LAMELLIBRANCHIATA. 
351 
Capt. Brown noticed as localities — “ in a stream near Clonooney ; in the 
Grand Canal, and in the Liffey, plentiful,” p. 508 ; in this river it attains 
a very large size. In the river Main, near its junction with Lough 
Neagh ; in the rejectamenta of this lake near Toome, and in that of the 
river Lagan, near Belfast, I have found the P. amnicum. Ballitore 
(County Kildare), Limerick, and Miltown Malbay, are noticed by Pro- 
fessor Harvey as localities. From the river Barrow, near Portarling- 
ton, the species has been sent me by the Rev. B. J. Clarke. 
Pisidium cinereum, Alder, 
Is not common, but is widely distributed in Ireland, being found in the 
North, East, West, and South. In Sept., 1833, I first met wdth it in a 
moist spot in the wood at Holywood House, County Down, and have since 
obtained a very few specimens in different parts of this County and of 
Antrim. Among Pisidia collected at Youngrove, near Middleton (County 
Cork), by Miss M. Ball ; at Killereran (County Galway) and Portarling- 
ton, by the Rev. B. J. Clarke ; and in the neighbourhood of Dublin, by 
T. W. Warren, Esq., is the P. cinereum. 
Genus Astarte. 
A. Danmoniensis , Sow. 
Bray and near the Giant’s Causeway, Turt. Br. 
Dredged off the Co. Antrim coast ; in Belfast and Strangford Loughs 
sparingly, from about 8 to 25 fathoms, on mud and sand, Mr. Hyndman 
and W. T. Appears to be extremely scarce at Youghal and Cork, where 
it has been met with in the South. Not included in any of my western 
lists. 
A. Scotica, Flem. 
“ Dredged at Bray ; not common,” O’Kelly. All the remarks in the 
last apply equally to this. 
Genus Artemis. 
A. exoleta , Linn. 
Dublin coast, Br. Turt. Common on most sandy coasts. 
Dredged from 5 to 10 fathoms on sand in Belfast and Strangford 
Loughs, Mr. Hyndman and W. T. 
Larne Lough, W. T. ; Ballysodare, Co. Sligo, Mrs. Hancock. 
A. lincta, Pult. 
Taken as last and in same localities. 
A. undata , Penn. 
Dublin coast, Belfast Bay, western coasts, Br. Turt. Not uncommon 
on most sandy coasts. In addition to the places indicated, obtained in 
Killery Bay in 1840. 
Genus Cytherea. 
C. ovata (Br. Turt.). 
A rather common species. Dredged alive in Belfast and Strangford 
Loughs, from 10 to 20 fathoms on oozy ground. Larne Lough, Mr. 
Hyndman and W. T. Dredged in Killery and Clew Bays in 1840. 
