14 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 125 
CoMPARISON WITH RELATED sPEcIES.—Like L. varirostratus and 
L. ezilipes this species may be distinguished from all other members 
of the genus by the 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 gentilis may be readily 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 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. 
From L. ezilipes the new species may be separated by the coarser 
lateral spinules on the two long setae on the caudal rami, the more 
unequal nature of the two claws on the second antenna, the lack of a 
blunt process on the inner margin of the mandible, and the form of 
the fifth legs and the genital segment in the female. 
Lichomolgus fissisetiger, new species 
Figures 70-83 
TYPE MATERIAL.—24 99 and 20 oo from a colony of Stereonephthya 
acaulis Verseveldt, in 2 m, Ambafaho, Nosy Bé, Madagascar, col- 
lected Sept. 25, 1964. Holotype 9, allotype, and 34 paratypes (18 92 
and 16 <<”) deposited in the United States National Museum, and 
the remaining paratypes in the collection of A. G. Humes. 
OTHER SPECIMENS.—F rom Stereonephthya acaulis: 45 99 and 89 d' A& 
from 1 colony, in 10 m, Tany Kely, a small island south of Nosy Bé, 
Aug. 21, 1964; 22 99,9 co, and 2 copepodids from 1 colony, in 1 m, 
off Ampombilava, Nosy Bé, Sept. 26, 1964; and 9 99 and 16 oo from 
1 colony, in 2 m, Andraikarekabe, Nosy Komba, near Nosy Bé, 
Oct. 9, 1964. From Stereonephthya papyracea Kikenthal: 53 99, 
80 oo, and 92 copepodids from 1 colony, in 6 m, Tany Kely, Aug. 26, 
1963. From Lemnalia elegans (May): 3 99 from 1 colony, in 1 m, 
Pte. Lokobe, Nosy Bé, Oct. 16, 1960. 
FemMa.Le.—Body (fig. 70) similar to that of L. exilipes and L. 
gentilis. Length 0.99 mm (0.92-1.03 mm) and greatest width 0.49 
mm (0.46-0.51 mm), based on 10 specimens. Ratio of length to 
width of prosome 1.5:1. 
Segment of leg 5 measuring 65u x 143y. Between this segment 
and genital segment a small ventral intersegmental sclerite. Genital 
segment (fig. 71) slightly shorter than wide, 1274 x 143y, in dorsal 
view with its lateral borders rounded. Areas of attachment of egg 
sacs located almost laterally (only slightly dorsally) in posterior 
half of segment. Each area (fig. 72) with 2 small naked setae about 
11u long and an adjacent small unguiform process. Three postgenital 
seements 26u x 82u, 21ux 73y, and 264 x 70u from anterior to posterior. 
