CRUSTACEA OF THE SEASHORE 91 



and are described as shooting through the water like 

 fish. 



The Lobster's habit of seeking shelter in rock- 

 crevices or under stones is one which is shared by a 



FIG. 36 A COMMON HERMIT CRAB (Eupagurus bernhardus) REMOVED 

 FROM THE SHELL 



very large number of shore Crustacea. From some 

 primitive kind of Lobster which discovered the 

 advantages of a portable shelter have been derived 

 the Hermit Crabs. In rock-pools one may often see 

 whelk or periwinkle shells tumbling about with an 



