500 Wisconsin Academy of Sciences^ Arts, and Letters. 



EXPLANATION OP PLATE XXI. 



Fig. 1. Diaptomus clavipes: abdomen of female (X 190)- 



Pig. 2. Diajitomus conipedatus : fifth feet of male (X 3.90). 



Fig. 3. Diaptomus conipedatus; terminal segments of right antenna 



of male (X 290). 

 Fig. 4. Diaptomus conipedatus: &iih foot of female (y:i2Q0). 

 Fig. 5. Diaptomus clavijies: fifth feet of male (X H^)- 

 Fig. 6. Diaptomus clavipes: terminal segments of right antenna of 



male (X 190). 

 Fig. 7. Diaptomus lej^topusvSiT. piscinte: terminal segments of right 



antenna of male (X 165). 

 Fig. 8. Diaptomus s«flfwicawc?a; terminal segments of right antenna of 



male (X 290). 

 Fig. 9. Diaptomus nudus : fifth foot of female (X 267). 

 Pig. 10. Diaptomus signicauda: fifth foot of female (X 165). 

 Fig. 11. Diaptomus signicauda: abdomen of female (X 165). 



