PLATE G. 



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Alonopsls latissima^ male. 



Alona glacialis ? female. 



do., male. 



Alona tuherculata. 



do., post-abdomen. 



do., labrum. 



do , antenna, setose branch. 



Alona glacialis^ antenna. 



Alonopsis latissima, feot. 

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

 Fig. 12. PleuroxKS clenticulatus^ female; 10a. outline of ephippium. 

 Fig. 13. do., common variety. 

 Fiof. 14. Alona tuherculata. var. 



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