Fig. 



1. 



Fig. 



2. 



Fig. 



3. 



Fig. 



4. 



Fig. 



5. 



Fig. 



6. 



Fig. 



7. 



Fig. 



8. 



Fig. 



9. 



Fig. 



10. 



Fig. 



ii; 



Fig. 



12. 



Fig. 



13. 



Fig. 



14. 



Fi-. 



15. 



PLATE B. 



Ceriodaphnia rotunda, male (after Kurz). 



C. alabamensis, female. 



C. reticulata, post-abdomen of male with opening of va^ 



deferens (after Weismann). 



C consors ? ? 



C. scitula^ head of female. 



do., post-abdomen. 



do., antennule of male. 



do., semen cell of male. 



Scapholeheris angidata, adult femal*^; 9a. first foot. 



Schapholeheris armata^ " 



do., view from below. 



Lyncodaphnia macrothroides, young. 



do., labrum. 



do., antennule. 



do., last foot, purple pigment in lower part. 



