50 LITTORINID.E. 



Leach : said to have been found at Dunbar by Laskey 

 an authority not to be relied on, seeing that Tellina 

 carnaria, Amphidesma 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. disjunctus, Mont.). West-Indian. 



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

 Fergus's Bay, Peterhead (Bingham, ^efe 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 were 

 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. mamillata, and A. Fremingvillea, 

 Risso=.R. cancellata, Desm.=.R. 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 f Andrew); Adriatic (Heller); Mediterranean (Pay- 

 raudeau and others) ; JEgean (Spratt) . 



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

 costatus, Don.: Margate (Donovan); Weymouth (Bryer); 

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



