Mr STARK on Two Species of Photos, Sfc. 439 



with a pick-axe, break the rocks inhabited by them, for the pur- 

 pose of sending them to market, or as bait for fish. They are 

 found in every sea where the rocks are suitable for their burrow- 

 ing, and are met with fossil in many countries of Europe *. 



* Bosc. in Nouv. Diet. cPHist. Nat. Vol.xxv. p. 539. M. G. P. DESHAYES has 

 recently described and figured four species of fossil Pholades, found by him, among 

 other perforating bivalves, at the village of Valmondois in France. Mem. de la 

 Soe. PHist. Nat. torn. i. p. 245. 



VOL. X. P. II. 3 K 



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