66 



POPULAR CONCHOLOGY. 



as the Solen. Ligament thick and external. 

 Pallial impression very deeply sinuous. Animal 

 larger than its shell; foot large and thick. — 

 4 species recent, and 2 fossil. 



Found in the Mediterranean and Atlantic 

 Ocean. 



15. Pholadomia (Sowerby). — Shell thin, 

 transparent, white or 

 yellowish, the inside / 



pearly, transverse and \V \J>" ^S^///// IWi 

 oval, inequilateral, and 

 gaping at both ends ; hinge having a long narrow 

 hollow or pit ; ligament external ; bosses worn 

 by being placed near each other. Animal un- 

 known. — 1 species recent, and 3 fossil. 



There is only one species that is known to 

 be in existence at present, the Pholadomia 

 Candida, which is found after hurricanes at the 

 island of Tortola ; but there are fossil species. 

 The recent species is supposed to be a native of 

 deep seas. 



16. PANOPiEA. — 

 — Shell equivalve, 

 transverse, broader 

 and shorter than the 



