LAMELLIBRANCHIATA. 
345 
T. crassa , Penn. 
Bantry Bay and Dublin coast are known as habitats for this species ; 
the former, as in the case of the last species, apparently its chief 
abode. Single valves dredged in Belfast Bay, from 10 to 12 fathoms, on 
soft sand, by Mr. Hyndman. Obtained at Balbriggan, Co. Dublin (a 
single specimen), and at Ballvsodare, Co. Sligo, Mrs. W. J. Hancock. 
Sana Island, 1841, Mr. Hyndman. 
T. balaustina, Linn. 
A living specimen and two valves of this species, as determined by Mr. 
G. B. Sowerby, were dredged from about 14 fathoms with JPleurotoma 
teres, in Birterbuy Bay, by Mr. Barlee, in the summer of 1845. It has not 
before been noticed as inhabiting any of the coasts of the British islands. 
T. bimaculata, Linn. 
The species marked with doubt in Turton’s Catalogue, as found in the 
“ South of Ireland ; very rare.” Dr. B. Ball notes his having a specimen 
from Bantry Bay, and one from the coast of Clare (Prof. Harvey) ; one 
obtained alive at Ardmore, Co. Waterford, by Mr. Warren : three spe- 
cimens thence are in his collection, one found at Pilltown estuary, Co. 
Waterford, by Mrs. Mackesy, and two near Youghal by Mrs. Moss of that 
town (Farran in letter). 
T. solidula, Mont. 
Dublin coast, Br. Turt. A common species in shallow water, and be- 
tween tide-marks on sand (at Magilligan) and ooze (in Belfast Bay). 
Dundalk Bay, where it is of a fine yellow hue, Mrs. Hancock. 
T. pygmcea, Phil. 
Specimens procured on the coast of Cork, by Mr. John D. Humphreys, 
are, as Mr. S. Hanley informs me, in Mr. Jeffreys’ collection at Swansea. 
Galway, Mr. Barlee. 
Genus Lucina. 
L. radula, Mont. 
Dublin coast and Cove, Turt. Br. Widely distributed round the coast, 
but not obtained in quantity. Dredged from about 6 to 12 fathoms on 
sand in Belfast and Strangford Loughs (Mr. Hyndman and W. T.). Bed 
Bay, Co. Antrim. 
Lake of brackish water, in largest of South Isles of Arran, Dr. B. Ball 
and W. T., 1834. Ballysodare Bay, County Sligo, Mrs. Hancock. Dredged 
in Clew Bay, 1840. 
L. rotundata, Mont. 
Bantry Bay, Br. Turt. This is the only locality known to me for this 
species, and it is not rare here, excepting Birterbuy Bay, where it was 
found by Mr. Barlee, in 1845. 
L. lactea, Lam. 
Procured off the South-West coast, by Mr. M‘Andrew; off Baltimore 
Harbour, 30 fathoms ; and from 12 to 15 fathoms in Bantry Bay. 
L. spinifera, Mont. 
The species noticed with doubt in Turton’s Catalogue as found at 
“ Portmarnock ; very rare.” About 1834, it was noted similarly (excepting 
