70 Proceedings of Philosophical Societies. [Juty, 
it belonged to an aquatic animal, and if compared with the 
osteology of the whale, it bears some resemblance to the jaw 
of a small subject of that tribe, and still more to the rib of a 
large one. It is not improbable, however, that it has belonged 
to a genus very distinct from any we are now acquainted with. 
A smaller bone, procured near the same place, resembles part 
of the spine of a large animal, and may have belonged to the 
bone of the same individual with that in question. 
Observations on the Strata of Tilgate Forest, in Sussex. By 
Gideon Mantell, Esq. MGS. 
This paper is an abstract of a more detailed account which 
has, since the last meeting of the Society, been published in the 
author’s work on the Geology of Sussex, and is intended merely 
to illustrate a series of specimens now presented by him to the 
Society. 
Notice on the Stonesfield Slate Pits. By Henry Hakewill, 
Esq. MGS. 
The quarries from whence the specimens referred to in this 
communication were obtained, are in the village of Stonesfield, 
situated about three miles north-west from Woodstock, in Ox- 
fordshire, on the north bank of the valley, in which the river 
Evenlode runs, and at a considerable elevation above the river, 
The strata from which the Stonesfield s/ates are made, occur at 
about 60 feet from the surface of the earth, and are worked by 
means of shafts sunk to that level, and the vee (as the bed 
sought after is called) is followed in an excavated gallery: 
the pendle, which is the name given to the bed from which the 
slates are made, consists of two distinct strata, separated by a 
eravelly vein of about a foot and a half thick called race; the 
upper course of the slatestone is about 10 inches in thickness, 
with excrescences of a circular form attached to it, called by the 
workmen bolt downs, or whims. 
The lower stratum of the pendle is one foot thick, and upon 
its upper surface are excrescences of a similar form, called caps. 
In the race are found numerous spherical nodules, flattened at 
the sides, six inches to four feet in diameter, but most com- 
monly about two feet. Immediately above the pendle, there is 
occasionally a coarse stone, and in the pendle itself are found 
those interesting remains of animals, which have drawn the 
attention of geologists to this spot. 
The slates are made from the stone dug in the summer, and 
brought to the surface, and spread out with the grain exposed 
to the weather; and, during the winter, it is frequently watered ; 
the frost assists materially in dividing it into slates. 
June 7.—A letter was read, accompanying specimens from 
Dr. Wallich of the Residency of Napal. 
_'These specimens were brought from Mucktinath, a place at a 
distance of about 20 days’ journey nerth-west from the valley of 
Napal, and probably at a very considerable elevation ‘above it. 
