BKANCHIOPODA. 



223 



markable character of all these pretty little '• water- 

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

 which is generally of a bright crimson line, spark- 

 ling like a little ruby, and set in tlie front of the 

 head. 



Fig 170.— m-ateu-fi.F-as: 1. Cyclops communis ; 2. Cypris unifasciata ; 3. Daphnia 



pukx. 



Some of these Entomostraca^ as they are called 

 (that is, insects with shells), inhabit the sea, and may 

 be met with in abundance in clear pools worn in the 



Fig. in. - MAraxE EXTOMasTKACA (^Cythere albo-maculata a.nd Cyclops chelij'ty). 



rocks, sporting about amongst the confervse and 

 corallines that often so fancifully fringe their edges 

 and decorate their sides, formino- a miniature sub- 

 aqueous forest, for myriads of living creatures to 



