22, PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 125 
0.36 mm), based on 10 specimens. Ratio of length to width of prosome 
}56i:1; 
Segment of leg 5 measuring 44u x 107u. Genital segment (fig. 108) 
somewhat longer than wide, 239 x 213y. No ventral intersegzmental 
sclerite between these segments. Four postgenital segments 26u x 65p, 
23u x 65y, 184 x 63, and 23u x 70 respectively. 
Caudal ramus similar to that of female, 834 x 39u dorsally, 85 x 39u 
ventrally. 
Ratio of length of prosome to that of urosome 1.45:1. 
Rostral area as in female. First antenna similar to that of female, 
but with 3 aesthetes added as in 5 previous species, so that formula 
is same as for those males; aesthetes resembling those of L. spinulafer. 
Second antenna (fig. 109) resembling that of female, but with promi- 
nent spinules on inner margins of first 2 segments and small spinules 
added on segments 3 and 4 as in figure. 
Labrum, mandible, paragnath, first maxilla, and second maxilla as 
in female. Maxilliped (fig. 110) resembling that of LZ. spinulifer, with 
claw 224y along its axis. 
Area between maxillipeds and first pair of legs as in female. 
Legs 1-4 segmented as in 5 previous species, with spine and setal 
formula as in those males. Endopod of leg 1 (fig. 111) with long 
terminal spine recurved and concave inwardly, bearing 2 rows of 
strong spinules: outer spine short and differentially barbed on its 
2 margins. Legs 2-4 as in female. 
Leg 5 (fig. 112) with free segment 55u x 10u (extremes in 4 males 
53u-59u x Qu-l1ly), its seta 44u and naked, its spine 20u with an 
outer fringe; seta on body near insertion of free segment 35y and 
naked. 
Leg 6 similar to that of LZ. spinulifer, the 2 small naked setae about 
Su long. 
Spermatophore (fig. 113), attached to female, elongated, 195yu x 83y, 
not including neck. 
Color in life as in female. 
Erymo.tocy.—The specific name aculeatus, from Latin= provided 
with prickles, refers to the nature of the terminal spine on the endopod 
of leg 1 in the male of this species. 
COMPARISON WITH RELATED SPECIES.—Lichomolgus aculeatus differs 
from all five species described above in having a seta (instead of a 
spine) on the first segment of the endopod of leg 4. The new species 
appears to be closely related to L. spinulifer Humes and Frost, 1964, 
from Lemnalia sp. at Nosy Bé, yet differs from it in several 
significant features: the relatively shorter caudal ramus (2.2:1, instead 
of 3.3:1 as in L. spinulifer), the long terminal claws on the second 
antenna, the small pointed process on the convex side of the mandible, 
