280 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 
the metasome and not tapered, the genital segment completely 
symmetrical. 
First antennae reaching the genital segment and more setose than 
in the female. The second antennae and mouth parts similar to those 
of the female, but the exopod of the first leg is distinctly 3-segmented. 
The basal segment, however, has no outer spine or inner seta, and the 
spine at the outer distal corner of the second segment is much smaller 
than in the female. The second basipod of the right fifth leg is 
swollen to twice the diameter of the first; the endopod is the same 
length as the proximal segment of the exopod. The terminal segment 
of the exopod is fully as long as the basal and quite slender, with a 
blunt point. The two basipod segments of the left leg are cylindrical 
and reach the center of the right endopod. The left endopod is re- 
duced to a slender spine so small as to be easily overlooked. The basal 
segment of the exopod is one-half longer than the end segment, and 
the latter is a little wider at the tip than at the base. Its complicated 
terminal armature is shown under greater magnification in figure 179, 
and attention is called to the three processes at the distal end and the 
dentate knob and margin on the inner side. Total length 7 to 7.25 mm. 
Allotype male—U.S.N.M. No. 70740; station 5030; latitude 
46°29'30’" N., longitude 145°46’ E., Okhotsk Sea. 
Remarks.—The distinctive characters in this species are the ventral 
protuberance on the genital segment of the female and the detailed 
armature of the end segment of the left fifth leg in the male. 
PAREUCHAETA EXIGUA (Wolfenden) 
PLATE 26, FiaurEs 390-392 
Puchacta exigua WOLFENDEN, Deutsche Siidpolar-Exped., 1901-1903, vol. 12, Zool., 
vol. 4, fase. 4, p. 300, fig. 52a—d, 1911. 
Station 4701. A single female of this species was identified by Sars 
in the plankton of this station between Easter Island and the Gala- 
pagos group. The species does not appear in any of the plankton lists, 
and the present record is the first since its original discovery, as well 
as the first for the Pacific Ocean. Station 4701 is one of the deeper 
tows from 300 fathoms to the surface, suggesting a possible reason 
for the scarcity of the species nearer the surface. Sars made a dorsal 
drawing of the entire body and also a profile drawing of the genital 
segment, which are here reproduced. The profile drawing corre- 
sponds closely with Wolfenden’s figure, while the dorsal view is the 
first full length figure of the species to be published. On the tip of the 
ventral protuberance of the genital segment in the female are two pads 
(fig. 892). One of these is anterior in the center and extends back- 
ward; the other is on the right side and extends across to the left and 
