Mollusks. 5713 



Psammobia costulata. Ayr, Smith. 

 *Tellina crassa. Ayr, Smith ; Lamlash Bay, Lands. I have 

 dredged it in the laminarian zone, Shell Bay, Cnmbrae. 



„ donacina. This beautiful shell, which seems to have its 



head quarters in the west of Scotland, is found frequently in such 

 parts of the Clyde as are suitable for it, in twelve to fifteen fathoms 

 water, among nullipore and comminuted shells. 



„ incarnata (Tellina depressa, Tellina squalida). Although 



I have taken many single as well as two or three double valves of this 

 shell between the Cumbraes and in Lamlash Bay, they have all been 

 evidently so long dead as to lead me to regard them rather as post- 

 tertiary fossils than as recent shells, although they may have been 

 the latter. Mr. Smith, however, mentions it as found at Ayr and 

 Bute; and Dr. Landsborough has met with it in Lamlash Bay, in 

 which last locality it has also been taken by Mr. Alder. 



* „ tenuis. Is very common in the sandy bays, mostly white, 

 occasionally pale pink or yellowish, but I have never met with crim- 

 son specimens in the Clyde. 



„ fabula. Local in its distribution : Karnes Bay, C umbrae, 



is a prolific source ; it is found there in some numbers among the fine 

 sand, with which the dredge comes up filled. 

 „ solidula. Lamlash Bay, Lands. 



Syndosmya alba (Amphidesma Boysii, Amphidesma album). 

 Arran, Bute, &c, Smith ; Lamlash, Lands. I have likewise taken 

 it off Cumbrae. 



* „ prismatica (Amphidesma prismatica). Dr. Lands- 

 borough records this among the Lamlash Bay Mollusca. 



3 , tenuis (Amphidesma tenue). Introduced into Mr. Smith's 



catalogue without any locality affixed : as his list embraces the arm 

 of the sea right away to the coast of Ireland, it may find its place in 

 the list from having been found on the latter coast ; I have, however, 

 taken it in Lamlash Bay : it appears scarce. 



Scrobicularia piperata (Lutraria compressa, Amphidesma com- 

 pressa). Bute ; Ayr, Smith. It is recorded by Dr. Landsborough as 

 found at Arran. 



Alfred Merle Norman. 

 Kibworth, Leicestershire, 

 May 28th, 1857. 



(To be continued). 



XV. 3 B 



