BRANCH ARTHROPODS: CRUSTACEANS 



149 



neath, convex above; note the forked stylets at tip of abdomen ; also 

 the two pairs of antennae, the single median eye, the mandibles, two 

 pairs of maxillae, and five pairs of legs (last pair very small). There 

 are no gills. Some of the specimens, females, may have attached to 

 the first abdominal segment on either side an egg sac. Make 

 drawings showing all these structural details. Watch the Cyclops 

 capturing and feeding on Paramcecium or other small animals. 



The water-fleas (Cyclops) (fig. 35) are among the 

 \smallest of the Crustacea. They are extremely abundant, 



7 



FIG. 35. A water- flea, Cyclops sp. Female with egg-masses. 

 (From living specimen.; 



having great power of multiplication. "An old Cyclops 

 may produce forty or fifty eggs at once, and may give 

 birth to eight or ten broods of children living five to six 



