DAPHNIA 



in 



just behind the last leg of a crayfish at rest in a dish 

 of water, a series of puffs of the colouring matter will 



FIG. 24. Daphnicty an abundant freshwater Crustacean ; the body is 

 enclosed in a carapace ; the limbs, less numerous than those of the Brine- 

 shrimp, carry gills. (From Lang's ' Comparative Anatomy '.') x 50. 



first antennae ; a?, second (rowing) antennae ; at>, abdomen ; au, eye ; br, branchial 

 sac ; bru, brood cavity ; d, intestine ;/j to f s , trunk feet ; g, brain ; ft, heart ; /, liver ; 

 sd, shell gland. 



issue in a few moments from beneath the eyes of the 

 creature ; and if we seize it and examine the under 



