27 



REPORT ON THE CRUSTACEA. 



By Walter 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 Astacidse, 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 Zoological Station at Naples. 



