GAMMARIDEA. 



below, and both the lower side of carpus and of hand hirsute ; upper 

 margin naked, excepting a hair or two on hand. The tarsus of the 

 following legs has no seta below. 



Amphithoe tongensis. 



Corpus cmnpressum, nudum, epimeris latis. Antennas Imce corpore bre~ 

 viores, basi fere duplo breviore quam flagellum, flagello fere 4:0-arti- 

 cidato, setis brevibus; 2do3 paxdo breviores, basi longiore quam basis 

 \marum et flagellum 2darum fere osquantes, setis flagelli inferis longi- 

 tudine articulorum longioribus. Manus quatuor non multo mcequoB, 

 fere semi-ellipticai, dor so rectiusculoB ; lmas paulo minor es ; 2dw me- 

 diocres, apice angustaz, infra hirsute, palmd obliqud, digito dimidio 

 manus breviore, carpo infra breviter producto et perangusto sed non 

 acuto. Pedes 6 postici valde inasqui, sensim increscentes. 



Body compressed, naked, epimerals broad. Superior antennae shorter 

 than the body, base nearly half shorter than flagellum, second 

 joint longest, flagellum about forty-jointed, setse short ; inferior pair 

 a little shorter, base sparingly longer than base of superior, and 

 about half as long as the whole antenna, inferior setae of the flagel- 

 lum longest, longer than the joints. Hands but little unequal, and 

 similar, nearly semi-elliptical, back almost straight; first pair the 

 smaller ; second pair more oblong, narrow at apex, hirsute below, 

 palm oblique, finger small, not half as long as hand, carpus produced 

 below, process short and quite narrow, but not acute. Posterior 

 six feet very unequal, gradually increasing in length. 



Plate 64, fig. 3 a, animal (in part), enlarged ; b, c, portions of an- 

 tennae. 



Tongatabu, Pacific; along the shores of coral islets, in shallow 

 water, among sea-weed. 



Length, six lines. Inferior antennae two-thirds as long as superior. 

 Second joint of superior antennae the longest; joints of flagellum 

 oblong, a little smaller towards base, setae not as long as the joint and 

 alike on the two sides. Joints of flagellum of inferior pair nearly 



