26 Bulletin Vanderhilt Marine Museum, Vol. V 



The external antennae have the peduncular article stout, with the 

 inner distal angle acute ; the second and third articles elongate, cylin- 

 drical; the acicule is represented by a small process, distally acute; 

 the scaphocerite is about two-thirds as long as the carapace, asymetri- 

 cally oval, with the inner lateral margin widely convex, the outer 

 slightly concave, the distal margin bluntly rounded, and with a deli- 

 cate incomplete fringe of setae. 



The first maxillipeds are slender, leg-like, terminating in a weakly 

 subchelate claw, the propodus is widely suboval, laminate, with a fine 

 brush of setae, across the margin, upon which the weak pointed dac- 

 tylar article closes. 



The second pair of maxillipeds are enormously developed, forming 

 the large retrochela, which has its merus very strong, fitting beneath 

 the free lateral margin of the carapace and having its upper margin 

 rounded and convex on the upper three-fourths, then flattened to a 

 lower plane on the distal forth, with a small, short carina on the distal 

 lateral margin, terminating anteriorly in a small node. The lower 

 margin is deeply grooved, especially anteriorly, for the reception of 

 the retracted propodus; both edges of the groove are carinate, the 

 outer one forming a rounded, laminate process distally. The carpus 

 is short, with a large, rounded, node on the proximal part of the outer 

 lateral margin, separated by a deep constriction from the narrower 

 node of the thickened distal margin; on the anterior lateral surface 

 the margin is subcarinate, terminating in a fixed, acute, subdistal 

 spine. The propodus is one and one-fourth times as long as the cara- 

 pace, very compressed laterally, sublaminate, the outer lateral margin 

 subcarinate outside of the sheathlike apertures into which the dactylar 

 spines fit. There are four articulated spines along the proximal third 

 of the inner margin. The dactyl, (male), is as long as the propodus, 

 very curved and acuminate distally, armed with eight curved, acumi- 

 nate teeth, in addition to the distal, very long curved apical tooth, the 

 series increasing in length from the proximal to the distal one, all 

 fitting into the sheath-like apertures of the propodal margin. 



The third maxillipeds and first and second pairs of thoracic legs 

 are similar, subequal, with the proximal four joints slender, the pro- 

 podus subovate, nearly subcircular, thickish, laminate, with the an- 

 terior margin ciliated, the dactyl is a slender, curved, very acuminate, 

 folding across the ciliate propodal margin, claw-like. 



The third pair of legs are typical of those of this genus. 



