LAMELLIBRANCHIATA. 345 



T. cr asset, Penn. 



Bantry Bay and Dublin coast ai'e 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 Ballysodare, 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 PIcurotoma 

 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. hiinaculata, Linn. 



The species marked with doubt in Turton's Catalogue, as found in the 

 " South of Ireland ; very rare." Dr. R. 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 infoi'ms me, in Mr. Jeffreys' collection at Swansea. 

 Galway, Mr. Barlee. 



Genus Lucina. 

 i. radula, Mont. 

 Dublin coast and Cove, Turt. Br. W^idely 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.). Red 

 Bay, Co. Antrim. 



Lake of brackish water, in largest of South Isles of Arran, Dr. R. Ball 

 andW. 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 



