FIG. 253. Barnacles, or Pedunculate Cirripedes (Lepaa anatifera). 



united to this clas>, but now are known to be widely re- 

 moved from it. The former is by some authors removed 

 from the Crustacea. 



3. Tetradecapods, small, fourteen-footed species ; as the 



Fia. 264. Acorn-shells (Balanus) on 

 the Shell of a Whelk (Buccinuin). 



FIG. 255. Water-fleas : 1, Cyclops comminu'x ; 

 2. Cypria unifasdata; 3, Daphnia pulcx. 



