Sfe^N k|^ fe^ 1^ ^1 



Fig. 211. — Diagram of the dorsal surface of a King-Crab, to 

 show the head-shield carrying the central eyes {oc') and 

 the lateral eyes {oc), and corresponding to six segments 

 / to VI) ; also the posterior, shield, corresponding to 

 twelve segments {VII to XVIII), and the terminal post- 

 anal spine (PA), which is identical in position with the 

 scorpion's sting (see Figs. 210 and 213). 



284 



