gO 
Scolecithrix bradyz Cleve, 1901, p. 9. 
Scolecithrix bradyi 1. C. Thompson, 1903, p. 20. 
Scolecithrix bradyi Thompson & Scott, 1903, p. 245. 
Scolecithrix bradyzt Sars, 1905 (a), p. 5. 
Scolecithrix bradyi Esterly, 1905, p. 165, fig. 27. 
Scolecithrix bradyi van Breemen, 1908, p. 77, fig. 81. 
Six females and one male were obtained from the plankton collected at the following 
stations. 
Stat. 141 (1500 metres to surface), I specimen. — Stat. 142, I specimen. — Stat. 143 (1000 
metres to surface, I specimen. — Stat. 203 (seefeee), I specimen. — Stat. 243 (1000 metres 
to surface), I specimen. — Stat. 276 (750 metres to surface), I specimen. 
The female is easily recognised by the asymmetrical last thoracic segment when viewed 
from above. The posterior margins of the segment are considerably produced, and the right 
side extends slightly beyond the end of the genital segment. The genital segment is large 
and asymmetrical. It is longer than the combined length of the other abdominal segments. 
The fifth pair of feet is very small and easily overlooked. Each foot consists of a lamelliform 
appendage with a pointed apex. The male fifth pair is moderately large and prehensile. The 
last joint of the right foot is forked. 
Scolecithricella bradyi appears to have a fairly wide distribution. 
4. Scolecethricella longecornis (TY. Scott.). 
Scolecithrix longicornis T. Scott, 1893, p. 50, pl. V, figs. 20—28. 
Scolecithrix longicornis Giesbrecht & Schmeil, 1898, p. 45. 
Four females belonging to this species were found in the plankton collected at the fol- 
lowing stations. 
Stat. 142, I specimen. — Stat. 143 (1000 metres to surface), 2 specimens. — Stat. 148 (1000 
metres to surface), I specimen. 
Scolecethricella longicornis is easily recognised by its long antennules, and by the peculiar 
form of the fifth pair of feet. The fifth pair of feet is composed of two free joints attached to 
a basal part. The apex of the second joint is produced into a point. The inner distal angle 
of the joint is furnished with an elongate and moderately strong spine. The male is unknown. 
This species has hitherto only been recorded from the Gulf of Guinea. 
5. Scolecithricella longifurca (Giesbrecht). 
Scolecithrix longifurca Giesbrecht, 1888, p. 338. 
Scolecithrix longifurca Giesbrecht, 1893, p. 266, pls. 13, 37. 
Scolecithrix longifurca Giesbrecht & Schmeil, 1898, p. 45. 
One female of this species was found in the plankton collected with the HENsEN vertical 
net at Station 128, 700 metres to the surface. 
Scolecithricella longifurca can be recognised by its moderately long abdomen, and by the 
proportional length of the segments. The anal segment is very short and the furcal joints are 
twice as long as broad. The female fifth pair is small. Each foot is composed of one free joint 
90 
