Nichols — A List of the Marine Mollusca of Ireland. 497 



Lepidopleurus cancellatus (G. B. Sowerby, jun.). {Chiton cancellatus, 



Jefeeys, B. C.) 



i., ii., ; ?iv., v., . 



i. N. E. coast (Hyndman and Thompson, f. Thompson, '56) : oS 

 Larne, 18 fms. (Jeffreys, '59) : off Maidens, 70-90 fms., living 

 (Hyndman, '59) : between Maidens and Isle of Muck, 20 fms., 

 living (Hyndman, '59) : Belfast Lough, living (Hyndman, '58, 

 '60) : Strangford Lough (Hyndman, f. Thompson ms.). 

 ii. Newcastle, co. Down (Hyndman, f. Thompson iis.). 

 iv. ? Dingle Bay (Leach, '52, sub Chitoti tuherculatus). 

 V. "West of Ireland (Jefeeys, '65) : Roundstone (Alcock, '65). 

 Distribution. — Pinmark to Mediterranean. ITew England. 



Lepidopleuru8 onyx (Spengler). {Chiton cinereus, Jeffreys, B. C.) 



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



i. Generally distributed. 



ii. I^ewcastle, co. Down (Thompson irs.) : Dublin coast, generally 



distributed: Greystones (Mackintosh, '84). 

 iii. Toughal (Leach, '52) : E. I. A. Exp., 1885, off Galley Head, 



54 fms. (Chaster, '98). 

 iv. Bantiy Bay (Leach, '52; Dublin Mus.) : Dingle Bay (Leach, '52) : 

 "Porcupine" Exp., 1869, 808 fms. (Jeffreys, '82): E. L A. 

 Exp., 1885, 1886, 5-108 fms. (Swanston, '86, A. E. K). 

 V. Birterbuy Bay, living (Walpole, '52): Killary and Clew Bays 



(Thompson ms.) : off Achill (Dublin Mus.). 

 vi. Ards, Drimnacraig, &c., co. Donegal (Hart, '92). 

 Distribution. — Iceland. Finmark to Spain. 



Trachydermon albus (Linne). {Chiton albus, Jeffreys, B. C.) 



i. North of Ireland (Thompson, '56) : Belfast Lough, living (Hynd- 

 man, '58 ; Belfast Mus., f. Praeger, '89) : Strangford Lough 

 (Stewart, f. Praeger, '89). 

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

 America. N. "W. America. 



Trachydermon cinereus (Linn6). {Chiton marginatus, Jeffreys, B.C.) 



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



Common all round the coast, under stones, &c. 

 Distribution. — Iceland. Loffoden I. to Mediterranean. Mogador. 

 S. Africa. Greenland. N. E. America. IST. "W. America. 



