^64 I'OSSIL REMAINS OF QUADRUPEDS, &C. 
bone of a goose, or large duck ; and Professor Buckland 
has wingrbones of a raven and a large pigeon, distinctly 
characterised. 
The cavern, which is minutely described in the Geologi- 
cal Survey, p. &c. is a long and narrow opening in 
the oolite limestone, on the banks of Hodgbeck, scarcely 
a hundred yards to the south-east of Kirkdale Church, and 
about a furlong from the place where the strata, which 
gently dip toward the south, sink under the deep alluvium 
of the Vale of Pickering. The opening was discovered by 
some workmen employed in quarrying the rock, on the side 
of the bank, where the broken edges of the strata are 
covered with alluvium, forming a slope rather steep. The 
entrance is abopt 1 00 feet distant from the heck or rivulet, 
86 feet above its level, and 30 feet below the level of the 
top of the bank above the quarry. It has been traced in- 
ward, in a direction nearly horizontal, above ^50 feet, in- 
cluding 45 feet laid open by the operation of quarrying. 
The breadth of this aperture varies from two or three feet 
to six or seven. In two places, the height is such as to 
allow persons to stand upright ; in some other parts, we 
may walk stooping ; but i|:i most places, it is necessary to 
walk on our hands and knees ; and in some spots, the roof 
is so low, that there is no passage but by crawling along 
the ground. 
Some parts of the cave present obvious marks of fracture 
and dislocation ; and it is traversed by cross fissures in va^ 
rious directions. Yet it is not a mere fissure in the rock, 
as is evident from the want of correspondence between the 
opposite sides, and from the existence of a number of round- 
ed hollows or depressions, appearing in the sides, the floor, 
and even the roof; resembling such water-worn hollows as 
we see in rocks in the beds of rivers, or on the shores of 
the ocean. The roof is for the most part quite solid, and 
