Walker Prizes in Natural History. 
The Boston Society of Natural History, 
offers a first prize of from $60 to $100 and a second — 
prize of a sum not exceeding $50, for the best memoirs, 
in English, on the following subject : E 
Contributions to Our Knowledge of the Life- 
-history of Any Plant or Animal. 
Each memoir must be accompanied by a sealed 
envelope enclosing the author’s name and superscribed 
_ by a motto corresponding to one borne by the manu- 
E script, and must be handed to the Secretary, on OF ul 
before April Ist, 1893. | 
Prizes will not be awarded unless the memoirs — 
are deemed of adequate merit. | 
For further particulars apply to 
SAMUEL HENSHAW, 
to n, July 26, 1892. Secretary. . 
