27 
REPORT ON THE CRUSTACEA. 
By Water Faxon. 
THE principal additions to this collection during the past year 
have come through a system of exchanges carried on in connec- 
tion with a revision of the Astacide, prepared by the Assistant. 
Almost every described species of Astacid of the Northern 
hemisphere is now represented in the Museum collection. 
A collection of Mediterranean Sea Crustacea has been pur- 
chased from the Zodlogical Station at Naples. 
