CRUSTACEA. 57 



(Fig. 26, ab 1-5), is reduced to a mere flap turned 

 under the cephalothorax, while its appendages in the 



Fig. 27. 



Cancer irroratus (after Morse). 



Female carrying eggs under the abdomen, which is for this reason extended 

 behind, like the same part in the lobster. 



female (Fig. 27) are reduced in size and covered up 

 between the thorax and abdomen, and arc used only 

 for holding the eggs. 



The abdomen of the male is smaller, more pointed, 

 and the anterior appendages are not so well devel- 

 oped. The cephalothorax (Figs. 25, 26, cth) is broader 

 than that of the lobster, but its appendages are equal 

 in number, consisting of live pairs of walking-legs 

 (Figs. 25, 26, c i-e 5), six pairs of mouth parts, two 

 pairs of antenna; (Fig. 26, a 1, a 2), and a pair of 

 eye-stalks ley). The pupils cannot fail to observe, 

 however, that these appendages are crowded more 



