IDISCOVERED AT ICIEKDALE, YORKSHIRE. 269 
land, found there, in the seams between the strata of the 
magnesian hmestone, two teeth, and several fragments of 
tihs and other bones. One of the teeth appears to have 
been broken or lost; the other (of which an exact model is 
preserited to the Society) was given me by Mr Thomas 
Baker, the conductor of the quarry. On my way to 
Edinburgh, last week, I visited the spot, along with Mr 
Baker, and the foreman of the quarry, by whom the teeth 
and bones were found. The place, as stated in the Geo- 
logical Survey, p. 322, is about sixty-five feet below the 
surface of the ground, from ten to tw^enty feet, or more, 
below the surface of the solid rock, and above an hundred 
yards from the original face of the quarry, which is towards 
the bank of the river Wear, fronting the north. The strata 
have a gentle dip to the south, becoming lower as they re- 
cede from the river. There is no vestige of any cave, at 
the spot where the animal remains were found ; nor of any 
perpendicular fissure, by which they could have fallen down 
from the surface ; nor of any open lateral channel, by which 
they could be washed into the position which they occupied : 
but they were found imbedded in a kind of mud, which 
fills up the seams or horizontal interstices between the beds 
of limestone. The mud, which is somewhat sandy, rarely 
exceeds two or three inches thick ; but it is of very irregu- 
lar thickness, as it accommodates itself to the surface of the 
limestone beds ; and these, instead of being smooth, are 
generally marked with numerous hollows or dimples, which 
the mud fills up. The bones were not found in any one 
seam, but in a variety of seams, at various depths, some 
being ten or twelve feet lower than others ; nor was there 
any visible communication between the higher seams and 
the lower. Being anxious to ascertain whether any more 
bones could be found, I directed some of the seams to be 
examined in my presence ; and, after a considerable search, 
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