PLATE T. 



Fig. 1. 

 Fig. 2. 

 Fig. 3. 

 Fi<y. 4 

 l^ig. 5. 



6. 



7. 



8. 



9. 



Fig. 

 Fig. 



Fig. 

 Fis. 



Fig. 10. 

 Fig. 11. 

 Fig. 12. 

 Fig. 13. 

 Fig. 14. 

 Fis. 15. 



Canthocamptus minnesotensis, first foot. 



'• stylets. 



antenna of female, 

 fifth foot of female, 



" '' '' male, 

 antenna of male. 



Daphnia galeata, young. 



" " male. 



Camptocercus leitcocej^halus^ male. 

 Alonella excisa^ male. 

 Cyciops insignis, first foot, outer ramus. 



fifth foot, 



fourth foot, 



stylet. 

 Worm parasitic in arterial sinus of Daphnia schmfferL 



1,1 



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



