Cyclops. 213 



Cyclops modestus Herrick. 

 Plate V, figs. 10-13. 



1883. C. modestus Herrick (25), p. 500. 



1884. « « » (26), p. 154, pi. R, figs. 1-5. 

 1887. " " " (30), p. 14. 



I have found C. modestus in only one locality, — Rush Lake. 

 Herrick found it in Alabama and Minnesota. It appears to be 

 a clearly marked species. The color in all my specimens was 

 distinctly purplish, a color entirely different from that of the 

 other entomostraca in the same collections. In all my speci- 

 mens the antennae were 16- jointed, and about as long as the 

 first segment of the cephalothorax. The cephalothorax is oval 

 and very broad as compared with the abdomen. The abdomen is 

 slender. The furca is about as long as the last two abdominal 

 segments, with the lateral spine situated about midway of its 

 length. The external margin of the furca is hollowed out below 

 the lateral spine. Of the terminal setae, the first is small and 

 spine like, the second about four-fifths the length of the third, 

 and the fourth slightly shorter than the second. 



The armature of the terminal joints of the swimming feet is 

 as follows : 



FIRST FOOT. 



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



ap. 1 spine, 1 seta. ap. 2 spines, 1 minute 



seta. 



in. 3 setae. in. 2 setae. 



SECOND FOOT. 



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



ap. 1 spine, 1 seta. ap. 2 spines. 



in. 4 setae. in. 1 spine, 2 setae. 



THIRD FOOT. 



Outer br. ex. 2 spines. Inner br. ex. 1 seta. 



ap. I spine, 1 seta. ap. 2 spines, 



in. 4 setae. in. 1 spine-like seta, 



2 setae. 



