492 Wisconsin Academy of Sciences, Arts, and Letters. 



EXPLANATION OF PLATE XVII. 



Fig. 1. Diaptomus sicilis: fifth feet of male (X 290). 



Fig. 2. Diaptomus tenuicaudatus : fifth feet of female (X 290). 



Fig. 3. Diaptomus tenuicandatus : terminal segments of right antenna 



of male (X 290). 

 Fig. 4. Diaptomus sicilis: terminal segments of right antenna of male 



(X 290). 

 Pig. 5. Diaptomus sicilis; fifth foot of female (X 290). 

 Fig. 6. Diaptom,us Ashlandi: fifth foot of female (X 375). 

 Pig. 7. Diaptomus m,inutus: fifth foot of female (X 375). 

 Fig. 8. Diaptomus Ashlandi: fifth feet of male (X 290). 

 Fig. 9. Diaptomus sicilis: abdomen of female (X 165), 

 Pig. 10. Diaptomus jishlo.ndi: terminal segments of right antenna of 



male (X 290). 

 Pig, 11. Diaptom,us minutus: terminal segments of right antenna of 



male (X 290). 



