954 



CRUSTACEA. 



GAMMARUS FUEGIENSIS. 



Feminae : — G. tenello affinis. Pedes tenues. Antennae lmce graciles, 

 dimidio corporis longiores, basi longo, longiore quam flagellum, infra 

 setoso, articulo 2do multo longiore, flagello \§-articidato, articulis 6b- 

 longis, setis paucis, non brevioribus, vix divaricatis, appendice A-articu- 

 lata; 2dce breviores, basi non breviore quam lmarum basis, articulis 2 

 penultimis subozquis, flagello §-articulato, vix longioi-e quam articulus 

 precedents . Pedes 4 antici parvuli, subwqui; lmipaulo major 'es, manu 

 oblongd, marginibus fere parallelis, Mrsutis, apice obliqud truncato, 

 digito lmorum parce longiore quam palma, carpo paulo breviore et non 

 latiore quam manus. Pedes 6 postici valde in&qui, 7 mi Qtis multo 

 longiores, setis paucis brevibus, articulo lmo angusto. Styli condoles 

 postici apicem 2dorum non attingentes; 2di lmique spina prcelongd 

 ad basis apicem armati. 



Female: — Near O. tenellus. Superior antennse slender, longer than 

 half the body, base quite long, longer than flagellum, setose below, 

 second joint much the longest, flagellum sixteen-jointed, joints 

 oblong, setae few, not shorter than joints, and hardly divaricate, ap- 

 pendage four-jointed ; second pair shorter than first, base not 

 shorter than base of first pair, its last two joints subequal, flagellum 

 five-jointed, but little, if any, longer than preceding joint. Four 

 anterior feet with the hands quite small, narrow oblong, the margins 

 nearly parallel, hirsute, obliquely truncate at apex, finger of first pair 

 slightly longer than palm, carpus shorter, and hardly broader than 

 hand. Last three pairs of legs very unequal, seventh pair much 

 the longest. Stylets of last pair not extending as far back as second 

 or first pair; first and second with a very long spine at apex of base, 

 which is a little shorter than branches. 



Plate 65, fig. 8 a, animal, enlarged; b, part of flagellum of first pair; 

 c, appendage of first pair; d, extremity of second pair; e, part of leg of 

 first pair; /, ibid, of second pair; g, ibid, of third or fourth; h, caudal 

 extremity in profile. 



Feejee Islands. 



Length, three and a half lines. The bases of the antennge, which 



