GAMMARIDEA. 



giore, setls brevibios ; 2dce bad Imarum parce longiores, basi paulo 

 longiore quam flagellum, articulo quarto valde longiore. Manus prima 

 parva, apice parce latior, obliqua, Manus secunda mediocris, subovata 

 infra sparsim setosa, palmd non excavatd, digito breviusculo. Pedes 

 6 postici sensim puree increscentes, non longi, setw brevibus, articulo 

 primo latissimo. Styli caudales secundi ultimos non superantes. 



Body compressed, epimerals large, the fifth much shorter than fourth. 

 Superior antennae little shorter than body, nearly twice as long 

 as the inferior pair, base shorter than flagellum, the three joints 

 subequal, second somewhat the longest, setae short; inferior pair 

 hardly longer than base of superior, base longer than flagellum, 

 fourth joint of base longest. Hand of first pair small, slightly 

 broader at apex and oblique. Hand of second pair moderately 

 large, subovate, base below sparsely setose, palm not excavate, 

 finger rather short. Posterior six feet not long, slightly longer 

 from fifth to seventh pair, setae short, first joint very broad. Second 

 pair of caudal stylets hardly reaching as far as first. 



Plate 66, fig. 2 a, animal, enlarged ; b, mandible, in a position not 

 showing the molar prominence ; c, maxilla of first pair ; d, ibid, of 

 second; e, maxillipeds. 



Island of San Lorenzo, Peru; among sea- weed along the sea-shore. 



Length, Rye to six lines. Colour, violet or violet-brown. The 

 head but little longer than following segment. Caudal segment half 

 as long as posterior caudal stylets, bifid, and very moveable. Base of 

 inferior antennae quite slender, and nearly as long as first two joints 

 of superior pair. Joints of flagellum of either pair, a little oblong, 

 setae few and short. Hand of first pair of feet not twice longer than 

 broad, finger hardly half as long as hand, preceding joint densely hir- 

 sute below, not shorter than hand. Hand of second pair more than 

 twice longer than broad, a few short setae at apex, as well as some 

 slender hairs on inferior side, preceding joint subtriangular, hardly 

 longer than broad, second and third joints slightly oblong, subequal. 

 Third and fourth pairs of legs subequal, about as long as seventh pair, 

 basal joint narrow ; fifth pair shortest and basal joint nearly rotund. 

 Inner apex of third joint in last three pairs prolonged and acute ; a 

 few short setae at apex of joints ; claw about one-third as long as pre- 



