PLATE I. 



1. Camptocerciis rectirostris, post-abdomen of female. 



2. do. post-abdomen of male. 



3. do. male. 



4. Campfocercus hiaerratus^ head. 



5. Camptocercus latlrostris, head of male. 



6. do., head of female. 



7. Camptocercus lillgeborgii, head. 



8. do., post-abdomen of female. 



g. 9. Acropenis leiwocephalus, post-abdomen of male. 



g. 10. Acrojjerus angustatus, " " 



g. 11. Alona tenuicaudis^ post-abdomen. 



g. 12. Alona dentata^ post-abdomen. 



g. 13. do. female. 



g. 14. Alona elegans. 



g. 15. Alona intermedia. 



g. 16. Pleuroxus ha stains. 



g. 17. Leptorhijnohus falcatus. 



g. 18. Phrixura, rectirostris. 



g. 19. Eurycercus lainellatus, first foot of female. 



g. 20. Alona sanguinea? shell markings. 



g. 21. Monospilus dispar', 21a. do., head seen from in front. 



Figures 19-21 original, others from Kurz, P. E. Mueller and Schoedler. 



