282 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 
The first antennae reach five or six segments beyond the caudal rami 
and are rather sparsely setose. The endopod of the second antenna is 
longer and stouter than the exopod. The endopods of the first and 
second legs are 1-segmented, those of the second pair giving evidence 
that they are made of up two fused segments. Exopods of first legs 
2-segmented; all the other leg rami 3-segmented. Total length 5 mm. 
Metasome 3.54 mm. long, 1.20 mm. wide. 
Male—Metasome similar to that of the female but proportionally 
shorter; forehead without a notch above the conical rostrum. Uro- 
some nearly half as long as the metasome and 5-segmented ; anal seg- 
ment very short; appendicular setae very long and strongly geniculate. 
Antennae, mouth parts, and first four pairs of legs like those of the 
female; fifth legs of a peculiar pattern. The two basipods of the 
right fifth leg are the same width and only moderately inflated. The 
endopod is a trifle longer than the basal segment of the exopod and 
bluntly pointed. Both segments of the exopod are curved a little, the 
basal segment longer than the terminal. The two basipods of the left 
leg reach the center of the basal segment of the right exopod; the left 
endopod is entirely lacking. The terminal armature of the left exo- 
pod is shown in magnified detail in figure 185. The teeth on the 
inner margin of the rigid ramus, the tuft of hairs on the inner margin 
of the movable ramus, and the spherical swelling tipped with hairs at 
the base between the two rami are distinctive characters. Total . 
length 4.10 mm. Metasome 3.25 mm. long, 0.81 mm. wide. 
Allotype male—U.S.N.M. No. 70781; station 4667, latitude 12°00’ 
S., longitude 83°40’ W.., off Peru. 
Remarks.—The exceptional length of the first antennae combined 
with the size and shape of the ventral protuberance on the genital seg- 
ment will serve to identify the female. The details of the end segment 
of the left fifth leg will do the same for the male. A depth of 1,000 to 
1,800 meters is recorded by Giesbrecht for the vertical tows containing 
the original types; one of the Albatross tows was a vertical one from 
2,000 fathoms to the surface, one from 400 fathoms, 20 from 300 
fathoms, another was a tow of 2 fathoms below the surface, three 
were made at the surface, and at three stations surface captures were 
effected with the aid of an electric-light lure. 
PAREUCHAETA HANSENII (With) 
Huchaete hansenii With, Danish Ingolf—Expedition, vol. 3, pt. 4, p. 181, figs. 
52a-b, 1915. 
Stations 16; 4538; 4759; 5120; 5185; H. 3789. Originally estab- 
lished by With upon a single mutilated female from the northern 
Atlantic, it was obtained at three stations in the Monaco plankton 
and the female was fully described and figured by Sars. 
