ARTHROPODA, 
285 
Fig. 253.—Barnacles, or Pedunculate Cirripedes {Lepas anatifera). 
united to this class, but now are known to be widely re¬ 
moved from it. The former is by some authors removed 
from the Crustacea. 
3. Tetmdecapods , small, fourteen-footed species; as the 
Fig. 254.— Acorn-shells (Balanus) on 
the Shell.ofa Whelk ( Buccinum ). 
Fig. 255.—Water-fleas: 1, Cyclops communis; 
2. Cypris uni/asciata; 3, Daphnia pulex. 
