36 Alf Wollebæk. [No. 12 
og: The left lash of the antennae is longer than the 
(fig. 1, Pl. IX) right and reaches considerably beyond the antennal 
| scale; the right lash (i. e. the lash itself without 
the pedunele) is almost of the same length as the 
antennal scale (of 2nd pair of antennae); while the 
left lash is much thinner than the right one. 
O- Right lash stouter than the left, but both of about 
(fig. 2, Pl. IX) the same length. Their length is about two-thirds 
of the antennal scale, and reaches slightly beyond it. 
2nd Pleopod's inner branch, which is different in the two 
sexes, will be found fully described and also illustrated in G. O. Sars' 
*Crustacea” I. "The Norwegian North Atlantic Expedition 1876 
—78” (Christiania 1885). 
Cineinnuli have not been found by me in Se. ferox. 
Habitat: During the eruises of s/s "Michael Sars” in the 
Northern Sea this species has been taken in the following loealities: — 
1) 64948" N. lat. 10914" W. long. (East of Iceland) 350 fathoms 
st. 10 28th July 1900. 
2) Off Jan Mayen, 60—75 fathoms (st. 25, %/s 1900). 
Do. 280 fathoms (*/s 1900). 
3) 66949" N. 26040" W, 300 fathoms (st. 12 (000) 
4). 62953" N. 2994 16, 450 ftoms 68 NNN 
5) 64058" N. 11912" W, 350 fathoms (st. 96, 2 1902). 
On some of the ovigerous females from the waters round Jan 
Mayen (about 60—75 fathoms) there were found under the eggs 
directly attached to the surface of the body several oval extre- 
mely thin-shelled transparent capsules not quite so big as the eggs 
of Scleroeramgon. HEach of these capsules (Pl. X, fig. 3 Aa) con- 
tained from ten to twelve young gasteropods (fig. 3, B and 0). 
As shown by the figures the young gasteropods have aå 
distinet anterior canal, and on the whole bear a close resemblance 
to the young of either Buccinidae or Neptumidae, though to which 
of the two I am not in å position to decide. They much resemble 
the young of Neptunea (Siphonorbis) Damielsseni FrrizLE, and of 
Neptunea (Mohmia) Mohmni FrizrLz, of which species Mr. FrrELE 
has been kind enough to show me specimens for purposes of com- 
parison. It is probably worth noticing in the case of one of 
these two species that not only do the young bear å close resem- 
