Mollusks. 5711 



Shells, and Mr. Mac-Andrew has likewise taken it in the Firth of 

 Clyde. 



Neaera cuspidata {Corbula cuspidata). Has been taken off the 

 Isle of Bute by Mr. Smith, of Jordan Hill. 



Fam. VI. Apatinida. 



Thracia phaseolina {Thracia declivis, Anatina declivis). Very 

 sparingly distributed : it occasionally occurs on the shores of Arran 

 and Cumbrae, in the Laminarian Zone. A series is in the British 

 Museum, from Saltcoats. 



„ villosiuscula {Anatina villosiuscula). Much more fre- 

 quent than the last. It is mentioned by Mr. Smith as taken at Bute, 

 but altogether omitted by Dr. Landsborough, who may have con- 

 founded it with the last, or taken it for the young of the following. I 

 have dredged it off Largs, to the west of Cumbrae, and fine and fre- 

 quent in Lamlash Bay. 



„ pubescens {Amphidesma pubescens, Anatina pubescens). 

 I have never met with this shell in the district : it is mentioned by 

 Mr. Smith and Dr. Landsborough, but this is not a part of Great 

 Britain in which we should have expected to meet with the species. 

 May not villosiuscula have been mistaken for the young of this spe- 

 cies, and hence its insertion in the catalogues referred to ? 



„ convexa {Amphidesma convexa). Ayr, Smith. "Single 

 valves have been found at Arran (Al der)," F. 8$ H. 



„ distorta. I took two full-grown and many young speci- 

 mens of this Thracia from the roots of Corallina officinalis, growing 

 in rock-pools at Clachland Point, Arran. 



Cochlodesma praetenue {Anatina pr<etenuis, Mya pratenuis). A 

 somewhat local species, though found in many spots : I have taken it 

 in Lamlash Bay and to the south-west of Cumbrae, though very 

 sparingly : it is more frequent, however, off Largs. Ayr, Bute, 

 Smith. 



Fam. VII. Solenida. 



Solen marginatus {Solen vagina). " It is enumerated by Mr. Smith 

 among the shells of the Clyde ; but, if a Scottish shell, is certainly a 

 very rare and local species," F. fy H. I wrote to ask Mr. Smith 

 whether he could give me any further particulars respecting this and 

 some other species, and whether he could tell me the exact locality 

 where it occurred, and if it appeared to be firmly established in its 

 habitat ; but, unfortunately, Mr. Smith's dredging-book having been 



