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indistinctly separated from the anal segment. The antennae and mandible palps are furnished 
with very long and densely plumose setae. 
The only known representative of this genus appeared to be well distributed throughout 
the area investigated by the ‘Siboga’. 
1. Pontellina plumata (Dana). 
Pontella plumata Dana, 1849, p. 27. 
Pontella turgida Dana, 1849, p. 28. 
Pontellina plumata Dana, 1852, p. 1135, pl. 79. 
Pontellina turgida Dana, 1852, p. 1136, pl. 79. 
Calanops messtnensis Claus, 1863, p. 212, pls. XXXVI & XXXVII. 
Pontella plumata Brady, 1883, p. 92, pl. XX XVII. 
Pontellina plumata Giesbrecht, 1893, p. 497, pls. 4, 25 & 40. 
Pontellina plumata TY. Scott, 1893, p. 88. 
Pontellina plumata Giesbrecht, 1895, p. 260. 
Pontellina plumata Giesbrecht & Schmeil, 1898, p. 149. 
Pontellina plumata 1. C. Thompson, 1900, p. 283. 
Pontellina plumata Cleve, 1901, p. 8. 
Pontellina plumata A. Scott, 1902, p. 408. 
Pontellina plumata Thompson & Scott, 1903, p. 253. 
Pontellina plumata Cleve, 1903, p. 367. 
Pontellina plumata Cleve, 1904, p. 195. 
Pontellina plumata Wolfenden, 1905 (a), p. 1022. 
Pontellina plumata Sars, 1905 (0), p. 6. 
This characteristic form, although not common, proved to have a wide distribution in the 
Malay Archipelago. The following are the stations where it was noted. 
Stable Stats 5-9 Stat. 37. — Stat. 40. — Stat. 47°. — Stat. 50: — Stat./66. — Stat. 
71. — Stat. 75 (HENSEN vertical net, 11 metres to surface). — Stat. 81. — Stat.93. — Stat. 
Conca) a Staoo (nicht) — = Stat..o8. —— Stat. 110) Stats112 =" Statwin 74 Stat. 
118 (HENSEN vertical net, 900 metres to surface). — Stat. 121. — Stat. 122. — Stat. 124. — 
Stat. 128 (HENSEN vertical net, 700 metres to surface). — Stat. 129. — Stat. 133. — Stat. 
136. — Stat. 138. — Stat. 144. — Stat. 148 (HENSEN vertical net, 1000 metres to surface). — 
Stat. 157. — Stat. 172. — Stat. 1773. — Stat. 185 (HENSEN vertical net, 1536 metres to 
surface). — Stat. 186. — Stat. 189%. — Stats. 194—7. — Stat. 203 (surface). — Stat. 210%. — 
Stat. 213. — Stat. 215%. — Stat. 217 (surface). — Stat. 217 (horizontal cylinder). — Stat. 
220 (surface). — Stat. 223. — Stat. 224. — Stat. 229. — Stat. 245. — Stat. 271. — Stat. 
276 (HENSEN vertical net, 750 metres to surface). — Stat. 282. — Stat. 315. 
This species is readily identified by its short robust body, and by the long plumose 
setae on the antennae and mandible palps. 
Pontellina plumata appears to be generally distributed in all the warm regions of the 
great oceans. 
Genus Calanopia Dana, 1852. 
The members of this genus are readily separated from the other genera, by the structure 
of the fifth pair of feet of the two sexes. The fifth pair of the female consists of a two- 
jointed basiopodite, and a one or two-jointed exopodite. The endopodite is entirely absent. The 
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