204 CO^CHYLW— J} J TMYK A. 11. 



31us. nost. Of foreign importation upon tlie bottoms of vessels, 

 from wliicli our specimens were taken, with some small living 

 young ones attached. 



Shell about two inches in diameter, greyish white or purplish, 

 rough with foliations; the under valve shooting at the base into 

 irregular claw-like ramifications round the margin, by wliich it 

 fixes itself to any hard substance : the sharp triangular plaits at 

 the margin close alternately within each other, like the dovetail 

 of joiners' work: inside honey yellow, with the inner margin 

 finely tubercled. 



eduiis. QsTREA testd ovato-rotundotd foliaceo-sqnamosd, vaJod stipe- 



riore tninore planatd, margine interno integerrimo. 

 Shell roundish oval, with scaly foliations, the upper valve less 



and flattened, and the inner margin very entire. 



Ostrea eduiis. hinn. Syst. Nat. p. 1148. 



Gmelin, Syst. p. 3334. 



Turfotiy Linn. Syst, iv. p. 274. 



Pennant, iv. p. 225^ tab. 65, fig. 2, 



Montagu, Test. Brit. p. 151. 



Itinn. Trans, viii. p. 101. 



Turton, British Fauna, p. 162. 



Dorset Calal. p. 38,. tab. 11, fig. 6. 



Dillwyn, Descript. Catal. p. 280. 



Turton, Conch. Diet, p 133. 



Chemnitz, viii. p. 48, tab. 74, fig. 682. 

 Ostreum vulgare. Da Costa, p. 154, tab. H, fig. 6. 

 Ostrea major. Lister, Conch, tab, 193, fig. 194. 



Mus. nost. Common, on rocks and in vast beds. 



