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ANIMAL STUDIES 



yet so harmonizing with their surroundings that they are 

 as likely to survive as their stronger relatives. In this 



FIG. 67. Kelp-crab (Epialtus productus) in upper part of figure ; to the right the 

 edible crab (Cancer productus), and the shore-crab (Pa-gettia ric/iii). 



connection it is interesting to note that the giant crah of 

 Japan, the largest crustacean, being upward of twenty feet 

 from tip to tip of the legs, is a spider-crab, constructed on 



FIG. 68. The fiddler-crab (Gelasimus). Photograph by Miss MARY RATHBUN. 



the same general pattern as our common coast forms. 

 Between these two extremes numberless variations exist, 



