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(surface). — Stat. 220 (HENSEN vertical net, 200 metres to surface). — Stat. 230 (HENSEN 
vertical net, 2000 metres to surface). — Stat. 243 (HENSEN vertical net, 1000 metres to 
surface). — Stat. 252. — Stat. 276 (HENSEN vertical net, 750 metres to surface). — Stat. 
282. -- Stat. 304. — Stat. 315. 
The antennules extend to about the middle of the furcal joints. The anal segment is 
shorter than the segment immediately in front. The furcal joints are equal to the combined 
length of the second, third and fourth abdominal segments. 
Lucicutia flavicornts is a comparatively small species. It appears to be widely distributed 
throughout the great oceans. 
2. Lucicutia clause (Giesbrecht). 
Leuckartia claust Giesbrecht, 1889, p. 812. 
Leuckartia claust Giesbrecht, 1893, p. 359, pls. 19 & 38. 
Lucicutia claust Giesbrecht & Schmeil, 1898, p. I11. 
Leuckartia claust Cleve, 1901, p. 7. 
Lucicutia claust 1. C. Thompson, 1903, p. 26. 
Lucicutia claust Cleve, 1904, Dp. 192. 
Lucicutia claust Sars, 1905(0), p. 3. 
Eight specimens belonging to the above species were obtained from the plankton collected 
at the following stations. 
Stat. 141 (HENSEN vertical net, 1500 metres to surface), 2 specimens. — Stat. 143 (HENSEN 
vertical net, 1000 metres to surface), I specimen. — Stat. 184, 1 specimen. — Stat. 203 
(HENSEN vertical net, 1500 metres to surface), 3 specimens. — Stat. 230 (HENSEN vertical 
net, 2000 metres to surface), I specimen. 
Lucicutia claust is a slightly larger form than Luczcutza flavecornis. The two sexes can 
easily be distinguished by the presence of a tooth-like projection on each side of the cephalic 
segment, when. the specimen is viewed from above. 
This species appears to be rather rare and its known distribution is limited. 
3. Lucicutia bicornuta Wolfenden. Plate XXXIX, figs. 1—11. 
Lucicutia bicornuta Wolfenden, 1905, p. 24, pl. II. 
Lucicutia aurita G. O. Sars, 1905 (4), p. 8. 
Lucicutia bicornuta Sars, 1907(a@), p. 3. 
A single male specimen identical with the form described and illustrated by WoLFENDEN 
in ‘Plankton Studies’, Part 1, 1905, was found in the plankton collected with the HENsEN vertical 
net at Station 230, 2000 metres to the surface. 
The species is readily recognised by the truncate frontal margin being produced at each 
corner into a strong spine, and by the presence of a ventrally directed hook-like spine on 
each side of the cephalic segment. The furcal joints are long and slender. Each furcal joint 
is as long as the combined length of the whole of the abdominal segments. The rami of the 
rostrum are very short and stout. The second joint of the basiopodite of the male left fifth 
foot is produced internally into a short stout process with a dentate apex. Length of ‘Siboga’ 
male 8 mm. 
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