10 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 125 
spinules on both sides. Outermost terminal seta with inner spinules 
proximally. 
Surfaces of prosome and urosome with minute hairs as in female. 
Ratio of length of prosome to that of urosome 1.43:1. 
Rostral area as in female. 
First antenna resembling that of female, but with 2 long aesthetes 
added on second segment and another aesthete on fourth segment, 
so that formula is same as for male of L. varirostratus. 
Second antenna, labrum, mandible, paragnath, first maxilla, and 
second maxilla similar to those in female. Maxilliped (fig. 52) less 
slender than in L. varirostratus, but segmented and armed similarly. 
Claw slender and 170y along its axis; proximal region of claw slightly 
swollen and faintly striated. 
Area between maxilliped and first pair of legs as in female. 
Legs 1-4 segmented as in L. varirostratus, with spine and setal 
formula as in male of that species. Endopod of leg 1 (fig. 53) slightly 
geniculate. Third segment elongated, with outer terminal spine 
straight, having lateral spinules and hyaline tip, inner terminal 
spine bent, with strong spinules along its inner distal edge; spinous 
process between these 2 spines enlarged and finely spinose. No obvious 
sexual dimorphism in legs 2-4. 
Leg 5 (fig. 54) with a very elongated slender straight free segment, 
55u x 11y, bearing on its outer surface a few scales and terminally 
an outer naked seta 56u long and an inner spine 29u long with short 
lateral spinules. No spinules on body near insertion of free segment. 
Leg 6 similar to that in Z. varirostratus, with 2 naked setae 414 
and 78y in length. 
Spermatophore (fig. 55), attached to female, elongated, 174y x 91u, 
not including neck. 
Color in life as in L. varirostratus. 
Erymotocy.—The specific name ezilipes, from Latin exilis=slender 
and pes=foot, refers to the elongated slender form of leg 5 in both 
sexes of this species. 
CoMPARISON WITH RELATED sPEcIES.—Like L. varirostratus, this 
species may be distinguished from all other known species in the genus 
on the basis of a combination of two characters: the spine (instead 
of a seta) on the first segment of the endopod of leg 4 and the two 
unusually long terminal claws on the second antenna. 
Lichomolgus exilipes may readily be separated from L. varirostratus 
by the form of the rostrum, the presence of lateral spinules on the 
two long setae on the caudal rami, the form of the fifth legs and the 
genital segment in the female, and the structure of the two spines on 
the last segment of the endopod of leg 1 in the male. 
