PHOLAS. 83 



STRIATED PIERCER. 

 Pi. 16. /. 1, 2, 3, 4. Sf 8. Mrs. Mawe. 



7. Pholas striata. Ph. testa oblonga, rotundata, multifariam striata. 



Linn. Syst. Nat. ed. 12. p. 1111. Linn. Gmel. p. 3215. 

 Shell oblong, rounded, variously striated. 

 Rumph. Mus. t. 46. f. H. Petiv. Amboin. t. 19. f. 8. Gault. Test. 



t. 105. f. F. Speng. Besch. Berl. Naturf. 4. t. 5. f. 1—5. Phil. 



Trans, vol. 55. pi. 1. f. 1, 2, 3, 4. Chemn. Conch, t. 102. 867—871. 



Envy clop. Method, pi. 170. f. 1, 2, 3. Donov. Brit. Shells, t. 117. 



Mont . Test. Brit. p. 26. Linn. Trans. 8. p. 32. 



This singular species of Pholas is striated in several 

 directions. The striae at the head of the shell, or that 

 part which is not buried in the wood, are very distinct ; 

 and their roughened waved surface, when perfectly 

 clean and magnified, has somewhat the appearance of 

 fine turned ivory. The shield which covers the hinge 

 is nearly heart-shaped, and beneath it is a narrow plate, 

 which connects the valves. They are both seen in 

 fig. 1. Fig. 2. represents a shell in the same position, 

 but without the shield, to show the two milk-white teeth 

 that project from the back of the shell. The sides, 

 which are buried in the wood, are extremely thin, and 

 striated in two directions. In front there are two shields, 

 one on each side of the opening, besides a narrow 

 plate down the middle, like that behind. The bottom 

 is open, and in full-grown shells rather curved. There 

 is a long, slender, curved tooth in each of the principal 

 valves. Fig. 4. is a shell in its natural situation, en- 

 closed in a piece of mahogany, the cavity of which is 

 longer than the shell itself, and therefore could not 

 have been made by any rotatory motion of the testa- 

 ceous valves, as suggested by Reaumur. The spe- 



