770 

 6o (57) 



FRESH-WATER BIOLOGY 



Second segment of right exopodite of fifth foot of male does not 

 have oblique ridge on posterior surface 6i 



6i (62) Lateral spine of terminal segment of right exopodite of male fifth 

 foot terminal, endopodites distinctly two-segmented. 



Diaptomus bakeri Marsh 1907. 



In the female fifth foot the exopodites are 

 distinctly three-segmented, the endopodites 

 distinctly two-segmented. Found in Cali- 

 fornia. 



Length of female, 1.27 mm. 



Length of male, 1.124 mm. 



Fig, 1203. Diaptomus bakeri. 

 X no. B, fifth foot of female. 



A, fifth feet of male. 

 X 193. (Original.) 



62 (61) Lateral spine of terminal segment of right exopodite of male fifth 

 foot situated on distal third of segment, right endopodite 

 indistinctly two-segmented, left one-segmented. 



Diaptomus washingtonensis Marsh 1907. 



The first abdominal 

 segment of the female 

 has a digitiform process 

 on the right posterior 

 border. Found in 

 Washington. 



Length of female, 



1. 187 mm. 



Length of male, 



1. 137 mm. 



Fig. 1204. Diaptomus washingtonensis. yl , fifth feet of male. X 126. 

 B, abdomen of female. X no. (Onginal.) 



