al 
the exopodite of the second pair of feet, reaches to near the apex of the first outer-edge spine 
on the third joint. The second outer-edge spine on the third joint extends to the base of the 
third outer-edge spine. “The- appendicular seta on the furcal joints is longer than any of the 
others. Length of female 5 mm. 
This species has only been previously recorded from the North Atlantic. 
3. Paraeuchaeta californica (Esterly). Plate XV, figs. 1—8. 
Luchaeta californica Esterly, 1906, p. 60, pls. IX & X. 
Ten females of this form, which appears to be identical with the Luchaela californica, 
described by C. O. Esrrriy, were found in the plankton collected by the ‘Siboga’ at the fol- 
lowing stations. : 
Stat. 141 (HENSEN vertical net 1500 metres to surface), 2 specimens. — Stat. 143 (HENSEN 
vertical net 1000 metres to surface), 2 specimens. — Stat. 185 (HENSEN vertical net 1536 
metres to surface), I specimen. — Stat. 230 (HENSEN vertical net 2000 metres to surface), 
2 specimens. — Stat. 252, 1 specimen. — Stat. 276 (HENSEN vertical net 750 metres to 
surface), 2 specimens. 
The whole of the specimens from the ‘Siboga’ collections, possessed the peculiar curved 
process projecting from the genital opening. The protuberance is paired, but the one on the 
left side is rather longer than that on the right. When viewed from the side, the forehead 
appears very much contracted, and the rostrum projects forward in an almost continuous line 
with the cephalic margin. 
The outer-edge spine on the second joint of the exopodite of the second pair of feet, 
extends beyond the apex of the first outer-edge spine on the third joint. The second outer-edge 
spine on the third joint just reaches the base of the third outer-edge spine. The second inner 
seta on the furcal joints is much longer than any of the others. 
The figure shewing the lateral view of the genital segment is rather different from that 
given by Estrerty. The protuberances at the side of the genital opening, appear to be more 
pronounced than in EstTERty’s species but this may be due to age. The ‘Siboga’ specimens 
measured 7 mm. in length. 
The species was described by Esterty from a single specimen obtained in the Pacific 
Ocean and its length is given as 8 mm. 
4. Paraeuchaeta propingua (Esterly). Plate XVII, figs. 13—20. 
Luchaeta propinqua Esterly, 1906, p. 61, pls. IX & X. 
Two females which appear to be identical with Esterty’s Euchaeta propingua, were found 
in the plankton collected with the HENSEN vertical net at Station 230, 1500 metres to the surface. 
_ The species bears a close resemblance to Paraeuchaeta californica, but can be distinguished 
from it by the less swollen and more elongate genital segment, when viewed from the dorsal 
aspect. The outer-edge spines on the exopodite of the second pair of feet are proportionally 
shorter than in Paracuchaeta californica. 
The outer-edge spine on the second joint extends to the base of the first outer-edge 
Wa 
