84 



CLASS CONCHIFERA. 



a pearl, and of these pearls not above one in a hundred 

 be tolerably clear, yet a vast number of fair merchant- 

 able pearls, and too good for the apothecary, are offered 

 for sale by those people every Summer assizes. Some 

 gentlemen of the country make good advantage thereof, 

 and myself, whilst there, saw one pearl bought for 50/. 



Isocardia cor. Anodonta Ciigncra. 



that weighed thirty-six carats, and was valued at 40Z. A 

 miller took out a pearl, which he sold for 4/. 105. to a 

 man that sold it for 10/., who sold it to the late Lady 

 Glenanly for 30/., with whom 1 saw it in a necklace ; 

 she refused SO/, for it from the late Dutchess of 

 Ormond." 



The Heart-Shaped Isocardia, 

 (Isocardia cor). 



This shell, which is very common in the Mediterranean, 

 where it goes by the name of the foolscap-shell, and the 

 bullock^s heart shell, is rare in the British seas, but it 

 is sometimes found on the Irish coast ; it is the lart^^est 

 British bivalve shell. 



