26 HISTORY OF THE OYSTER. 



Ostrea orientalis. East Indies. 



rosacea. China ; Senegal. 



Chemnitzii. China. 



columbiensis. West Columbia. 



lacerans. Senegal. 



bicolor. Senegal. 



miiltistriata. On ships' bottoms, from Afi'ica. 



callichroa. China. 



glaucina. Hab. unknown, 



sinensis. China. 



turbinata. Indian Ocean. 



crista galli. Indian Ocean. 



• hyotis. Indian Seas. 



radiata. Indian Ocean. 



megadon. Peru. 



pes tigris. Java. 



Lincolnii. Australia. 



pyxidata. Philippines, 



Mr. Woodward, in his ' Manual of Mollusca,' gives 

 the number of recent species as 60, and of fossil as 

 200, and mentions the following subgenera : Gry- 

 plicBa, Lamarck; Exoc/yra, Sowerby. Some of the 

 species are said to be poisonous. The Rock Oyster, 

 Anomia, is not bad eating. I was particularly struck 

 with the size of those I found in Glengariff Bay, on 

 the west of Ireland. 



I believe that Delle Chiaje is right, when he says 

 that the Mussel and Oyster are poisonous in summer ; 

 and probably this is the case more or less with all 

 shell-fish that have spawned, or are just about to 

 spawn, and that those which, when out of season, are 



