488 Wisconsin Academy of Sciences, Arts, and Letters. 



EXPLANATION OP PLATE XV. 



Fig. 1. Dlaplonms 07'egonensis: fifth feet of male(X 290). 

 Fig. 2. Diuptomus Reighnrdi: fifth feet of male (X290). 

 Fig. 3. Diaijtomus nilssissipplenfiis: fifth feet of male (X 290). 

 Fig. 4. Dlapiomwi oi^eyonermis: fifth feet of female (X375). 

 Pig. 5. Diaptomus raissis^ippiensis : abdomen of female (X 165). 

 Fig. 6. Diaptomus Be ig hard I.: abdomen of female (X 290). 

 Fig. 7. Diaptomus oregonensis : abdomen of female (X 165). 

 Fig. 8. Diaptomus mississippiensis: fifth feet of female (X 290). 

 Fig. 9. Diaptomus Reighardi: fifth feet of female (X 375). 



