494 Wisconsin Academy of Sciences, Arts, and Letters . 
EXPLANATION OF PLATE XVIII. 
Fig. 1. Diaptomus minutus: abdomen of female (X 165). 
Fig. 2. Diaptomus shoshone: fifth feet of male (X 108). 
Fig. 3. Diaptomus shoshone: abdomen of female (X 68). 
Fig. 4. Diaptomus shoshone: terminal segments of right antenna of 
male (X 180). 
Fig. 5. Diaptomus shoshone: fifth foot of female (X 108). 
Fig. 6. Diaptomus Birgei: abdomen of female (X 165). 
Fig. 7. Diaptomus minutus: fifth feet of male (X 290). 
Fig. 8. Diaptomus Birgei: terminal segments of male antenna (X 290). 
Fig. 9. Diaptomus siciloides: fifth foot of female (X 290). 
