248 



MACROUROUS DECAPODS J CRABS. 



than for ^wimming ; and they are consequently usually found 

 upon the shore, or even quite inland, rather than afloat. The 



FIG. 581. CARCINUS MJENAS, (Common small edible Crab); upper side, and under side 

 of the body with the limbs cut short ; a, lateral antenna ; 6, intermediate antenna : c, 

 eye ; d, outer foot jaw ; e, f, g, h, i, base of the five pairs of legs ; k, tail ;. I, sternum. 



tail or post-abdomen is shorter than the thorax, and possesses 

 no appendages or swimmerets at its extremity ; it is folded in 



PIG. 582.-MAIA. 



a state of rest beneath tlie thorax, where it is lodged in a hollow 



