504 Wisconsin Academy of Sciences, Arts, and Letters, 



EXPLANATION OF PLATE XXIII, 



Pig. 1. Diaptomus Judayt: abdomen of female (X 165). 



Fig. 2. Diaptomus waahingtonensis : abdomen of female (X 165). 



Fig. 3. Diaptomus signicauda: abdomen of female (X 165). 



Fig. 4. Diaptom,us saltillinus: ieTxmmX segments of right antenna of 



male (X 290). 

 Fig. 5. Diaptom.us Judayi: fifth foot of female (X290). 

 Fig. 6. Diaptotnus saltillinus: fifth feet of male (X 190)- 

 Fig. 7. Diaptomus saltillinus : fifth foot of female (X 290). 

 Pig. 8. Diaptomus dorsalis: fifth foot of male (X 290). 

 Fig. 9. Diaptomus dorsalis : profile of last cephalothoracic segment of 



female (X 165). 

 Pig. 10. Diaptomus saltillinus: dorsal process of last cephalothoracic 



segment of female (X 290). 



