280 
MOLLUSCA. 
few minute white spots on the sides, instead of being of a uniform colour. 
Specimens of A. depilans, which I have often taken (but never of so 
small a size), differ in being occasionally spotted as well as plain. But 
I have never met with this species of the same form as A. nexa, of its 
fine deep red colour, nor having any black border to the mantle, &c. ; nor 
has Ur. J. L. Drummond ever done so, though great numbers came under 
his examination when dredging at Donaghadee, on the coast of Down, in 
the summer of 1843. Hab. Belfast Bay, Ireland.* 
Genus Cylichna. 
C. strigella, Loven. Arran, Galway, Mr. Barlee. 
Genus Bulla, Linn. 
B. Lignaria, Linn. Generally distributed. 
B. Akera, Mont. Generally distributed. 
B. hydatis, Linn. Cork, Mr. Humphreys ; Galway, Dr. Farran. 
B. Cranchii, Leach. Cork Harbour, Mr. Humphreys ; Galway, Mr. 
Barlee ; Bangor, County Down, Mr. Hyndman. 
B. umbilicata, Mont. East, West, and South of Ireland. 
B. diaphana , Turt. 
Two specimens have been taken by Mr. Hyndman and myself, when 
dredging in Strangford Lough, and the species has been found by Mr. J. 
W. Warren at Portmarnock, on the Dublin coast. 
B. cylindracea , Penn. Generally distributed. 
B. truncata, Adams. Generally distributed. 
B. obtusa, Mont. Generally distributed. 
B. mammillata , Phil. 
Procured on the coast of Galway, in 1848, by Mr. Barlee. 
B. hyalina, Turt. 
Obtained at Portmarnock by Mr. Warren ; and in shell-sand collected 
at Bundoran and Ballysodare, on the western coast, by Mrs. Hancock. 
B. pectinata, Dillwyn, 
Has been found at Portmarnock, by Mr. Warren, and at Bundoran 
(County Donegal), by Mrs. Hancock. Mr. Humphreys of Cork notices 
it under Leach’s name, as procured by him there in the stomach of a sole 
( Solea vulgaris). 
Genus Bull^ea, Lamarck. 
B. aperta. Generally distributed. 
B. pruinosa, Clark. 
A dead specimen was obtained by George Barlee, Esq., by dredging on 
gravelly mud atBirterbuy Bay, in May, 1848, at a depth of from 12 to 15 
fathoms. 
* Aplysia depilans of British writers is not the A. depilans of the Medi- 
terranean. A. nexa is the young of the A. hybrida, Sow. ; the latter being the 
name adopted by Forbes’ and Hanley’s Mollusca. — Ed. 
