GAMMARIDEA. 943 



were perfect in the number of thoracic legs ; the superior antennae in 

 them had six joints, and the inferior four. 



A. brevipes, Dana, Proc. Amer. Acad. Sci., Boston, ii. 216. 



Amphithoe brasiliensis. 



Tongensi affinis. Corpus compressum, epimeris lafis. Antennas, lrnce 

 dimidio corporis multo longiores, flagello prcelongo, tenuissimo, setis 

 perbrevibus ; 2dce paulo breviores, Mrsutce, basi vix breviore quam fla- 

 gellum, articulis flagelli versus basin vix oblongo, setis inferis phis 

 duplo longioribus. Manus quatuor suhcequce, \mce paulo rainores 

 supra parce arcuatw, infra rotundatw, hirsutm, palmd obliquo-trans- 

 versd, digito dimidii manus longitudine; 2da3 mediocres, hirsutiores, 

 apice oblique truncatos et infra acutm, palmd vix excavatd, longe hir- 

 sutdy carpo infra latiusculo dense hii'suto, articulo 3tio infra rotun- 

 dato. Pedes 3tii Clique setis sparsis articulo parce brevioribus. 



Near the A. tongensis. Body compressed, epimerals large. Superior 

 antennae much longer than half the body, flagellum very long and 

 slender, setae quite short. Inferior pair a little shorter than supe- 

 rior, hirsute, base hardly shorter than flagellum, joints of flagellum 

 towards base slightly oblong, setae of lower side more than twice 

 as long as those above. The four hands subequal ; first pair the 

 smallest, slightly arcuate above, rounded below, and hirsute, palm 

 obliquo-transverse, finger half as long as hand. Hands of second 

 pair of moderate size, more hirsute than preceding, obliquo-trans- 

 verse at apex, palm hardly excavate, long hirsute, acute at lower 

 limit, carpus broad, produced below, and densely hairy. Setae of 

 legs of third and fourth pairs few, nearly as long as joint. 



Plate 64, fig. 6 a, animal, enlarged ; b, part of flagellum of superior 

 antennae; c, ibid, of inferior, from basal half; d, ibid., from towards 

 apex; e, e', mandible, in different positions; /, maxilla of first pair; g, 

 ibid, of second pair; h, maxillipeds; i, part of leg of first pair; 7c, ibid, 

 of second pair; ?, ibid, of fourth ; m, outer branch of first pair of stylets ; 

 n, posterior stylet. 



Rio Janeiro, Brazil. 



