272 GAMMARID.E. 



fourth the length of the animal, having the flagellum 

 not more than half as long as the peduncle. The inferior 

 antennae are not quite so long as, and more slender than, 

 the superior, and also have a short flagellum. The first 

 pair of legs are tolerably long ; the wrist is stouter than 

 the hand, and has the infero-distal margin produced to a 

 sharp free point, reaching quite to the extremity of the 

 hand, where it performs the part of a thumb, thus with 

 the finger it makes a tolerably perfect but complex 

 grasping organ, the hand itself being narrow and the 

 finger short. The second pair of legs are about the same 

 length as the first, but the wrist is not so broad as the 

 hand, and does not reach beyond half its length ; the 

 hand is of an oval form and much broader than that of 

 the first pair, it is convex upon the outer and concave 

 upon the inner surface, and when folded up forms a 

 strong shield defending the first pair of legs and the 

 anterior organs of the body ; the palm is slightly convex, 

 even, and continuous with the posterior half of the 

 inferior margin, from which its limit is not defined ; the 

 finger is long and reaches as far as the inferior extremity 

 of the wrist, with which it assists in forming a complex 

 claw of a less perfect character than that of the first pair 

 of legs. The walking legs are nearly of the same uniform 

 length and size. The posterior pair of caudal appendages 

 have the branches of the same length, they are some- 

 what leaf-like in form, reaching further than the ex- 

 tremity of the penultimate, but not further than that of 

 the antepenultimate pair. The central tail-piece is long, 

 lanceolate, and convex upon the upper surface. 



The animal, when alive, possesses a delicate pink or 

 flesh-coloured tinge. It was first taken by Montagu, 

 many years since, on the coast of Devon. We have 

 received it from the Moray Frith through tlie kindness of 



