8 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 121 



Segment of leg 5 (fig. 32) 46m x 107m. Genital segment slightly- 

 wider than long, 110m x 115m, in dorsal view expanded laterally just 

 behind its midregion, posterior to which segment is constricted, with 

 width at posterior end of segment 60m. Each area of attachment of 

 egg sacs, located dorsolaterally on expanded part of segment, bearing 2 

 naked setae and rounded protuberance (more prominent than in pre- 

 vious species). Three postgenital segments 25m x 53m, 21m x 48m, and 

 23m X 46m, respectively, from anterior to posterior. 



Caudal ramus (fig. 33) only slightly longer than wide, 28 X 23m in 

 greatest dimensions, ratio of length to width 1.22 : 1. Length along 

 inner edge to innermost distal seta 19m, along outer edge to base of 

 lateral seta 19m and to base of outermost distal seta 25m. Pedicellate 

 dorsal seta apparently naked. Relative lengths of 6 setae approxi- 

 mately those of L. organicus. 



Ratio of length of prosome to that of urosome 2.6 : 1. 



Egg sacs on all o\dgerous females broken. 



Rostral area (fig. 34) slightly more elongated posteriorly than in L. 

 organicus. Segments of first antenna 23m (44m), 97m, 21m, 46m, 45m, 

 31m, and 20m in length (measured as before) and arrangement of 

 naked setae and aesthetes as in previous species. Second antenna 

 resembling that of L. organicus, but last segment slightly more slender 

 (63m along its outer edge, 39m along its inner edge, and 21m mde). 

 Larger claw 37m long, and more slender claw 32m in length. 



Labrum, mandible, paragnath, and first maxilla like those in L. 

 organicus. Second maxilla closely resembling that species also, but 

 pectinate seta on second segment slightly longer, reaching nearly 

 to end of first tooth; in females studied 4-5 entire teeth, or 4 teeth 

 with distalmost slightly bifurcated. Maxilliped resembling that of 

 L. organicus, but subterminal setiform element apparently not as 

 distinctly bifurcated at its tip. 



Postoral area similar to that in previous species. 



Legs 1-4 with same segmentation and spine and setal formula as 

 in L. organicus. Spine on last segment of endopod of leg 1 27m long. 

 Endopod of leg 4 (fig. 35) wuth the following dimensions: first segment 

 33m X 25m with inner seta 40m long, second segment 60m x 21m (greatest 

 width) and 18m (least width) with 2 terminal spines 25m (outer) 

 and 54m (inner) in length, the ratio about 2.16:1. 



Leg 5 similar to that of L. organicus, dimensions of free segment 

 about 63m X 24m. 



Leg 6 (represented by 2 setae near attachment of egg sacs) like 

 that in previous species. 



Color in life resembling that of L. organicus. 



