128 BOYS AND GIRLS IN BIOLOGY. 



they act both as teeth and feet. The hindmost foot-jaw 

 has three divisions, or branches ; one branch passes up 

 into the side-chamber of the lobster. The middle branch 

 is long and jointed, and it, with its "fellow on the other 



Fig. 111. 



LAKGE -TOOTHED CLAW. 



side, acts as a pair of scissors, cutting food for the mouth. 

 The third branch is jointed and is a walking-leg. The 

 middle foot-jaw (maxillipede) is much like the last, 

 while the front one does not send a piece upward into 



Fig. 112. 



Small-toothed Claw. 



the side-chamber, and one of its branches is flattened 

 out so as to look like leaves. The four walking-legs, 

 the great pincers, or chelae, and the three pair of foot- 

 jaws (maxillipedes), making eight pair in all, belong 



