'75 



indistinctly separated frotri 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 investirated bv the 'Siboea'. 



i. Pontellina plumata (Dana). 



Pontella plumata Dana, 1849, p. 27. 



Pontella turgida Dana, 1849, p. 28. 



Pontellina plumata Dana, 1852, p. 1135, pi. 79. 



Pontellina turgida Dana, 1852, p. 1136, pi. 79. 



Calanops messinensis Claus, 1863, p. 212, pis. XXXVI & XXXVII. 



Pontella plumata Brady, 18S3, p. 92, pi. XXXVII. 



Pontellina plumata Giesbrecht, 1893, p. 497, pis. 4, 25 & 40. 



Pontellina plumata T. Scott, 1893, p. 88. 



Pontellina plumata Giesbrecht, 1S95, p. 260. 



Pontellina plumata Giesbrecht & Schmeil, 1898, p. 149. 



Pontellina plumata I. C. Thompson, 1900, p. 283. 



Pontellina plumata Cleve, 1901, p. 8. 



Pontellina plumata A. Scott, 1902, p. 408. 



Pontellina plumata Thompson & Scott, [903, p. 253. 



Pontellina plumata Cleve, 1903, p. 367. 



Pontellina plumata Cleve, 1904, p. 195. 



Pontellina plumata Wolfenden, 1905 (a), p. 1022. 



Pontellina plumata Sars, igo5(/>), 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. 



Stat. 19. — Stat. 35. — 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. 

 96 (day). — Stat. 96 (night). -- Stat. 98. — Stat. 110. — Stat. 112. — Stat. 117*. — 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. 177a. — Stat. 185 (HENSEN vertical net, 1536 metres to 

 surface). — Stat. 186. — Stat. 189*. — Stats. 194 — 7. — Stat. 203 (surface). — Stat. 2io a . — 

 Stat. 213. — Stat. 2 1 5 a . — 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 



175 



