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. — Daphnia, 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. 



a n first antennae ; a 2i second (rowing) antenna; ; ab, abdomen ; an, eye ; lir, branchial 

 sac ; bru, brood cavity ; it, intestine ; /, to /.„ trunk feet ; g, brain ; h, 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 



