50 littorinidtE. 



Leach : said to have been found at Dunbar by Laskey 

 — an authority not to be relied on, seeing that Tellina 

 carnaria, AmpMdesma nitens, Siliquaria bidens, and 

 several other exotic shells are enumerated by him from 

 that locality ; Dunbar also (Bingham, fide Brown) ; 

 Cork (Leach) . It is a common Mediterranean shell. 



2. R.disjuncta (T. disjimchts, Mont.). West-Indian. 



3. R. Montayui, Payr. = R. Binghami, Brown : St. 

 Ferguses Bay, Peterhead (Bingham, ^c?e Brown) . Medi- 

 terranean and Adriatic. 



4. R. glabrata, v. Miihlf. = R. punctulum, Phil. = R. ni- 

 tida, Brusina : Shetland and Skye (J. G. J., in conse- 

 quence of sifting shell- sand through sieves which Avere 

 not properly cleaned after I had used them on the Pied- 

 montese coast). Mediterranean and Adriatic. 



5. R. cimex [Turbo, L.) = T. calathiscus, Mont. = 

 Alvania Europea, A. mamillataj and A. Fremingvillea, 

 Risso=i?. cancellata, Desm.=i?. granulata, Phil. : Isle 

 of Jura (Laskey); Cumbrae (J. Smith). Mediterra- 

 nean and Adriatic. 



In the same category may be placed several species of 

 Rissoina, a genus instituted by D^Orbigny to receive 

 certain shells allied to Rissoa, which have the lower part 

 of the mouth slightly channelled, and the operculum 

 furnished underneath with a process like that of Neri- 

 tina. There is no British species of Rissoina. Those 

 erroneously recorded as such are : — 



1. Rissoina Bruguieri, Payr.: Scarborough (Bean). 

 Loire-Inferieure (Cailliaud) ; north coast of Spain 

 (M'Andrew); Adriatic (Heller); Mediterranean (Pay- 

 raudeau and others) ; jEgean (Spratt) . 



2. Rissoina Bryerea {Turbo Bryereus, Mont.) = T. 

 co5/a^2<5, Don. -.Margate (Donovan); Weymouth (Bryer); 

 Dunbar (Laskey) ; Cornwall, Portmarnock, and Firth of 



