90 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [ Dec. 8, 
to find pebbles of rocks of various ages. He commented on the 
difficulty paleontologists seemed to labour under in determining a 
fossil if it came out of a pebble instead of from a rock the position 
of which was definitely known. He adverted to the statement that 
the beds containing the pebbles had been deposited in the New-Red- 
Sandstone sea, whereas Mr. Godwin-Austen had regarded the New 
Red deposits as formed in large inland lakes; and the local cha- 
racter of the beds supported this latter view. 
Dr. Duncan defended the caution of paleontologists, and remarked 
on the uncertainty attending the determination of casts. 
Mr. Prestwich was glad that some other source had been sug- 
gested for the quartzite pebbles. He had found somewhat similar 
quartzites between Lisieux and Cherbourg, in France. 
The Prusrpent observed that he would lke to see the rise of a 
new race of paleontologists relying simply on zoological charac- 
teristics, and not on geological position. A considerable simplifica- 
tion of our classification would probably result. 
Mr. Eruerince briefly replied. 
2. On the Retarion of the BoutpErR-ciay, without Cuaux, of the 
Norrn of Enewanp to the GREAT Anon neat of the 
Souru. By Szarres V. Woop, Jun., Esq., F.G.S. 
Puate VII. 
In a paper read before this Society by myself and the Rey. J. L. 
Rome, F.G.8., and published in the Journal, we described the 
Glacial clay of the Yorkshire coast as consisting of two main 
parts*. Of these, the lower, distinguished both in our sections and 
in the vertical section accompanying the present paper (see Pl. VII.) 
by the letter a, presents characters identical in all respects with the 
ordinary Boulder-clay, with chalk as its prevailing constituent, 
which forms the uppermost member of the Glacial series of the 
east and east centre of England; while the upper (c) is a purple 
clay, in which chalk is only a subordinate constituent, even in the 
lower part, and which, gradually losing its chalk upwards, is in the 
upper part entirely destitute of it. We also endeavoured to show 
that, north of Flamborough Head, the whole of the clay, (which is 
destitute of chalk), belonged to this upper part only-—and that, 
though lying at the foot of the northern escarpment of the chalk, 
as well as enveloping both the escarpment and the Wold, this clay, 
thus destitute of chalk, was not deposited until, by the complete 
submergence of the Wold, all source of chalk débris had been re- 
moved. We also suggested that the absence of any clay with chalk 
débris in these parts was due to their having been occupied by ice 
during the time that the clay containing that material was accumu- 
lated, and to this ice not having been removed until the Wold had 
been completely covered by the sea; and we identified this chalk- 
* Vol. xxiv. 146. The Hessle clay there described is a separate deposit 
from the Glacial. clay referred to in the paper, and is regarded by us as of Post- 
glacial age. 
