130 SPOLIA ZEYLANICA. 
three segments ; the first, or genital segment, very asymmetrical, 
produced on the left into a simple finger-like process, and on the 
right into a wing-shaped process with a distinct notch on its anterior 
margin (fig. 2). Second segment much shorter than either the first 
or the third, the line of division between it and the latter very in- 
distinct. Caudal rami half the length of the two last abdominal 
segments combined, very broad and ciliated internally. First 
antenne not reaching beyond the cephalothorax. Fifth pair of 
feet (fig. 3) with the endopodite one-jointed, about two-thirds the 
length of the first joint of the exopodite, bearing two short spines 
at its apex. The spinous prolongation of the second joint of the 
exopodite is nearly straight, and provided internally with a row of 
minute denticles ; a long spine springs from near the base of the joint. 
The terminal joint very small, having the appearance of a bifurcate 
spine. Genital operculum with the anterior margin slightly sinuate. 
Length : 2°00 — 2:3 mm. 
Male ; Cephalothorax more slender than that of the female, the 
last segment not dilated laterally. Abdomen consisting of five 
segments. The furcal branches somewhat longer than the last seg- 
ment of the abdomen, narrow, ciliated internally ; the outermost 
seta of the right branch much thicker than the rest, not ciliated, 
and with a small tooth on its inner side (fig.6). The first antennz do 
not reach beyond the cephalothorax. The last joint of the pre- 
hensile antenna armed with a small claw, as in D. denticornis, Wierz. 
The two preceding joints are simple, without prolongations (fig.7). 
The right fifth foot (fig. 8) has the endopodite two-jointed, somewhat 
longer than the first joint of the exopodite. The first joint of the 
exopodite is dilated, the last joint long and narrow, with a long 
terminal claw nearly straight at its base and curved at the end. 
Near the base of this claw is borne a long spine, bent downwards, 
and closely pressed to the side of the last joint in such a way as to be 
scarcely visible when the leg is viewed from in front. This spine, 
which corresponds to the lateral spine of the ordinary type, is found 
in this peculiar position in all the specimens, so that the position 
must be considered normal. In the left fifth foot the endopodite is 
one-jointed, shorter than the first joint of the exopodite and cons- 
tricted at the tip. The first joint of the exopodite bears a strong 
lateral spine and is not distinctly separated from the last joint, 
which has a folded laminar appearance. 
Length : 1°85 — 1:95 mm. 
Mr. Green describes the colour : “‘ Body blue, antennz and forked 
hinder part extremely red.” 
