Cyclops. 217 



1891. C. phaleratus, Brady (36), p. 25, pi. IX, fig. 2. 



1891. " " Richard (39), p. 238, pi. VI, fig. 12. 



1892. " " Schmeil (41), p. 170, pi. VIII, figs. 1-2. 



The European G. phaleratus has ten- jointed antennae. Our 

 specimens ordinarily have eleven joints, although sometimes, 

 according to Herrick, occurring with ten. In other respects, 

 my specimens agree with those figured by European authors 

 even in minute details, and there seems no good reason for 

 making a new species of our form. 



It occurs quite widely distributed in the smaller lakes, and in 

 stagnant pools. 



Cyclops bicolor Sars. 



1863. C. bicolor Sars (11), p. 253. 



1880. " diaphanus Rehberg (19), p. 547. 



1884. " " Herrick (26), p. 160, pi. R, fig. 12. 



1885. " " Daday (27), p. 246. 



1887. " " Herrick (30), p. 16, pL VII, figs. 3a-e. 



1891. " bicolor Schmeil (37), p. 34. 



1891. " diaphanus Richard (39), p. 236, pi. VI, fig. 26. 



1892. " bicolor Schmeil (41), p. 118, pi. VI, figs. 6-13. 



The antennae are 11-jointed, hardly as long as the first cephal- 

 othoracic segment. The abdomen is somewhat elongated, the 

 last segment armed with spines posteriorly. The furca is nearly 

 as long as the last two abdominal segments. The lateral spine 

 is situated at about the posterior third. The first and fourth 

 terminal setae are short, the inner considerably longer than the 

 outer. The median setae are strongly plumose, and the longer 

 is about as long as the abdomen. 



The rami of the swimming feet are two-jointed. The arma- 

 ture of the terminal joints is as follows : 



FIRST FOOT. 



Outer br. ex. 3 spines. Inner br. ex. 1 seta. 



ap. 2 setae. ap. 1 seta, 1 large 



spine. 



in. 3 setae. in. 3 setae. 



