COPEPODA 



765 



41 (40) Lateral spine of second segment of right exopodite of male fifth 

 foot long, right endopodite equals in length first segment 

 of exopodite Diaptomus ashlandi Marsh 1893. 



Found in the Great Lakes and some 

 lakes immediately connected with them 

 and west to the State of Washington. 



Length of female, 0.97 mm. 



Length of male, 0.89 mm. 



FIG. 1193. Diaptomus ashlandi, male. A, fifth 

 feet. X 145. B, terminal segments of right 

 antenna. X 145- (Original.) 



42 (23, 26) Antepenultimate segment of right antenna of male bears curved 



process 43 



43 (46) Process equals or exceeds in length penultimate segment. . . 44 



44 (45) Process about equals in length last two segments, second basal 



segment of right fifth foot of male dilated on inner margin, 

 endopodites of fifth feet in both sexes indistinctly two- 

 segmented. . . ... . Diaptomus eiseni Lilljeborg 1889. 



Has been found only in California 

 and Nebraska. ', 



Length of female, 4 mm. 

 Length of male, 3.5 mm. 



FIG. 1194. Diatoto-nus eiseni, male. A, fifth feet. 

 X 38. B, terminal segments of right antenna. 

 X 133- (Original.) 



