60 PECTIXID.E. 



hinge and preventing its being too closely pressed : muscular 

 scars distinct. L. 235. 13. 2-5. 



Var. 1. lineata. Shell white, with a brown line running 

 down the crest of each rib. P. lineatus, Da Costa, Brit. Conch. 

 p. 147, pi. x. f. 8. 



Var. 2, tumida. Shell more swollen and deeper. 



Var. 3. elongata. Shell smaller, and longer than broad. 



Habitat : Common on all sandy coasts, and grega- 

 rious, in 6-90 fathoms. Var. 1. Not unfrequently found 

 with specimens of the usual colour', and sometimes having 

 a mixed hue. Var. 2. Plymouth (J. Cf. J.) ; Exmouth 

 (Clark) ; Cork (Humphreys). Var. 3. Loch Torridon, 

 Ross-shire (J. G. J.); BirtcrbuyBay, co. Galway (Barlee) : 

 rare. This species is a common fossil in the Scotch 

 glacial deposits, and in the Norwich, Red, and Coralline 

 Crag. Steenstrup informs me that he has found it in 

 Iceland; Mohr has recorded it from the Faroe Isles, 

 Weinkauff from Algeria, Forbes from the iEgean, and 

 M c Andrew from Madeira; and it is widely distributed 

 throughout the intervening seas. 



This pretty and well-known species was first described 

 by Lister. Mr. Norman says that quantities are dredged 

 in the Firth of Clyde, where they are called " clams," 

 for bait in the long-line fishery. When cooked they 

 have a rich and agreeable, but peculiar, flavour : they 

 are not much eaten in this country. According to 

 Montagu they are called " frills" or "queens" on the 

 South Devon coast. The fishermen on the Dorset coast 

 call them " squinns." In the north of France this kind 

 bears the name of " vanneau " or " olivette." The 

 shells make pretty pincushion- cases; and in the North- 

 American States another species (P. concent ricus) is 

 used for the same purpose. 



