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 tho 

 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 Scilly Islands ; at Li-verpool, 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 

 Flintihirc, Pivlkc'y in Carnar-vonshin; and Bannoutb in Merionethshire. It is also a Shell of 

 the Orkneys. Da Costa. 



H 3 



