286 



PHASIANID.E. 



volume of the Memoirs of the Wcrnerian Society ; one by 

 John Hunter in the various editions of his Animal CEconomy, 

 and one by myself, published in the Transactions of the 

 Royal Society for the year 1827. I have seen this disor- 

 ganisation and its effects among birds in the Gold, Silver, 

 and Common Pheasants, in the Partridge, the Peafowl, the 

 Common Fowl, the Crowned Pigeon, the Kingfisher, atrd 

 the Common Duck : in the latter species, in two instances, 

 the change went on even to the assumption of the two curled 

 feathers above the tail. Other classes of animals are liable to 

 an influence similar in kind, and the effect is singularly con- 

 spicuous among insects and Crustacea. 



