ïóo 



of two segments. The structure of the fifth pair of feet of the tvvo sexes readily distinguishes 

 this species from any of the other known members of the genus. 



Pontella fera has been recorded from the Indian and Pacific Oceans. 



3. Pontella princeps Dana. 



Pontella princeps Dana, 1849, p. 34. 



Pontella princeps Giesbrecht, 1893, p. 461, pis. 24 & 40. 

 Pontellina (Iva) princeps Claus, 1S93, p. 273. 

 Pontella princeps Giesbrecht & Schmeil, 1898, p. 142. 

 Pontella princeps Thompson & Scott, 1903, p. 252. 



Two females and two males belonging to this species were obtained from the plankton 

 collected at the following stations. 



Stat. 35, male. — Stat. 66, female. — Stat. 117% female. — Stat. 138, male. 



The females are closely allied to Pontella ailantica, but they differ from that species 

 in the structure of the abdomen. 



This Pontella has been recorded from the Indian and Pacific Oceans. 



4. Pontella securifer Brady. 



Pontella securifer Brady, 1883, p. 96, pi. XLV, figs. 1 — 9. 



Pontella securifer Giesbrecht, 1893, p. 461, pis. 24 & 40. 



Pontella securifer T. Scott, 1893, p. 86. 

 Pontellina (Ivellina) securifer Claus, 1893, p. 274. 



Pontella securifer Giesbrecht & Schmeil, 1898. p. 142. 



Pontella securifer Thompson & Scott, 1903, p. 252. 



Pontella securifer Geve, 1904, p. 195. 



Pontella securifer Wolfenden, 1905 (a). p. 102 1. 



Seventeen females and twenty males belonging to the above species were obtained from 

 the plankton collected at the following stations. 



Stat. 19, 2 specimens. ■ — Stat. 35, 3 specimens. — Stat. 36, t specimen. — Stat. ^-j , 1 spe- 

 cimen. — Stat. 66, 4 specimens. — Stat. 98, 2 specimens. — Stat. 1 10, 3 specimens. — 

 Stat. 117", 2 specimens. — Stat. 203 (surface), 2 specimens. — Stat. 229, 2 specimens. — 

 Stat. 230 (Hexsen vertical net, 2000 metres to surface), 2 specimens. — Stat. 282, 1 spe- 

 cimen. — Stat. 315. 2 specimens. 



This species can readily be recognised by the prominent lens in the base of the rostrum, 

 and by the structure of the fifth pair of feet of the two sexes. 



Pontella securifer has been recorded from the warm parts of the Atlantic and Indian Oceans. 



5. Pontella alafa nov. sp. Plate LI, figs. 11 — 15. 



Female — length 3,58 mm. 



Seen from above, the body is elongate and moderately robust. The cephalic segment 

 is furnished with side hooks and a pair of dorsal eye-lenses. The last thoracic segment is 



160 



