PJLATE K. 



Daphnia minnehaha^ male. 



" " part of feet of first and second pair. 



Canthocamptus hihernicus^ antenna of female. 



fifth foot of female. 

 " palustris^ antenna of male. i 



'' frispinosus^ fifth foot of female. 



" minutus^ young. j 



" " nauplius form. ^ 



Fig. 9. Psendo-sida bidentata, adult female, antennule, labrumi 



angle of shell and post-abdomen. 

 Fig. 10. Daphnia rosea^ young female. 

 Fig. 11. '' '* post-imago. 



Fig. 12. '' '^ beak. 



Fig. 



1. 



Fig. 



2. 



Fig. 



3. 



Fig. 



4, 



Fig. 



5. 



Fig. 



6. 



Fig. 



7 



Fig. 



8. 



