Geological Society. 577 
rious kinds of clayslate and quartz, and the marl is exposed only at 
Nahun, where it contains the same organic remains as in the Kalowala 
Pass. From Nahun to the plains there is a succession of sandstones 
and clays, dipping on an average about 20° tothe north. In the 
neighbourhood of that town the sandstone is hard and used for build- 
ing; but it becomes soft on approaching the plains. The clays are 
stated to be more or less rich in Testacea, and the sandstone in re- 
mains of Mammalia. 
The large collections of bones obtained by Capt. Cautley were found 
partly lying on the slopes among the ruins of fallen cliffs, and partly 
in situ in the sandstone; and he is of opinion that the former have 
been, in a great measure, preserved by the sandstones in immediate 
contact with the bones, being much harder and more ferruginous than 
in the general mass. 
The following is a list of the remains which had been determined 
at the time the memoir was written. 
Mastodon, elephant, rhinoceros, hippopotamus, hog, horse, Ox, 
elk, deer, several varieties ; carnivora, canine and feline ; crocodile, 
gavial, emys, trionyx, and fishes ; and portions of undescribed mam- 
malia. 
The remains of all these animals are in great abundance, with the 
exception of the Horse and Carnivora ; but the bones of the head are 
better preserved than those of the trunk or the extremities. Some- 
times the fractured bones have admitted of being joined, though the 
surfaces were coated with calcareous spar. 
In assigning an age to the formation composing the Sewalik moun- 
tains, Capt. Cautley adopts the views of his friend Dr. Falconer, who: 
in a notice read before the Asiatic Society of Calcutta, considered the 
deposit to be synchronous with that from which Mr. Crawfurd 
obtained the remains near Prome, on the banks of the Irawadi, 
there being an agreement in the organic remains. The author then 
offers some remarks on the Mastodon elephantoides and M. latidens, 
and in consequence of his having found jaws in which the front teeth 
are not to be distinguished from the teeth of M. latidens, and the rear 
from the teeth of M. elephantoides, he conceives that the distinc- 
tion established on detached teeth will be found to be erroneous. 
March 23.—A paper was first read, entitled, “ A Description of 
various Fossil Remains of three distinct Saurian animals discovered 
in the autumn of 1834, in the Magnesian Conglomerate on Durdham 
Down, near Bristol.” By Henry Riley, M.D. and Mr. Samuel 
Stutchbury; and communicated by Charles Lyell, Esq., P.G.S. 
The conglomerate in which these Saurian remains were discovered 
rests upon the edge of inclined strataof mountain limestone, filling 
up the irregularities of their surface, and consists of angular fragments 
of the limestone cemented by a dolomitic paste. The thickness of 
the deposit at the point where the remains were discovered does not 
exceed twenty feet. 
Of the three animals described in the paper, two belong to a genus 
for which the author proposes the name of Paleosaurus, and the third 
to one which they have called Thecodontosaurus. 
Third Series. Vol. 8. No. 50, Supplement, June 1836. 31L 
