GAMMARIDEA. 931 



together nearly as long as the third joint. The third and fourth pairs 

 of feet are equal, and not shorter than seventh pair. The sixth and 

 seventh equal ; the fifth a little shorter. Maxillipeds hairy within 

 and at apex. Mandibles with palpus, molar prominence and setse, as 

 usual ; palpus three-jointed, second and third joints with long hairs 

 on margin and apex. Branchiae linear, not ciliated at apex. 

 Swims with great agility. 



Amphithoe jissicauda, Dana, Proc. Ainer. Acad. Sci., Boston, ii. 214. 



Iphimedia capensis. 



Feniinae? — Oculifere reniformes. Antennae subcequce, fere nudee; Irnce 

 parce longiores, dimidii corporis longitudine, bad perbrevi, triplo bre- 

 viore quam flagellum, articulis flagelli parce oblongis, alternis apice 



■ parce latioribus et setas stride appressas articulo parce longiores infra 

 gerentibus, setis aliis brevissimis; 2dce basi brevi. Pedes 4 antici par- 

 vuli, manu oblongd, marginibus fere parallelis, inferiore hirsuto, apice 

 oblique truncatd palmam efficiente, digito palmd non longiore, palmd 

 fere nudd, carpo oblongo, dimidii raanus longitudine, infra obtuso et 

 hirsido. Pedes 4 postici subcequi, tennes, setis perbrevibus, articulo 5 to 

 angusto, setarum 7 parihus infra ornata, latitudine articuli breviorum, 

 setis supernw breviores. Styli caudales spimdis numerosis ornati, 

 ramis lmorum styliformibus, posticorum lo?igiusculis, foliaceis, acumi- 

 natis, marginibus cum spinulis midtis armatis. 



Female? — Eyes subreniform. Antennas subequal, nearly naked; 

 superior pair sparingly the longer, about half as long as body, base 

 very short, about one-third as long as the flagellum, joints of flagel- 

 lum sparingly oblong, the alternate a little broader at apex, and 

 bearing two or three setae longer than the joint, and close appressed 

 to it, other setae very short ; base of second pair quite short. Feet 

 of four anterior pairs quite small, hands oblong, margins nearly 

 parallel, under margin hirsute, apex obliquely truncate, forming 

 the palm, finger not longer than the palm, palm nearly naked, 

 carpus oblong, half as long as the hand, obtuse below and hirsute. 

 Feet of four posterior pairs subequal, slender, setae all very short, 

 fifth joint slender, setae of lower margin in seven sets, and about 



