering the length of the fossil species 

 we see no signs of any thing beyond that of the animal now existing. 

 The largest remain in our possession is a vertebra which is one third larger 

 than that figured in the London Geological Society's Transactions amongst 

 the Ava fossils, and described as the remain of an enormous animal : the 

 vertebra abovementioned is either one of the dorsal or lumbar, but the 



