PLATE Q. 



g. 2. '' " reticulations. 



g. 3. " " post-abdomen. 



g. 4. Alona modesta^ male. 



g. 5. Diaptomus similis, female. 5a. jaw. 



g. 6, " " fifth foot of male. 



g. 7. " '' " " "female. 



g. 8. "" minnetonka^ fifth foot of male. 



g. 9. '' " " " "female. 



g. 10. " " abdomen of female. 



g. 11. " stagnalis, margin of last thoracic segment. 



g. 12. " sanguineus, " " " " " 



g. 13. " stagnalis, fifth foot of the male. 



g. 14. Epischura fluviatilis, abdomen of male. 



g. 15. " lacustris, fifth feet of male. 



g. 16. '• fluviatilis, " " " " 



g. IT. Diaptomus pallidus " " " " inner ramus. 



g. 18. " sicilis " " " " 



