184 COLLIER AND STANDEN! 
since his visit, but we discovered an equally interesting deposit, 
for, in several places where the action of the wind had cut a 
section through the sandhills, the old land surface was exposed 
underneath the overlying blown sand, and showed as an earthy 
layer about a foot deep, in which were embedded countless 
numbers of land shells in perfect preservation. From this layer 
we obtained the following species :—Vitrina pellucida, Hyalinia 
nitidula, Fly. pura, Hy. crystallina, Helix aculeata, H. nemoralis, 
HT. rufescens, Hl. concinna, H1. virgata, H1. ericetorum, H.. aspersa, 
Hf. pulchella, H. pygme@ea, Pupa muscorum, Vertigo substriata, 
V. angustior, Clausilia rugosa, Cochlicopa lubrica, Carychium 
minimum, Acme lineata—all the above were obtained by Mr. 
Darbishire, and given in his list, our additions being Hy. fudva, 
fly. cellarta, Helix hispida, Hl. caperata, Hl. acuta, and V. 
pygmea. We searched carefully for living examples of any of 
the above, but found none on the sandhills ; we, however, found 
on the outlying peninsula one example of 4. asfersa, and a few 
H. acuta, Hf. ericetorum, and P. muscorum, and on the road to 
Roundstone a few HA. nemoralis of ordinary character were 
noticed. ‘The search was carried on under favourable conditions 
—weather very wet and warm—and we could hardly have failed 
to find the shells had they been present. During our short stay 
our attention was confined entirely to Dogs Bay, and we had no 
time to search the immediate neighbourhood of Roundstone ; 
but our friend Mr. R. Welch, during a visit to the adjacent 
island of Inis Macdara, obtained specimens of Ba/ea perversa, 
Amalia gagates var. plumbea Moq., Pupa cylindracea var. curta, 
and a small dark form of He/¢x ericetorum. 
The sections in the sandhills enabled us to study the 
history o1 the large and massive semi-fossil AZ. wemoralts, for 
which Dogs Bay is specially noted, and which undoubtedly 
belongs to a gigantic race of shells which at one time existed 
here, and was apparently overwhelmed by some great sandstorm. 
The shells occur in a layer composed of clean sand, foramin- 
ifera, and finely comminuted shells, about three feet deep, lying 
J.C., viii, April 1896. 
