PLATE F. 



] . Chyclorus globosus. 



ig. 2. do., first foot. 



■. 3. do., eud of post-abdomen. 



;. 4. Chydorus sphcericus, male. 



:. 5. Chydorus nitidus, post-abdomen of female. 



:. 6. Chydorus nitidus^ head. 



;. 7. Chydorus sphcericus, ephippial female. 



;. 8. do., female. 



. 9. Chydorus globosus, post-abdomen of male. 



•. JO. Chydorus sphxericus^ from above. 



;. 11. Chydorus oralis. 



: 12. Chydorus ccdafus. 



g. 13. Crepidocercus setiger. 



g. 14. Alona affinis. 



15. PJeuroxus unidens; 15a. antenna. 



