I 



EXPLANATION OF PLATE IL 



Fig. 1. Daphnella exspinosa, fern. Antennule X 140. 

 3. " " male. " " 



3. " " " Post-abdomen X 140. 



A it <' (' i' " 



5. Daplinia leevis, fern. " " 



6 a, a. " " " Embryo, outline of head. 



6 b, b'. " " " Young, " 



6 c. " " " Adult, 



7. " " male. Antennule X 140. 



8. Ceriodaphnia cristata, fem. Head X 130. 



9. " " " Post-abdomen X 130. 



10. Bosmina cornuta, fem. Head, etc., X 150. 



11. Pleuroxus straminius, fem. Post-abdomen X 140. 



12. " insculptus, " Details of marking. 



13. " hamatus, " " " 



14. " " " First foot X 148. 



15. " acutirostris " x 135. 



16. Alon-a angulata, fem. X 135. 



17. " tuberculata, fem. X 135. 



18. " " male. Post-abdomen X 140. 



19. Chydorus sphsericus, male, x 150. 



