178 
strewn shells compared with the two seasons preceding. 
Stormy weather was not so frequent or so powerful, and 
there was an absence of the great rollers which effectually 
plough up the seaweed and shingle from the banks lying 
about two miles off the shore. As a rule, great storms 
bring the fruitful harvest for the naturalist. Searching 
these sandy shores after ordinary or quiet tides is generally 
an unprofitable labour. 
Thirty-three species have been added to the former lists 
from this locality, during this season. Amongst the foreign 
things which came up in the dredge were valves of Perna 
ephippiuvi and a young chama, relics from a wreck which 
took place in the bay a few years back to a vessel laden 
with pearl shells from the Indies. At present one part of 
the rocky bay is strewn with the great valves of the large 
Pernse, the rocky bottom preventing them from being 
dredged. 
ADDITIONAL SPECIES. 
155. Pholas dactylus ; rare. 
156. Saxicava arctica; several dredged and living shells agi’ee so 
well with the figures and descriptions of authorities, that I 
do not hesitate to identify my specimens with the species. 
Forbes gives Anglesea as a locality for it. 
157. My a arenaria; found on the shore at Aberffraw. 
158. Solecurtus Candidas j found also at Aberffraw. 
159. Tapes virginea ; dredged. 
160. Venus casina; dredged alive. In the “Corrections” which I 
communicated to the Section, March, 1876 (Proc. vol. xv. 
p. 139), this species was eliminated under the impression 
that my former specimens were worn Venus verrucosa. 
However that may be, these present living specimens prove 
that V. casina is native in the bay. 
161. Astarte sulcata; dredged living of good size. A very young 
one had previously been found on the shore. 
162. Astarte triangularis; three valves of this well-marked species 
were found in an oyster boat. 
