286 



TIVE Z 



COMPARATIVE ZOOLOGY. 



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

 places, the Slaters (Idotea),M\& the Sand-fleas (Gammarus), 

 seen by the sea-side. 



4. Decapods, having ten legs, as the Shrimp (Orangon\ 



f! 



FIG. 25(i. Lobster LH<m*o/tw vulgaris). 



5^7. Swimming Crab (Platyonychus). 



