HABITS OF CRUSTACEANS. 405 



Calappa, feigning death, and concealing the legs under 

 the edge of the carapace, and folding the chelae upon 

 themselves to protect the eyes and mouth. 



The Trapezia are tolerably lively in their habits, with 

 the same manner of hiding, and shuffling under stones, 

 as the Porcettance ; but unlike them, they inhabit the coral 

 branches of deep sunken reefs. 



Many species of Idotea and lara would appear to in- 

 habit the Sea-weed along the shores, as well as that 

 found floating in the high seas. At Quelpart, I found a 

 large and singular species, not yet described, in the 

 former situation ; and in the sea of Celebes, I met with 

 another new form among Algae far from land. 



The species of the genus Lupocyclus (Adams and White) 

 are very active in the water, and keep rather close in 

 shore. They swim by quick, rapid jerks along the 

 bottom, and when caught, pinch rather severely, and 

 wound the fingers with the spines of their chelae. Their 

 habits, indeed, are very similar to those of Lupa, Neptu- 

 nus, and other swimming crabs. 



The Chorinus acanthonotus (Adams and White) inhabits, 

 like the Mithrax, deep water, and prefers those localities 

 where the bottom is covered with weeds ; it is inactive in 

 its movements, and becomes rigid in all its limbs when 

 first captured. 



