GAMMARIDEA. 393 



following. The epimerals are quite broad to the fifth, and the first 

 covers the mouth in a side view; the fifth is very narrow, and the 

 following still more so. 



The inferior antennae are about one-fourth longer than the superior. 

 The base of the latter scarcely exceeds the first three joints of the 

 base of the former. On the flagellum of the superior antennae, the 

 setae are not as long as width of joints, except one or two nearly 

 equalling it on the under side of each joint, and lying in the direction 

 of the joint. The maxillipeds have a broad apex and a very stout 

 spine or claw, with some setae at apex as long as the spine. 



The finger of the anterior hands is nearly straight, and not longer 

 than the apical margin against which it is closely applied. The 

 second hand has the palm a little depressed for its whole length, and 

 very slightly concave; finger two-thirds the length of hand. Feet of 

 third and fourth pairs equal. 



Female. — Other specimens had the hands of the second pair of feet 

 both small and like those of the first pair ; and these are believed to 

 be the females of this species. The antennae were, however, a little 

 shorter, flagellum of inferior pair about ten-jointed, and these joints a 

 little more oblong. 



A. australis, Dana, Proc. Amer. Acad. Sci., ii. 206. 



Allorchestes brevicornis. 



Antennas breves; lmce corpore plus quadruple- hreviores ; 2dce cmpore 

 plus triplo hreviores, basi brevi, flag ello longiore quam basis, articulis 

 parce oblongis, setis brevissimis, dense verticillatis. Pedes lmiparvuli, 

 manu parce oblongd, subrectangulatd, infra pubescente, apice recti 

 truncate-, paululo excavato, angulo infero acuto, prominulo. Pedes 2di 

 paulo grandiores, manu angusto-ovatd, apice angustd, setarum fascibus 

 parvulis paucis infra instructd, digito brevi (plus dimidio breviore 

 quam manus), fere longitudinali, palmd totd depressd, rectd; carpo 

 breviter transverse-, infra producto. Pedes 4 postici cequi, setis minutis. 



Antennae quite short; the superior not one-fourth as long as the 

 body, and the inferior not one-third ; inferior pair having the base 

 quite short, flagellum longer than base, joints very slightly oblong, 



224 



