PLATE G. 



Fig. 1. Alonopsis latissima^ male. 



Fig. 2. Alona glacialis ? female. 



Fig. :^. do., male. 



Fig. 4. Alona tuhercnlata. 



Fig. 5. do., post-abdomen. 



Fig. 6. do., labrum. 



Fig. 7. do , antenna, setose branch. 



Fig. 8. Alona glacialis, antenna. 



Fig. 9. Alonopsis latissinia, feot. 



Figs.lO, 11. Alonella excisa, details of shell sculpture. 



Fig. 12. PleuroxHS denticiUatiis, female; 10a. outline of ephippiura. 



Fig. 13. do., common variety. 



Fiar. 14. Alona tuberculata. var. 



