858 CRUSTACEA. 



body, flagellum hardly as long as the base, about sixteen-jointed, 

 joints slightly oblong, setae few, hardly as long as diameter of 

 joints ; superior pair very short, half shorter than base of inferior, 

 flagellum three-jointed. Feet with short setae, those of fifth joint 

 of three posterior pairs not longer than diameter of joint ; first pair 

 of feet longer than second, ending in a curved claw, which is a little 

 shorter than preceding joint; hand of second pair semi-ovate, the 

 upper margin straight, minute finger ending remote from apex, 

 longitudinal in position, third joint half shorter than fourth, rectan- 

 gulate below ; fifth pair of legs half shorter than sixth ; sixth and 

 seventh subequal, fifth joint quite narrow, the setules of upper and 

 under margins about equal, and in six or seven sets. 

 Male: — Feet of first pair, as in females; second with a large hand, 

 which is subovate, the palm ending in a low angle, and not con- 

 cave, nor emarginate, nor toothed, but set with spinules, finger 

 long, carpus very transverse, third joint rectangular, a little oblong, 

 naked. 



Plate 57, fig. 2 a, female, enlarged; b, antenna of first pair; c, part 

 of flagellum of second pair ; d, extremity of same, more enlarged ; e, 

 extremity of leg of second pair; /, ibid, of fifth pair; g, ibid, of sixth 

 pair. — h, hand of male. 



Eio Janeiro ; dredged in the harbour. 



Length, six lines. The fifth epimeral is much smaller than the 

 fourth, which is the largest. The eyes are rather large, and approxi- 

 mate in front. The flagellum of the female superior antennae consists 

 of three subequal joints, and together they are a little longer than 

 half the three basal joints. The finger of the female hand of second 

 pair is articulated with the dorsal margin of the hand about two-fifths 

 its length from the extremity, and is very short, stopping far short of 

 the extremity ; the preceding joint is about twice as broad as the 

 hand, very strongly arcuate below, somewhat less so above, and very 

 nearly naked. The flagellum of the second pair of antennae (as in 

 other Gammaridea) terminates in a tuft of setae, (fig. 2 d,) like the 

 same in the Oniscidae and other Isopoda. The posterior stylets are 

 very short, and, as usual, simple. The setules of the other stylets are 

 few and short. 



