P1.ATE K. 



Fig. 

 Fig. 

 Fig. 

 Fig. 

 Fig. 



1. 

 2. 

 3. 

 4. 

 5. 



Fig. 6. 



Fig. 7. 



Fig. 8. 



Fig. 9. 



Fig. 10. 

 Fig. 11. 

 Fig. 12. 



Daphnia niinnehaha, male. 



" " part of feet of first and second pair. 



Canthocamptus hibernicus, antenna of female. 



'^ fifth foot of female. 



palustris, antenna of male. 

 frispinosus, fifth foot of female. 

 ■minutus, young. 



" nauplius form. 

 Pseudo-sida hidentata, adult female, antennule, labrum, 

 augleof shell and post-abdomen. 

 Daphnia rosea^ young female. 

 '' " post-imago. 



'^ beak. 



