a12 G. W. LAMPLUGH ON SHELLY PATCHES IN THE 
22. On a Recent Exposure of the Suetty Patcuss in the BounpErR- 
oLaAY at Bripuineron Quay. By G.W. Lamptuen, Esq. With 
Nores on the Fossizs by Dr. J. Gwyn Jurrreys, F.R.S., F.G.S., 
KE. T. Newton, Esq., F.G.8., and Dr. H. W. Crossxzy, F.G.S. 
(Read February 20, 1884.) 
(Communicated by Dr. J. Gwyn Jeffreys, F.R.S., F.G.S.) 
[Puare XV.] 
Tue arctic Molluscan fauna obtained from Bridlington many years 
ago attracted the attention of many observers, and yielded results 
of great interest. But though the fauna was carefully studied, the 
deposit from which it came was comparatively neglected; and as 
that: part of the cliff from which the shells were first obtained was 
built over, in raising sea-walls for the protection of the town, soon 
after the bed was discovered, much misconception has arisen as to 
the nature and position of the deposit. And, the bed being inacces- 
sible to the later workers who established the present system of 
divisions in our Yorkshire drifts, it came to be described as a seam 
or bed of shelly sand in place, in the Purple Boulder-clay*. 
Two years ago, however, I was able to show’ that neither these 
shells nor those similarly found at Dimlington, near Spurn Point, 
had been obtained from beds in place, but from masses of sand and 
clay occurring as boulders in the Basement Boulder-clay. This I 
endeavoured to prove, not only by evidence collected during the 
building of a new sea-wall at Bridlington, but also by reference to 
the accounts of the beds themselves, given by their early investi- 
gators. 
But as there is still a tendency to hold that the Bridlington 
shells occurred in place, I am glad to be able to bring forward 
further evidence bearing on this point, and at the same time to 
add materially to our knowledge of the fauna of the deposit. 
During the early part of the winter of 1882-83 long-continued 
on-shore gales so far lowered the level of the beach opposite the 
town of Bridlington Quay, that the shore-deposit of sand and 
shingle was removed in many places, and the Boulder-clay below 
it well exposed on the foreshore, a circumstance of rare occurrence 
of late years, since groynes have been raised across the shore at 
right angles to the cliff to prevent such excessive beach-scour. 
The largest of these exposures was nearly opposite the place where 
the shells were first found in the cliff, and I have not before had 
an opportunity of examining this part of the beach. 
In this exposure, of which I give a ground-plan on p. 313, the 
shore-deposit of sand and shingle was, at one time or another, removed 
* Wood and Rome, ‘Quart. Journ. Geol. Soc.’ vol. xxiv. p. 149; Lyell’s 
‘Student’s Elements,’ 2nd ed. p. 169. 
t ‘On the Bridlington and Dimlington Glacial Shell-beds,” in Geol. Mag. 
vol. vill. p. 535, Dec. 1881. 
poMEAs. V. Wood in Quart. Journ. Geol. Soe. vol..xxxviii. p. 683, and letter 
in Geol. Mag. April 1882. 
