286 



COMPARATIVE ZOOLOGY. 



Wood-louse, or Sow-bug (Oniscus\ so common in damp 

 places, the Slaters (Idotea\su\d the Sand-fleas (Gammarus\ 

 seen by the sea-side. 



4. Decapods, having ten legs, as the Shrimp (Orangori), 



FIG. 256. Lobster (Homanu vulgaris). 



FIG. 257 Swimming Crab (Platyonychus). 



