40 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 124 



Rostral plate cordiform, broader than long, apex deflexed; median 

 carina present on anterior half. 



Raptorial claw with 10 teeth (12-13 on other specimens), outer 

 margin of dactylus sinuate; propodus with some proximal hairs, as in 

 female L. maculata; dorsal ridge of carpus terminating in a single 

 spine, deflexed mesioventrally. 



Mandibular palp and 5 epipods present. 



Ventral keel of eighth thoracic somite produced into a posteriorly 

 directed spine. 



Abdomen smooth, unarmed; sixth somite with irregular submedian 

 area separated from longitudinal lateral boss by a longitudinal sulcus; 

 sixth somite with blunt triangular projection in front of articulation 

 of each uropod. 



Telson much broader than long, pitted dorsally, with low, raised 

 triangular median boss and 2 lower oval submedian bosses on dorsal 

 surface; posterior margin with 4 pairs of projections, outer 2 best 

 developed. 



Basal segment of uropod with dorsal spine; proximal segment of 

 exopod with 9 slender, movable spines on outer margin, last not 

 extending to midlength of distal segment; distal segment of exopod 

 longer than proximal; endopod broad, triangular, over twice as long 

 as wide; basal prolongation consisting of 2 spines, trefoil in cross 

 section, inner longer; ventral surface of uropodal protopod unarmed 

 at articulation of endopod. 



Color.— Body with dark bands, as in L. maculata; carapace with 

 3 dark bands and body with broad, dark band at articulation of each 

 somite; claw lacking prominent dark bars, distal half of merus and 

 proximal half of propodus with dark flush; basal fourth of all walking 

 legs dark; sixth abdominal somite dark; telson with broad, transverse 

 dark patch, most of distal margin lighter; basal segment of uropod 

 dark; distal half of proximal segment and proximal half of distal 

 segment of uropodal exopod dark, distal half of distal segment light; 

 most of distal portion of uropodal endopod dark. 



Size.- — -Single male examined, TL 161.7. Other measurements: 

 carapace length 28.3; cornea width 8.0; rostral plate length 6.4, 

 width 7.4; antenna! scale length 17.2, width 5.4; fifth abdominal 

 somite width 35.2; telson length 21.8, width 32.0. 



Discussion.- — The slender antennal scale, outlined in dark pigment, 

 the anterior projection on the basal portion of the antenna, the lack 

 of dark bands on the claw, the deflexed spine on the carpus of the claw, 

 the triangular keel on the eighth thoracic somite, and the unarmed 

 ventral surface of the uropodal protopod will distinguish this species 

 from all others in the genus. 



