16 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 125 
Leg 6 probably represented by the 2 setae near areas of attachment 
of each egg sac (see fig. 72). 
Color in life in transmitted light somewhat opaque, eye red, ovary 
dark gray, egg sacs gray. 
Mauze.—Body (fig. 79) resembling that of female in general form. 
Length 0.78 mm (0.74-0.81 mm) and greatest width 0.29 mm (0.27-— 
0.30 mm), based on 10 specimens. Ratio of length to width of prosome 
1.48:1. 
Segment of leg 5 measuring 36y x 91y. Genital segment (fig. 80) as 
long as wide, 185y x 185u. No ventral intersegmental sclerite between 
these segments. Four postgenital segments 174 x 50u, 144 x 52u, 
12u x 50p, and 19y x 52y respectively. 
Caudal ramus resembling that of female but smaller, 14y x 22y | 
dorsally, 184 x 22u ventrally. | 
Ratio of length of prosome to that of urosome 1.62:1. 
Rostral area as in female. First antenna similar to that of female, 
but with 3 aesthetes added as in 3 previous species, so that formula 
is same as for those males. Aesthetes much longer than in preceding 
species, proximalmost one 240y in length. Second antenna, labrum, 
mandible, paragnath, first maxilla, and second maxilla like those in 
female. Maxilliped resembling in general form that of L. gentilis, but 
one of setae on inner surface of second segment terminating in several 
pointed spiniform elements (fig. 81). Claw 133y in length (measured 
along its axis). 
Area between maxillipeds and first pair of legs as in female. 
Legs 1-4 segmented as in 3 previous species, with spine and setal 
formula as in those males. Endopod of leg 1 (fig. 82) only slightly 
geniculate. Third segment resembling that of L. gentilis. Legs 2-4 as 
in female. 
Leg 5 (see fig. 80) resembling that of L. exilipes, with free segment 
52u xX 9u, terminally with inner spine 18y and barbed, outer seta 
68u and naked. 
Leg 6 (fig. 83) similar to that in 3 preceding species, with 2 naked 
setae 44u and 66y in length. 
Spermatophore not observed. 
Color in life in transmitted light more translucid than in female, 
eye red, genital segment hyaline. 
Erymo.toey.—The specific name fissisetiger, from Latin fissus=split 
and setiger=bearing a seta, refers to the nature of the seta on the 
second segment of the maxilliped in the male of this species. 
CoMPARISON WITH RELATED SPECIES.—Like the three preceding 
species L. fissisetiger may be distinguished from all other members of 
the genus by the combination of two characters: the spine (instead 
