iss 



FIRST LESSONS IN ZOOLOGY 



The water-fleas (C\'clops) (fig. ii6) are amon^ the 

 smallest of the crustaceans. The)- are common in 

 ponds and slow streams; and some should be kept in 

 glasses of water in the schoolroom. Though only about 

 I mm. (1/25 in.) long, they are readily seen with the 

 unaided eye. They are white, rather elongate, and have 



Fig. 115. — A wator-flca, fV-Zc/ 

 " n ;;■(.•. 1; fr 



(Mui- 



a rapid, jerk}' movement 

 watch-glass. Note the 



l'..\aminc live specnnens m a 

 ^plit-pear " shajie, the body 

 being broadest near the fiunt, tapering posteriori}', flat 

 beneath, and convex ali(i\e. Note the forked processes 

 at the tip of the abdomen; also the two pairs of antennaj, 



