Nichols — A List of the Marine Mollusca of Ireland. 499 



Class.— GASTEROPODA. 



Order.— PEOSOBEAI^CHIATA. 



Family. — A cm^id^ . 



Acm(sa testudinalis (Miiller). {Tectura testudinalis, Jeffreys, B.C.) 



i., ii., . . . vi. 



i. Generally distributed. 



ii. ISTewcastle dead, Bloody Bridge living, and Glassdnimmond 

 (Thompson, '56): Dublin coast (Hassall, '42 ; &c.): Greystones 

 (Adams, '78) : east coast of Ireland (Thompson, '56). 

 vi. Mweelfinn, Sheephaven, rare (Hart, '92). 



Distribution. — Arctic seas to British Isles. Greenland. N. E. 

 America. 1^. W. America. Mexico and IN". E. Asia (Jeffreys). 



Acm(^a virginea {W^Qx). {Tectura virginea, Jeffreys, B.C.) 

 i., ii., iii., iv., v., vi. 



Generally distributed round the coast. 



Distribution. — Iceland to St. Helena. Mediterranean. 



Eamily. — Lepetid^. 

 Pilidium fulvum (Miiller). {Tectura fulva, Jeffreys, B.C.) 

 i., . iii., iv., [v.], . 



i. Off Ballycastle, dead (Chaster, '97a) : Turbot Bank, dead, rare 



(Dickie, f. Hyndman, '58). 

 iii. On a stone dredged in deep water at Youghal (Miss M. Ball, f. 



Thompson, '56) : coast of Cork on Pinna (Humphreys, f. 



Eorbes & Hanley, '53): E.I. A. Exp. 1885, off S. coast of 



Cork, 391-521 fms. (Chaster, '98). 

 iv. Off Cape Clear and Mizen Head, 50-60 fms. (M'Andrew, f. 



Eorbes & Hanley, '53) : " Porcupine " Exp. 1869, 85-110 fms. 



(Jeffreys, '82): E. I. A. Exp., 1885, 1886, 5-79 fms. (Swans- 

 ton, '86, Chaster, '98, A. E. N.) 

 V. West of Ireland, 100 fms. (King, '62): "Porcupine" Exp. 1869, 



165 fms. (Jeffreys, '82). 

 Distribution. — Arctic and northern seas of Europe and Eastern 

 America. Azores, " Challenger." Off Tripoli, " Shearwater." 



