416 
CIRRIPEDA. 
II. SESSILXA. 
Genus Balanus. 
B. costatus, Mont. 
North, East, and South of Ireland. Cork Harbour, on Pinna, from 
deep water, Mr. Humphreys. 
B. Communis, Mont. 
Coast of Down, Mr. Hyndman. Dublin coast, W. T. Common on 
coast of Cork, on rocks, Mr. Humphreys. 
B. tintinnabulum, Linn. 
On drifted wood at Howth, Br. Turt. Cat. In Dublin Bay it has been 
found affixed to the Ostrea operculans, from which circumstance it is 
clearly identified as a British production, Turt. Con. Die. 75. Bottoms 
of ships in Cork Harbour, Mr. Humphreys. 
B. ovular is, Lam. 
In Halichondria celata, dredged with oysters in Belfast and Strangford 
Loughs, W. T. & 
Pigeon House, Killinchy and Killough, Br. Turt. Cat. 
Cork Harbour, Mr. Humphreys. 
Youghal, Dr. Ball. 
B. rugosus, Mont. 
Down coast, Mr. Hyndman. 
“ Dublin Bay and Portmarnock, common,” Turt. Cat. and C. D. 
B. Scoticus, Brown’s Illus., pi. 7, f. 22. 
This species or variety is found on Pecten maximus in the North, and 
on the Dublin coast by Dr. Farran, who remarks that he has obtained it 
only on this shell. Dredged off Belfast Bay, Mr. Hyndman. 
B. Candidas, Leach. 
Two specimens in Mr. Hyndman’s collection attached to Modiola vulgaris, 
taken in Belfast Bay by a Carrickfergus fisherman. 
Specimens of this fine Balanus, taken off the northern coast of Dublin, 
or between Carlingford and the Isle of Man, are in the collections of Mr. 
Warren, Dr. Farran, and Dr. Ball, of Dublin. The largest specimen is 
3 inches in height (not reckoning valves) and nearly as much in diameter. 
The species varies greatly in form, being sometimes much elongated, and 
of similar breadth from base to top, but is generally sub-pyramidal. Dr. 
Farran states that it is always adherent to Modiolus vulgaris ; and is 
brought up in the trawl-nets used in taking flat-fish. 
B, punctatus, Mont. 
Covering the rocks at Tory Island, G. C. H. 
Found at Carrickfergus ; common on the island of Ireland’s Eye, Dub- 
lin coast (W. T.), and at Youghal (Dr. Ball). 
Bangor, Co. Down, July 4th, 1846, G. C. H. and W. T. 
B. punctatus, Mont., is the species (and it only) covering over the entire 
beach and the base of the rocks at Ballyholme Bay. Looking across the 
bay it imparts a dull whitish (oaten-cake colour) appearance to the entire 
