i63 



BRANCHIOPODS. 



antennae are often curiously branched, and appear to be used as 

 oars. It is a remarkable character of all these pretty little " water- 

 fleas " that they seem to have but a single eye, which is generally 

 of a bright crimson hue, sparkling like a little ruby, and set in the 

 front of the head. 



FIG. 170. WATER-FLEAS: i. Cyclops communis ; 2. Cypris nnifasciata ; 3. Daphnia pule*. 



Some of these Entomostraca* as they are called (that is, in- 

 sects with shells), inhabit the sea, and may be met with in abun- 

 dance in clear pools worn in the rocks, sporting about amongst 



FIG. 171. MARINE ENTOMOSTRACA (Cythere albo-macnlata and Cyclops chelifer\ 



the confervas and corallines that often so fancifully fringe their 

 edges and decorate their sides, forming a miniature sub-aqueous 

 forest, for myriads of living creatures to disport themselves in. 

 Two examples of these marine forms are represented in the ac- 

 companying figure (Fig. 171). 



* ^.TO/JOS, entomos, an insect ; SarpaKov, ostrakon, a shell i.e. , insects with shells. 



