PLATE T. 



Fig. 1. 

 Fig. 2. 

 Fig. 3. 

 Fig. 4. 

 lig. 5. 

 Fig. 6. 

 Fig. 7. 

 Fig. 8. 

 Fig. 9. 

 Fig. 10. 

 Fig. 11. 

 Fig. 12. 

 Fig. 13. 

 Fig. 14. 

 Fia. 15. 



Canthocanqjfus minnesotensis, first foot. 



stylets. 



Ik 



antenna of female, 

 fifth foot of female. 



'' '' male, 

 antenna of male. 



Daphnia galeaia^ young. 



" " male. 



Camptocercus leucocephalus, male, 

 AloneUa exc'sa, male. 

 Cyctops insignis, first foot, outer ramus. 



fifth foot, 



fourth foot. 



stylet. 

 Worm parasitic in arterial sinus of Daphnia schcefferL 





I.' 



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



