504 Wisconsin Academy of Sciences, Arts, and Letters. 
EXPLANATION OF PLATE XXIII. 
Fig. 1. Diaptomus Judayi: abdomen of female (X 165). 
Fig. 2. Diaptomus washingtonensis: abdomen of female (X 165). 
Fig. 3. Diaptomus signicauda: abdomen of female (X 165). 
Fig. 4. Diaptomus saltillinus: terminal segments of right antenna of 
male (X 290). 
Fig. 5. Diaptomus Judayi: fifth foot of female (X 290). 
Fig. 6. Diaptomus saltillinus: fifth feet of male (X190). 
Fig. 7. Diaptomus saltillinus: fifth foot of female (X 290). 
Fig. 8. Diaptomus dorsalis: fifth foot of male (X290). 
Fig. 9. Diaptomus dorsalis: profile of last cephalothoracic segment of 
female (X 165). 
Fig. 10. Diaptomus saltillinus: dorsal process of last cephalothoracic 
segment of female (X 290). 
