THE LOBSTER. 



125 



rounded upper or dorsal part of the body-piece is the 

 tergum, which means the back. Perhaps the body- 



Side, or Pleuron 



Fig. 110. 



ck, or 





tt H 



1 i 1 r"" ,= 



r ! m 





{ j|j 



1 a 









8 g 



Paddle, or 

 Swimmeret. 



Flat Toes. 



One of the Lobster's Body-Pieces, oe Somites. 



pieces (somites) with their joints and paddles, may 

 bring to your mind the stem of the bean with its knots, 

 or nodes, internodes, and leaves. In front of the ab- 

 domen, with its somites, is the cephalo-thorax. This 

 head breast-plate, or cephalo-thorax, has a tergum, or 

 back part, a sternum, or under part, and a pleuron, or 

 side part (Fig. 109), and so many things are hanging down 



