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2)(p0 into 111? aquarium. 



By the Rev. William Spiers, M.A., F.G.S., F.R.M.S. 



Part II. 



HERE is an object which for some time has invited our 

 attention. It seems to be a very frisky and restless crea- 

 ture. Its antics are as fantastic as those of the flea (see 

 Figs. 3, 4). It is not a flea, however, as can soon be seen by looking 



Fig. 3. — Daphnia pidex. Male, magnified, 

 at both objects under the lens. The flea is an insect in the 

 scientific sense, and has rudimentary wings. It breathes the air 

 like other insects properly so called. But if you closely observe 

 this frolicsome denizen of the water, you will see that it is wholly 



Fig. 4. — Daphnia pulex. Female, natural size and magnified. 



different in every respect from the obnoxious Pulex irritans. It is, 

 however, called a water-flea. Of these there are many different 

 kinds. The one we are looking at is the familiar Daphnia. It 



