34 MULTIVALVES. — PHOLAS. 



bitations for the Pholades ; even the stoutest oak planks of 

 sliips' sides are pierced by them with the greatest facility. 

 As they advance in growth, they enlarge their habitation 

 within, leaving the small aperture, by which they originally 

 entered, of its primitive dimensions, thereby precluding all 

 possibility of a retreat. 



The animal possesses the property of emitting a phos- 

 phorescent liquor, which shines with brilliancy in the dark, 

 and illuminates whatever it touches. 



The American, Indian, and European seas supply the 

 few species that are known. 



PHOLAS — Stone-piercer. 



*Dactylus Prickly-piercer. Cordata — Heart-shaped. 



Costata — Ribbed, Chiloensis — Chili. 



Striata — Striated. Hians — Gaping. 



*Candida— J^/2iif<?. *Vax\2i— Small 



*Crispata — Curled. Falcata — Hooked. 



Orientalis — Indian. *Papyracea — Paper. 



