1887.1 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 5G9 



tapering processes. The brown globular bodies at the posterior end of 

 the abdomen are proportionally largo and promin(Mifc. Tlio ogg-tiibes 

 are slender, elongate, and of a dark brown color. 



The anterior antennse originate at the front margin, just within tlie 

 produced lateral corners, and do not reach quite to the sides. They 

 are slender, gradually tapering, and consist of about eight joints, of 

 unequal lengths, not regnlarly alternating as to length. A few pointed 

 papilhe of different sizes occur at irregular intervals along the antenn;e, 

 and several at the distal end. The posterior antenn;e or prehensile 

 claws are very large, and taper gradually and regularly from the base 

 to the tip, near which they become strongly curved. The basal joint 

 is much longer tliau tbe distal, and much more sleuderthan the corre- 

 sponding joint in X. i>'reroo/7m'. The proboscis is oblong in its main 

 portion with straight and parallel sides, but rapidly narrows toward the 

 end, which is produced in a moderately slender tip, in which the ends 

 of the mandibles are plainly distinguishable. The palpi at the sides 

 of the proboscis are stout, arise from several large, rounded, lobe-like 

 processes, and terminate in two stout, pointed, closely-placed spines, 

 one of whicli is about twice as long as the other. The first maxillipeds 

 consist of a moderately broad, elongate, basal joint, a slender second 

 joint of about half the length of the former, and with a small spine on 

 the outer margin near the distal end, and a short pointed, rapidly tap- 

 ering and very slightly curved terminal joint, bearing a row of minute 

 spines along the concave side. The second maxillipeds are much larger 

 than the first, and consist of a rather broad basal joint (much narrower, 

 however, than the corresponding one in L. BrevoortUv) with the posterior 

 margin slightly concave, *the anterior strongly convex, and a terminal 

 joint of about half the same length, partly divided near the distal end, 

 stout at the base, but otherwise rather slender, tapering and slightly 

 curved near the tip. 



The thoracic feet of the first pair, which follow closely after the last 

 maxillipeds, consist of a broad basal process and two principal append- 

 ages. The larger appendage is attached at the outer end of the basal 

 process, and is oblong in shape, with straight and nearly parallel sides 

 of which the inner is shorter than the outer. The proximal end is cut 

 off obliquely, the distal rounded and provided with five closely placed, 

 subequal, stout, acute, and slightly curved spines. The inner appendage 

 is attached near the middle of the basal process, and is composed of an 

 elongate, subovate joint, terminating in a single, elongate, slender 

 spine of about its own length. Another shorter and stouter acute 

 spine, directed backwards, originates j ust within the base of this append- 

 age. The feet of the second i^air consist of three minute appendages, 

 apparently originating directly from a fold of the surface. The inner- 

 most appendage resembles the corresponding one of the first pair, and 

 terminates in a similar but shorter spine or papilla, which appears to 

 be retractile. The middle appendage is ovate in outline, the distal end 



