At the suggestion of the Director the subjoined alphabetical indices ha\c been 

 prepared to show students in which volume they iiuiy find memoirs in which thcv 

 are particularly interested. ( )vvin<f to the fuet that the memoirs wen- submitted to 

 the Editor at very various times, and as it was important to publish them a.s soon 

 as possible after their reception, the fifty memoirs in the five volumes of " /oolo^v 

 and Botany" necessarily deal with subjects not closely allied in any systematic 

 arrangement. 



F. J. B. 



Kbnmnj KM/i, l!tlL'. 



