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Corycaeus spectosus Cleve, 1903, p. 362. 
Corycaeus speciosus Cleve, 1904, p. 189. 
Corycaeus speciosus Wolfenden, 1905(@),.p. 1026. 
Corycaeus spectosus Pearson, 1906, p. 34. 
Corycaeus spectosus van Breemen, 1908, p. 199, fig. 212. 
This distinct species proved to be widely distributed in the area investigated by the 
‘Siboga’. It was present in the plankton collected at the following stations. 
Stat. 36. — Stat. 4o. — Stat. 47». — Stat. 71. — Stat. 75 (HENSEN vertical net, 11 metres to 
surface). — Stat. 81. — Stat. 89. — Stat. 93. — Stat. 96 (day). — Stat. 98. — Stat. 112. — 
Stat. 118 (HENSEN vertical net, 900 metres to surface). — Stat. 121. — Stat. 128 (HENSEN 
vertical net, 700 metres to surface). — Stat. 133. — Stat. 138. — Stat. 141 (HENSEN ver- 
tical net, 1500 metres to surface). — Stat. 142. — Stat. 143 (HENSEN vertical net, 1000 
metres to surface). — Stat. 148 (HENSEN vertical net, 1000 metres to surface). — Stat. 
165. — Stat. 184. — Stat. 185 (HENSEN vertical net, 1536 metres to surface). — Stat. Z03 
(surface). — Stat. 203 (HENSEN vertical net, 1500 metres to surface). — Stat. 213. — 
Stat. 215°. — Stat. 216. — Stat. 217 (horizontal cylinder). — Stat. 220 (HENSEN vertical 
net, 200 metres to surface). — Stat. 223. — Stat. 230 (HENSEN vertical net, 2000 metres 
to surface). — Stat. 245. — Stat. 271. — Stat. 276 (HENSEN vertical net, 750 metres to 
surface). — Stat. 282. — Stat. 304. 
The moderately long and divergent furcal joints of the female of this species readily 
distinguish it from any of the other members of the genus. 
Corycacus speciosus has been recorded from various parts of the Atlantic, Indian and 
Pacific Oceans. 
15. Corycaeus tenues Giesbrecht. 
Corycaeus tenuzs Giesbrecht, 1891, p. 481. 
Corycaeus tenurs Giesbrecht, 1893, p. 660, pl. 51. 
Corycaeus tenuis Thompson & Scott, 1903, p. 286. 
Specimens belonging to the above species were found in the plankton collected at the 
following seven stations. 
Stat. 47°. — Stat. 142. — Stat. 143 (HENSEN vertical net, 1000 metres to surface). — Stat. 
165. — Stat. 203 (HENSEN vertical net, 1500 metres to surface). — Stat. 271. — Stat. 315. 
Corycacus tenuis is a comparatively slender form and resembles Corycaeus luddocki in 
general appearance. The abdomen of the female is composed of two segments. The anal 
segment is narrow and cylindrical in shape. The furcal joints are slender and are nearly twice 
as long as the anal segment. 
This Corycaeus has been recorded from the Indian and Pacific Oceans. 
16. Corycaeus venustus Dana. 
Corycaeus venustus Dana, 1849, pp. 8—61. 
Corycaeus venustus Dana, 1852, p. 1222, pl. 86. 
Corycaeus venustus Brady, 1883, p. 115, pl. LIV. 
Corycaeus venustus Giesbrecht, 1893, p. 674, pls. 4 & 51. 
Corycaeus venustus T. Scott, 1893, p. ITI. 
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