500 Wisconsin Academy of Sciences t Arts, and Letters . 
EXPLANATION OF PLATE XXI. 
Fig. 1. Diaptomus clavipes: abdomen of female (X 190). 
Fig. 2. Diaptomus conipedatus: fifth feet of male (X 190). 
Fig. 3. Diaptomus conipedatus; terminal segments of right antenna 
of male (X 290). 
Fig. 4. Diaptomus conipedatus: fifth foot of female (X 290). 
Fig. 5. Diaptomus clavipes: fifth feet of male (X 114). 
Fig. 6. Diaptomus clavipes: terminal segments of right antenna of 
male (X 190). 
Fig. 7. Diaptomus leptopu&v&v. piscinae: terminal segments of right 
antenna of male (X 165). 
Fig. 8. Diaptomus signicauda: terminal segments of right antenna of 
male (X 290). 
Fig. 9. Diaptomus nudus: fifth foot of female (X 267). 
Fig. 10. Diaptomus signicauda: fifth foot of female (X 165). 
Fig. 11. Diaptomus signicauda: abdomen of female (X 165). 
