porary, however, and of little moment to the grow- 

 ing crab. This was shown in the case of Jim. When 

 he cast off his old covering he was, in a way of 

 saying, born anew ; no trace of his former disabil- 

 ity remained, regeneration was complete. 



Resting on the floor, he now seemed wan, his 

 paleness being in striking contrast to the drab- 

 black shell he had just abandoned. However, in 

 his weak and defenseless condition, this ghost-like 

 color was obviously a protection, as it seemingly 

 gave him a transparency whereby he was one with 

 his surroundings, rendering him practically invis- 

 ible to the casual eye. But these were not the only 

 changes in his appearance: his now soft hide was 

 wrinkled and shriveled; and when he eventually 

 did essay to move, I could see his legs bend under 

 even the weight of the water-supported body. 



It was five or more minutes that Jim remained 

 immobile. Then he proceeded to dig himself into 

 the sand. This he accomplished by a backward 

 movement; first burying his hind legs, then slowly 

 insinuating his body until with the exception of 

 the tips of his antennae, he was entirely hidden 

 from sight. Here I left him undisturbed. I knew 

 what would henceforth take place. With the folds 



[23O 



