PLATE XXII. 



It is not uncommon on many of the British coasts *. Adanson 

 has a variety of it (/3) from Senegal ; and other authors mention the 

 same species as a native of the East Indian and African seas. 



* This species is not uncommon on many of our coasts, and in great plenty on some, 

 as at the Stilly Islands ; at Liverpool, where they are called Cockspurs ; at Scarborough, 

 after winter storms, according to Lister ; at Exmouth, and other places on the western 

 shores; and I have received very fine and perfect ones from the coasts of Wales, as 

 Flintshire, Pivlhely in Carnarvonshire, and Barmouth in Merionethshire. It is also a Shell of 

 the Orkneys. Da Costa. 



