38 HOMES UNDEK THE SEA. 



delicate ridges, which, when the " bone " is broken, look 

 like rows of little pillars. This structure enables the 

 " bone " to float on the surface of the sea, and its object 

 appears to be to strengthen the body without increasing 

 its weight. 



The common slug possesses an internal shell exactly 



THE COMMON SEPIA. 



analogous to that of the Sepia, though not so elaborate 

 in structure. 



In the Mediterranean, the Sepia is so plentiful that, 

 after a storm, the Cuttle-bones are heaped up into a 

 lidge several miles in length. The inhabitants of the 

 coast use the animal largely for food, and mostly take it 

 by night, spearing it by the aid of torches. 



These " bones " are held in great favour by bird 



