126 



PRor. T. m'kenny hughes 



ments of limestone that might happen to have been in it. No 

 distinction had been drawn between this marine drift (itself remanie 

 from older glacial deposits) and the modified or even re-sorted upper 

 part of this marine drift. 



Fig. 4, — Lower left-Tiand corner of Section seen in fig. 3, looTcing 

 north-north-west. (From a photograph by Mr. Helsby.) 



a. Bedded sand belonging to marine drill wliich lias sunk in towards the 



swallow-hole, 



b. Angular and weathered fragments of limestone from the broken-down wall 



and roof of the cave. 



c. Loam, in places standing vertical from the settlement of the mass. 



d. Large block of limestone (shown also in figs. 2 and 3), which barred 



further progress into the northerly extension of the cave. 



With the strong suspicion that I had in my mind of the unsatis- 

 factory character of the evidence that the cave-deposits were earlier 

 than even the submergence, this was, I thought, a point of some 

 importance, seeing that, in the first place, it bore upon the ques- 

 tion as to whether the beds had been correctly identified ; secondly, 

 because the removal of many feet of superficial deposit would leave 

 the rock nearer the surface ; and thirdly, because the character and 



