498 Proceedings of the Royal Irish Academy. 



Callochiton Icevis (Montagu). {Chiion Icevis, Jeffreys, B. C.) 

 i., ii., iii., . v., . 



i. Belfast Lough (Hyndman, '58 ; Belfast Mus., f. Praeger, '89) : 

 Donaghadee (Drummond, f. Thompson ms.) : Strangford Lough 

 (Brown, '44 ; 7-20 fms., living, very rare, Dickie, '58), 



ii. Portmamock (W., W., & W., '18*) : Dublin Bay (Turton, '19) : 

 Dalkey Sound, rare (Walpole, '53a). 



iii. Toughal (Miss M. Ball, f. Thompson ms.) : Baltimore, living 

 (A. E.K). 



v. Lahineh (Thompson us.) : Birterhuy Bay, living ("Walpole, '52) : 

 Clew Bay (Thompson ms.). 

 Distribution. — Pinmark to Mediterranean. 



Tonicella rtilra (Linne). {Chiton ruber, Jeffreys, B. C.) 

 i., ii., iii., iv., . . 



i. Grenerally distributed. 



ii. JS'ewcastle, co. Down (Hyndman, f. Thompson ms.) : Carlingford 

 (Thompson ms. ; "^Yaller Coll. in Dublin Mus.) : Lambay 

 Island (Thompson MS.) : Dublin Bay (Ball, f. Thompson ms.): 

 Dalkey Sound and Killiney, rare (Walpole, '53a). 



iii. Toughal (Ball, f, Thompson ms.). 



iv. Bantry (Ball, f. Thompson ms.) : R. I. A. Exp., 1885, Bere- 

 haven, 5-25 fms., rare (Swanston, '86). 

 Distribution. — Iceland. Pinmark to English Channel. Greenland. 



N. E. America. IS". W. America. Gulf of Tartary, 



Tonicella marmorea (Pabricius). ( Chiton marmoreus, Jeffreys, B. C.) 



i., ii., .... 



i. On oysters from Greencastle, Londonderry (Thompson, '56) : 

 Belfast Lough, living (Hyndman, '58) : Groomsport (Thomp- 

 son MS.) : Bangor (Patterson, f. Thompson, '56) : Donaghadee 

 (Drummond, f. Thompson ms.) : Strangford Lough (Hyndman 

 and Thompson, f. Thompson, '56 ; Stewart, f. Praeger, '89). 

 ii On oysters from Carlingford (Thompson, '56) : ? Salthill, Dublin 

 Bay (TValpole, '53a): Dublin Bay, rare (Kinahan, '61). 

 Distribution. — Spitzbergen. Iceland. Pinmark to British Isles. 

 J^.E. America. Mexico. 



