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BOYS AND GIRLS IN BIOLOGY. 



matter, or pigment. Two round balls are often found 

 in the lobster's stomach, and people call them " crab's 

 eyes." These balls are made of lime, which it is said 

 the lobster has been storing up for his new shell, and 

 that the lime finds its way to the outside skin and makes 

 it hard in three or four days. Thus the lobster moves 

 " out of the old house into the new " every year till he 

 gets his growth ; then he lives contentedly under the 

 same roof till he dies, or till some one throws him 

 into boiling water. I hope the members of the Society 

 for the Prevention of Cruelty to Animals will not for- 

 get these cruel lobster-pots. 



