Distribution, Food and reproductive Capacity of some fresh-water Amphipods. 29 



7 prs. ave., 



106tl' day and 4 times thereafter 



Number of progeny in first generation 



do second do 



do third do 



do fourth do 



385 



30 

 308 

 210 

 126 



42 



1216 



462 



90 



30 

 385 



30 

 308 

 210 

 126 



42 



1034 



385 



30 

 308 

 210 

 126 



42 

 864 

 264 

 180 

 108 



86 

 756 

 180 

 108 



36 

 594 



90 



30 

 495 



30 

 396 

 270 

 162 



54 



Grand total 13,976 



