26 HISTORY OF THE OYSTER. 



Ostrea orientalis. East Indies. 



rosacea. China ; Senegal. 



Chemnitzii. China. 



columbiensis. West Columbia. 



lacerans. Senegal. 



bicolor. Senegal. 



multistriata. On ships' bottoms, from Africa. 



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- 

 ph&a, Lamarck; Exogyra, 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 



