CRUSTACEA. 85 



it does not always wait until the houso is vacant, but occa- 

 casionally ejects the rightful occupant vi et armis.* 



In the Crustacea of the next order, the tail is not only 

 longer but is different in form, being divided into five broad 



Fig. 53. SPINY LOBSTER (REDUCED). 



flat pieces, so as to act with great effect upon the water. 

 The common Lobster (Homarus vulgaris) is perhaps the best 



* History of British Crustacea, page 173 ; Published by Van Voorst. 



