At the suggestion of the Director the subjoined alphabetical indices have been 
prepared to show students in which volume they may find memoirs in which they 
are particularly interested. Owing to the fact that the memoirs were submitted to 
the Editor at very various times, and as it was important to publish them as soon 
as possible after their reception, the fifty memoirs in the five volumes of “ Zoology 
and Botany” necessarily deal with subjects not closely allied in any systematic 
arrangement. 
Hed. B. 
February 16th, 1912. 
