BELFAST DREDGING COMMITTEE. 297 
Species. Observations. 
GasTEROpoDA PRroso- 
BRANCHIATA. 
; there appears to have been no diminution in the 
supply until this last season, when it is stated they 
are not so plentiful as formerly. 
Littorina littorea ......... dead |In the alluvial deposits. I have found these shells in 
a sandy beach on the banks of the Blackwater 
(Blackstaff), nearly two miles beyond the present 
highest reach of the tide. 
—— rudis ............ -+eee4| living Common on rocky ground a little below high water 
mark. 
—— patula ...........+...| living |Common in similar localities as the last. 
——littoralis .......00.0. living |Common among fuci on rocks and stones between tide 
marks. 
Lacuna pallidula .........] living |Common on laminaria. 
Vincta ....,......s...| living |Same as the last. ; 
—— crassior .,....+.+......| living |Rather rare, on laminaria, &c., in deeper water than the 
two preceding. 
Rissoa striatula ............ dead /Rare, in shell sand from deep water. 
— Zetlandica...... -+...| dead |Rare, with the last. 
crenulata .........0. .| dead |Rare, do. 
=—— CalathusS Jississsccas dead |Rare, do. 
— Beanii ...............] dead |Abundant, do. 
—  punctura ............) dead |Scarce, do. 
— costata .......... ssss.| dead |Scarce, — do. 
— striata ...............] dead |Abundant, do. 
—— 4, __— seseeesseseees.| living |Common between tide marks. 
—— Parva......+0+...+++...| living [Common on sea-weed. 
Bete reins Gogo oaecns dead |Common in shell sand. 
interrupta ............| living [Common between tide marks. 
| ——labiosa ....,..........| living |Abundant on banks where Zostera grows. 
— rufilabrum............ living |Scarce on seaweed between tide marks. 
; — cingillus LEC, living Common under stones near low water. 
” ME DG siliississsios..: living |Profusely scattered over the muddy shores left dry be- 
tween high and low water. 
In summer it is the chief food of the grey Mullet, which 
is taken in the channel leading to the Docks. In 
winter various sea-birds feed upon it. 
_| Skenea planorbis .........| living [Common on seaweed near low water. Found also in 
eg 
b 
the stomachs of grey Mullet. 
uy 
| Turvitella communis ......| living [Frequent in from 10 to 20 fathoms. 
|— than AS dead |In the alluvial deposits, of much larger size than any 
now found living. 
‘Cacum glabrum ......... dead |Rare, in shell sand from deep water. 
Aporhais pes pelecani ...| living (Common in 10 to 25 fathoms. 
| Cerithium reticulatum ...| living |Abundant on the muddy banks between tide marks. 
—= ..| dead Common in the alluvial deposits. 
adversum seeseeseeeee) Gead [In shell sand from deep water. 
di Scalaria Turtoni ......... dead |Rare. In the alluvial deposits ; in one instance several 
were found together. Not known as now living in 
the Bay. 
—— communis............] dead |Rare in shell sand from deep water. 
clathratula .........] dead |Rare, with the last. 
c is unica............ss...| dead |Very rare, same as last. 
tlima polita..............., dead /Rare, in deep water. 
— = distorta..... ssessssaee] Gead |Rare, in shell sand from deep water. 
Not uncommon, with the last. 
Rare, off Groomsport. (Edward Waller, Esq.) 
Rare, in shell sand from deep water. 
Rare, Bangor. 
Rare, in shell sand from deep water. 
Q2 
