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separated by the presence of a fringe of small spines on the distal end of the first, second 
and third abdominal segments. 
The known distribution of this species appears to be very limited. It has been recorded 
from the Pacific by Giessrecur, and from the Red Sea by CLeve. 
2. Lubbockia sguillimana Claus. 
Lubbockia squillimana Claus, 1863, p. 164, pl. XXV, figs. 1—5. 
Lubbockia squillimana Brady, 1883, p. 118, pls. LIT] & LIV. 
Lubbockia squillimana Giesbrecht, 1893, p. 606, pls. 4 & 48. 
Lubbockia squillimana T. Scott, 1893, p. 115. 
Lubbockia squillimana A. Scott, 1902. p. 419. 
Lubbockia squillimana Thompson & Scott, 1903, p. 285. 
Lubbockia squillimana Wolfenden, 1905 (a), p. 1030. 
This species appeared to be very rare in the area investigated by the ‘Siboga’. One 
specimen was obtained from the plankton collected at each of the following four stations. 
Stat. 118 (HENSEN vertical net, 900 metres to surface). — Stat. 128 (HENSEN vertical net. 
700 metres to surface). — Stat. 143 (HENSEN vertical net, 1000 metres to surface). — Sta. 315, 
Lubbockia squillimana can be distinguished by the absence of small spines on the distal 
end of the first, second and third abdominal segments. 
This Lzadédockza has been recorded from the Atlantic, Indian and Pacific Oceans, and 
from the Mediteranean. 
42. Family CorycarIDAE. 
Genus Corycaeus Dana, 1846. 
The members of this genus are readily recognised by their elongate and sub-cylindrical 
body, by the one or two-jointed abdomen, and by the presence of a pair of comparatively 
large eye-lenses on the frontal margin of the cephalic segment. 
Sixteen species belonging to this genus were represented in the plankton collected by 
the ‘Siboga’ during the investigations in the Malay Archipelago. 
1. Corycaeus alatus Giesbrecht. 
Corycaeus alatus Giesbrecht, 1891, p. 480. 
Corycaeus alatus Giesbrecht, 1893, p. 661, pl. 51. 
Corycaeus alatus 1. C. Thompson, 1900, p. 292. 
Twenty specimens were found in the plankton collected at the following three stations. 
Stat. 66, 8 specimens. — Station 128 (HENSEN vertical net, 700 metres to surface, 6 speci- 
mens. — Stat. 217 (horizontal cylinder), 9 specimens. 
Corycaeus alatus can be distinguished from the other members of the genus by the 
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