COMMKNSALISM AND PARASITISM. 14$ 



same way that a man holds a torch, as if it 

 would call attention to the fact that it had these 

 terrible weapons at hand. When the Anemones 

 were removed it carefully searched for them, 

 and held them up again when found, and even 

 when the Anemone was cut into pieces the Crab 

 diligently collected them, arranged them as far 

 as possible in their proper places, and held them 

 up together. 



But Sea-anemones are not the only animals 

 that seem to be generally distasteful to Fish. 



FIG. 37. Hermit-crab protruding from its hole m the sponge. 



Many of the Sponges are free from attack, and 

 could serve as a protection to the Hermit- 

 crabs. On our own coast a small brown Sponge 

 is not infrequently brought up in the dredge 

 surrounding and protecting a Hermit-crab; and 

 hidden somewhere in the substance of the sponge, 

 there may always be found a small shell which 

 lies at the end of the hole in which the Crab 

 lives. 



