PLATE T. 



Fig. 



1. 



Fig. 



2. 



Fig. 



3. 



Fig. 



4. 



tig. 



5. 



Fig. 



6. 



Fig. 



7. 



Fig. 



8. 



Fig. 



9. 



Fig. 



10. 



Fig. 



11. 



Fig. 



12. 



Fig. 



13. 



Fig. 



14. 



Fis. 



15. 



Canthocamptus minnesofensis, first foot. 

 " stylets. 



" antenna of female. 



" fifth foot of female. 



" " '' '' male. 



" antenna of male. 



Daphnia galeafa, young. 



" male. 

 Camptocercus leucoceplialus^ male. 

 AlonelJa exdsa, male. 

 Cyclops iiisignis, first foot, outer ramus, 

 fifth foot, 

 fourth foot, 

 stylet. 

 Worm parasitic in arterial sinus of Daphnia schcefferi. 



Note. On pages 43 and 44, for ' Plate T." read Plate J. 



