222 
REPORT—1857. 
Species. 
LAMELLIBRANCHIATA. 
Syndosmya intermedia ... 
—— prismatica............ 
Scrobicularia piperata ... 
living 
living 
dead 
Mactra solida,.......+....+.] dead 
— truncata cevseeeee| living 
—- elliptica......... ..+»| living 
OF. eevee seven] dead 
Lutraria elliptica sesseseee| Gead 
—— oblonga...............| dead 
Tapes decussata.........+++ dead 
pullastra ....06...++- living 
sonata, MMO Td ob dead 
—— VIFginea..........0006. living 
Py i vacseonceons dead 
var. Sarniensis ......| living 
BULCA veseeesereeereeens living 
—— iy cnnteeeee eapebeke J dead 
Venus Casina ........eeeeeee living 
—_ PM er. dead 
— striatula ............| living 
—— fasciata ..... eeuecbous living 
OVALA se. seseeeseeesees living 
——_ nerves sodeaekt +| dead 
Artemis exoleta............ dead 
lincta......... ce dead 
Lucinopsis undata.........| dead 
Cyprina Islandica ......... living 
SSSe gal rat techs dead 
Circe minima............... dead 
Astarte sulcata .....+...++- living 
— var. Scotica, smooth- 
edged ......++ +.seeee living 
—— triangularis ......... dead 
Cardium echinatum ...... 
— edule............ aie 
— nodosum ........++ i 
——  PYSMLUM «2. .eeeeee 
Suecicum ....... AucDS 
—— Norvegicum .......+- 
dead 
dead 
Observations. 
Rare, in the deeper water. 
Rare, in 20 fathoms off Black Head. 
Common in the alluvial deposit. At a depth of 30 feet, 
in sinking a well at Durham Street Mill. At 18 feet 
at Linfield Mill. On the muddy banks of the river 
Lagan nearly as far up as the tide now flows. Has 
not been found living, but is probably to be found. 
A single valve dredged up off Castle Chichester, and 
odd valves off Bangor. 
On sandy shores between tide marks. 
In 20 fathoms, not uncommon. 
In shell sand from deep water, common. 
On both sides of the Bay and in the alluvium, not un- 
common. Probably living, but inaccessible to the 
dredge. Common in the alluvium, 
Rare, in the alluvial deposit. 
Rare, in the alluvial deposit, of large size. 
known to be now living in the Bay. 
Common on both sides of the Bay. 
Abundant in the alluvium. 
Not common, in from 10 to 20 fathoms. 
Common throughout the Bay at various depths, with 
the valves fresh and united, and also in the alluvium. 
Rare, off Bangor. 
Common in sandy beaches between tide marks. 
In the alluvial deposits. 
Frequent in 20 fathoms. 
Common in the deeper water. 
vium. 
Common from low water mark to 20 fathoms. 
Not uncommon from 10 to 20 fathoms on both sides 
of the Bay. 
Rare, in 20 fathoms off Black Head. 
Abundant in shell sand from deep water. 
Scarce, in about 10 fathoms on both sides of the Bay. 
On the shore at Cultra single valves are thrown up 
by the tide. Probably still living. 
Not uncommon with the valves united on both sides 
of the Bay. Also in the alluvial deposits. Probably 
living. 
Not uncommon in 5 to 10 fathoms. 
size in the alluvial deposit. 
Rare, in 20 fathoms. 
Frequent, of various sizes. 
Rare, in shell sand from deep water. 
Common in 10 to 20 fathoms, both sides of the Bay. 
Not 
Not found in the allu- 
Of very large 
Rare, with the last. 
Abundant in shell sand from deep water. 
A smooth-edged variety of this, as well as of the 
preceding. Query.—Can the difference be 
sexual ? 
Not common. In from 10 to 20 fathoms, valves often 
united. 
Common on sandy shores, but not in sufficient numbers 
to be gathered for sale. 
Rare, in 10 to 20 fathoms. 
Rare, in 10 fathoms. 
Rare, in shell sand from deep water. 
Rare, in 10 to 20 fathoms. 
