944 CRUSTACEA. 



Length of body, eight lines. This species is very near the tongensis, 

 from the island of Tongatabu ; but as our figure of that species was 

 made on the spot, and the specimen is not in the collections, we can- 

 not make a comparison throughout. The outer branch of the stylets 

 of the first pair has seven spines above, besides the apical, and its 

 basal part four or fiye. The leg of the fifth pair, in our specimens, 

 has the tarsus turned upward, and in those of the sixth and seventh, 

 it is turned outward. 



Amphithoe filicornis. 



Feminae : — Antmnce corpore vix breviores, flagellis temiissimis, setis per- 

 brevibus et perpaucis, lmce paulo longiores, flagello plus triplo longiore 

 quam basis, articulis oblongis, setis articidorum altemantium inferis 

 longioribus ; Iclarum basi flagellum duplo longius. Pedes 4 antici 

 submqui et eonsimiles ; 2di paulo rnajores, manu mediocri, Tnarginibus 

 parce arcuatis et bene hirsutis, apice oblique truncato, angulo infero 

 subacuto, palmd vix excavatd, digito brevi, carpo parce oblongo, infra 

 laid producto et midto hirsute, articido 3tio apice inferior e triangulato. 

 Pedes 10 postici pilosi, setis sat longis; ftti 7 mi subcequi. 



Female: — Antennae hardly shorter than the body, the setae few and 

 very short, the flagella very slender, superior a little the longer, 

 flagellum more than three times as long as base, joints oblong, setae 

 on under apex of every other joint a little longer than on the others. 

 Inferior pair of antennae having the flagellum twice as long as the 

 base. Four anterior feet subequal and similar; hands of second 

 pair a little the larger, of moderate size, margins sparingly arcuate 

 and very hairy, especially below, apex obliquely truncate, inferior 

 angle subacute, palm hardly excavate, finger short, carpus sparingly 

 oblong, the part below, between third joint and hand, rather broad 

 and dense hairy, third joint at inferior apex triangular. Ten poste- 

 rior feet pilose, setae rather long ; sixth and seventh pairs subequal. 



Plate 65, fig. 1 a, female, enlarged; b, part of flagellum of superior 

 antennae ; c, mandible ; d, leg of second pair ; e, stylet of posterior 

 pair; /, head and antennae of a young individual; g, fifth leg of same. 



Rio Janeiro. 



