14 THE HAUNTS OF LIFE 
luscs—the bivalves, snails, and cuttlefishes; 
and these—especially the first two classes— 
are well represented on the shore. Bivalves 
are represented by cockle and mussel, oyster 
and clam; snails by the vegetarian periwinkle 
and limpet, and the car- 
nivorous dog-whelk and 
\ buckie; cuttlefish by an 
| occasional octopus hunt- 
ing for crabs among the 
low-tide rocks. Even 
Aristotle knew, over two 
thousand years ago, how 
a shore cuttle shoots out 
an arm and grapples a 
passing fish. 
ARTHROPODS.—On 
| quite a different line of 
life from the Molluscs 
Fic. 1.—TuHe Krnoc-Cras,are the Jointed-Footed 
x pee Shore ‘snimals or Arthropods, 
Arthropod. represented on the shore 
by Crustaceans, such as crab and hermit-crab, 
sea-slater and sand-hopper, acorn-shells and 
water-fleas. Clambering about on the sea- 
weeds and zoophytes there are quaint “ Sea- 
