490 THE OCEAN WORLD. 



is remarkable for its long antennae, which considerably exceed the 

 body. The jaw-feet have their third joint longer than the second, 

 terminating in an obtuse point, with a notch on its interior edge ; 

 eyes wide apart, borne upon large peduncles, which are nearly cylin- 

 drical and short ; anterior feet large, equal, twice the length of the 

 body, and nearly cylindrical in the males ; in the females (Fig. 336) 

 about the length of the body, and compressed, especially towards the 

 hand-claw. The other feet terminate in an elongated nail or claw, 

 which is straight-pointed and channeled longitudinally : carapace 



Fig. 336. Corystes Cassivelaunus, female. 



oblong-oval, terminating in a rostrum anteriorly truncated and bordered 

 posteriorly ; the regions but slightly indicated, with the exception of 

 the cordian region, the branchial or lateral regions being very much 

 elongated. 



Latreille gives the name of Corystes, which signifies a warrior 

 armed, to this genus of Crustaceans, from /copvs, a helmet, but it is 

 perfectly inoffensive. Pennant had already conferred the name of 

 Cassivelaunus, the chief of the Ancient Britons, for the singular 



