Fig. 



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15. 



PLATE F. 



Chydorns glohosus. 



do., first foot. 



do., end of post-abdomen. 



Chydorus sphcericus^ male. 



Chydorus nitidus, post-abdomen of female. 



Chydorus nitidus^ bead. 



Chydorus sphcericus^ ephippial female. 



do., female. 



Chydorus glohosus, post-abdomen of male. 



Chydorus sphcericus^ from above. 



Chydorus ovalis. 



Chydorus cwlatiis. 



Crepidocercus setiger. 



Alona affinis. 



Pleuroxus unidens; 15a. antenna. 



