MARINE BIOLOGICAL STATION AT PORT ERIN. 



95 



anemone, Adamsia palliata. These two very unlike 

 animals, the hermit-crab and the sea-anemone, seem to be 

 mutually helpful ; the crab carries about and incidentally 

 feeds the anemone, while the latter by its stinging threads 

 possibly keeps off fishes and other enemies, and so protects 

 its partner in this strange association. 



Fig. XVI. 



The highest of Decapod Crustacea are the Brachyura, 

 or Crabs, which have the abdomen permanently tucked up 

 under the carapace, so as not to be visible from above 

 (see fig. XVII.). The 10 conspicuous legs, which give 

 the name " Decapoda," are clearly seen, while smaller 



