W. S. DEMBOWSKA. 



In the next stage of the process the crab grasps the sponge with 

 the hooks of the 4th and 5th pairs of legs and changing the point 

 on which the hooks hold the inner surface of the case as the crab 

 moves it, lifts its abdominal end above the bottom (Fig. 2C) 

 until the longitudinal axis of the body lies vertically and the 



FIG. 2. Different modes of putting the sponge on the back. 

 For explanation see the text. 



