128 MAY. 



ceive a pair of antennae, much beset with short bristles, 

 projecting from the surface. They wag to and fro, and 

 presently up pushes a shelly head, with its pair of 

 stalked and jointed eyes, and two tremendously long 

 angular arms, furnished with awkward- looking nippers 

 at their extremities. Another effort, and the whole 

 Crab emerges from his sandy burrow, and displays his 

 pale buff-coloured shell, wrinkled across, and armed 

 with sharp spiny points at its front and edges. We 

 easily take him up, for his means of escape are feeble, 

 as he uncouthly shuffles on his short legs over the sand ; 

 and his bellicose instincts are not strongly developed, 

 nor, if they were, have those long levers of arms any 

 formidable powers of offence. Latreille gave to the 

 genus the title of Corystes ; which signifies a warrior 

 armed for battle, from icdpvs, a helmet, but its iuoffen- 

 siveness belies the appellation. 1 Pennant had already 

 conferred on the species the name of Cassivelaunus, the 

 ancient British chief immortalized by Caesar. If you 

 were to ask me why this obscure crab should bear a 

 name so renowned, I can answer only by conjecture. 

 The carapace is marked by wrinkles, which, while in 

 some specimens they suggest nothing, in others, espe- 

 cially old males, bear the strongest and most ludicrous 

 resemblance to the face of an ancient man. I have 



1 It is depicted in Plate xiv. 



