Moina rectirostris Mueller. 

 Fig. 



1. Female with summer ova. 



2. Portion of the shell near the postero-inferior angle. 

 '6. Post-abdomen. 



4. Autennule. 



Moina brachiata "Jurine. 



5. Female with summer ova. 



6. Anteunule. The lateral flagellum is omitted. 



7. Post-abdomen, 



8. First foot of female. 



0. Moina paradoxa Weismann. Ordinary form. 



