D. C. Danielssen. 
[No. i. 
They are attached to the septal walls by an extremely loose, 
very delicate connective-tissue, that like a tape-like membrane accom- 
panies them (Pl. II fig. 9 a). From this membrane, pedunculated, 
navel-shaped capsules issue, one on each side (Pl. II fig. 7 f, 9 b); 
in each of these capsules an ovum is developed (Pl. II fig. 9 c). 
We see that the ovaries, here, are different from those found 
in Fenja mirabilis, where they do not differ materially from the 
ovarian character of Actinidæ in general; whilst in Ægir frigidns 
they greatly approach the form which is general in Alcyonidæ. 
The testicles lie still farther from the gullet-tube and intestine, 
and have their origin a little way behind the oral disc, behind 
both the ovaries and mesenterial filaments. They are formed in 
the same manner as in Actinidæ usually, and twine backwards for 
the same length as the ovaries (Pl. II fig. 10). The follicles of the 
testicles are pretty large, and contain round cells with particularly 
large nuclei; the spermatozoa develope themselves in those cells. 
In the specimen examined the spermatozoa are but slightly devel- 
oped, and show as extremely small round shining molecules. 
Habitat. 
Station No. 124. A couple of specimens, of which one is much 
injured by the dredge. 
» No. 200. Several specimens, but all of them more or less 
injured, inasmuch that a large part of the body-integument is 
torn away, so that only the oral disc, tentacles, also the 
gullet-tube and intestine with attached septa, are serviceable 
for investigations. It is possible that the animal bores itself 
with its posterior extremity into the sand, and that the 
dredge, therefore, as it dragged it along, tore the integu- 
mental covering in pieces. 
Specific Characteristics. 
The body cylindrical; 30 m. m. in length, 8 — 10 m. m. in 
breadth in the anterior extremity, and 4— 5 m. m. in breadth in the 
posterior extremity, which is furnished with a round anus. The 
exterior surface of the body has a thin, mucous, vaginal covering; 
also 12 ribs, between which depressed longitudinal belts in which 
scattered, extremely small, suckers appear. The anterior part bare. 
The oral disc broader than the anterior margin of the body, folded, 
