PLATE L. 



>Fig. 1. 



Daphnia minnehaha, young female. 



Fig. 2. 



" " head of female; 2a. post-abdomen 



Fig. 3. 



" hyalina^ young female. 



Fig. 4. 



" " young. 



Fig. 5. 



" " post-imago. 



Fig. 7. 



" dubia, young. 



Fig. 8. 



" " older female. 



