SMITHSONIAN CONTRIBUTIONS TO KNOWLEDGE 

 PART OF VOLUME XXXV 



THE YOUNG OF THE CRAYFISHES 

 ASTACUS AND CAMBARUS 



BY 



E. A. ANDREWS 



-.a 



K-°1 





(No. 1718) 



CITY OF AV-\,SHINGTOX 



PUBLISHED BY THE SMITHSOXIAX IXSTITUTIOX 



1907 



