50 Russell's Familiar Notice of some of the 



PHOLAS. Greek, a burroiv, (in allusion to Us habits.) 



CRISPATA. Latin, crisped or curled. 

 The curled shelled Pholas or Piddock. 



A fine delicate shell, with a singular spoon-shaped tooth, 

 beneath the beak of the shell and within ; furnished with smaller 

 pieces or valves, varying with the particular species. 



Rare on the beaches of Essex Co., and found generally in 

 fragments, or single valves. 



Brown's Zool. Text Book, pi. 92, fig. 17. Blainville's 

 Manuel pi. 79, fig. 7. 



Brown's Conchol. Text Book, pi. 19, fig. 17. 



PHOLAS LAMELLATA. Turton. Small plaited Piddock. 



This species, of which some doubt is entertained of its identity 

 with the British specimens as figured by Turton, was found at 

 Phillips' beach, Lynn, during the past summer. It resembles 

 the young of Pholas crispata, but differs from it in having only- 

 one accessory piece, a medio-dorsal. Bores into the clay and 

 also into decayed wood : its burrow being eight inches long, 

 the shell occupying the middle, and the animal extending above 

 and below, so as to completely occupy the space. Its valves 

 are of great delicacy, and when removed from its burrow, the 

 attempt of the animal to withdraw itself into the shell often rup- 

 tures them. About an inch long, pure white and beautiful. 



Turton's British Bivalves. 



Presented to the Society's Cabinet by Jos. True, to whom I 

 am indebted for the above observations. 



The following are BIVALVES, i. e. having but two shells, and 

 belonging to the Class XI. of Lamark, viz. CONCHIFERA, i. e. 

 having shells, (there being Molluscous animals without shells,) 

 and to his 1st order BIMUSCULOSA, i. e. having two muscular 

 impressions on each valve. The usual habitation of this group 

 of animals is in mud or sand, though sometimes coining out of 

 it, at pleasure. 



