200 
in itself a very handsome result of Mr. R. D. Darbishire’s one 
day’s dredging in Birterbuy Bay, and among the specimens 
are some choice species, as Eurynome aspera, Ebalia Bryeri 
and Cranchii and Atelecyclus heterodon. These and indeed all 
the other specimens, form valuable additions to the Museum 
collection, which promises soon to become really useful for 
study and reference. The plan adopted of showing the speci- 
mens dried, mounted on glass and enclosed in glass-lidded 
boxes, has been found quite satisfactory, preserving them 
both from dust and damage by handling, while by properly 
displaying several specimens of a species in different positions 
every part may be clearly seen. 
Mollusca . — The list of Mollusca which I have next to 
present contains 138 species, including those dredged in 
Birterbuy Bay ; the others are ali beach specimens, collected 
by Mr. Glover and Mr. Darbishire, or picked out since from 
the shell sand. 
The fact that 16 species of small land shells have been 
found in considerable numbers in the sand, along with the sea 
shells and foraminifera, may be worth notice; more or less 
of such an admixture is, I believe, not uncommon, but in the 
present case the proportions appear to be unusual, and the very 
great abundance of Helix pulchella is certainly remarkable. 
It should be mentioned, too, that Mr. Glover has collected 
from the sandy strip of ground separating Dogs Bay from 
Gorteen Bay many dead bleached specimens of Helix 
nemoralis and a few of H. aspersa remarkable for the great 
thickness and weight of the shells, in consequence of a very 
excessive deposition of calcareous matter in their substance ; 
no similar shells in the living state have been found in the 
neighbourhood, though carefully looked for. 
As to the sea shells, I shall mention only a few that have 
particularly attracted my notice. Otina otis was found on a 
mass of small living mussels brought by Mr. Glover. Csecum 
glabrum is very abundant in the sand, and I have picked out 
