dlemoirs of the Museum of Comparative Zodloqn 
AT HARVARD COLLEGE. 
iWon. xe Nos 42 
Q Rathbun. 
REVISION OF THE ASTACIDA. 
By WALTER FAXON. 
Part I. THE GENERA CAMBARUS AND ASTACUS. 
WITH TEN PLATES. 
CAMBRIDGE: 
Printed for the fMluseum. 
Aveust, 1885. 
