gI 
and a basal part. The proximal spine on the free joint is about two and one-half times longer 
than the apical spine. The male is unknown. 
Scolecithricella longifurca is only known from the Pacific Ocean. : 
6. Scolecethricella ctenopus (Giesbrecht). 
Scolecithrix ctenopus Giesbrecht, 1888, Oo 237/o 
Scolecithrix ctenopus Giesbrecht, 1893, p. 266, pls. 13 & 37. 
Scolecithrix ctenopus T. Scott, 1893, p. 48, pl. V, figs. 2—9. 
Scolecithrix ctenopus Giesbrecht & Schmeil, 1898, p. 46. 
One male belonging to this species was found in the plankton collected with the HENsrn 
vertical net at Station 118, 900 metres to the surface. 
The male is easily identified by the structure of the fifth pair of feet. The left foot is 
long and narrow and the end joint is furnished on its inner margin with a comb-like row of 
fine spines. The right foot is very small. Only the male of this form is known. 
When the female is discovered it will probably be found necessary to remove this species 
to another genus, as the fifth pair of feet of the male is more closely related to Xanthocalanus 
than to Scolecethricella. 
Scolecethricella ctenopus has only been recorded from the Pacific Ocean and from the 
Gulf of Guinea. 
7. Scolectthricella marginata (Giesbrecht). 
Scolecithrix marginata Giesbrecht, 1888, p. 338. 
Scolecithrix marginata Giesbrecht, 1893, p. 266, pl. 13. 
Scolecithrix marginata Giesbrecht & Schmeil, 1898, p. 44. 
Thirteen females were obtained from the plankton collected at the following stations. 
Stat. 16, 1 specimen. — Stat. 40, 1 specimen. — Stat. 47°, 1 specimen. — Stat. 66, 1 spe- 
cimens) —— Stat. 75, 1 specimen. — Stat. 118, 1 specimen. —- Stat. 128, 1 specimen. — 
Stat. 142, 1 specimen. — Stat. 143, 1 specimen. — Stat. 185, 2 specimens. — Stat. 203 
(surface), 1 specimen. — Stat. 243, 1 specimen. 
Scolectthricella marginata bears a close resemblance to Scoleczthricella auropecten, but 
can be distinguished from it by the character of the armature of the fifth feet. The inner 
marginal spine is moderately stout and it is fringed with fine spinules. The male is unknown. 
This species is only known from the Pacific Ocean. 
8. Scolectthricella profunda (Giesbrecht). 
Scolecithrix profunda Giesbrecht, 1893, p. 266, pl. 13. 
Scolecithrix profunda Giesbrecht & Schmeil, 1898, p. 43. 
One female was found in the plankton collected with the HrNseN vertical net at Station 
iain es OOmmMerres) to) the Sumtace: 
Scolecithricella profunda resembles Scolectthricella vittata in general appearance, and the 
fifth pair of feet is not unlike that of Scoleccthricella abyssalis at first sight. The apex of the 
gi 
