efterhaanden, saa langt som Zooiderne smalner 
derpaa noget af for atter at udvide sig, idet den ender 1 
en aflang Blære, der stundom antager Kugleformen. 
naa, 
Farven. 
Polypstokken svag gul, Polyperne næsten hvide. 
Findested. 
Station 31, 124, nogle Exemplarer. 
Svava glacialis, varietas alba, nob. 
Tab. 1, Fig. 8. 
Stokken stiv, rund, tynd, 100”” lang. Rachis 687” 
lang; dens øverste Ende er tvers afskaaren, dels nogen, 
dels omgiven af Sarcosoma uden Polyper. Paa et Exem- 
plar, der er 60”” langt, er Rachis 40”. 
Ventralsiden flad, bredere end paa Hovedarten og har 
paa Midten en Fure. Ventralvulsten stærkt fremtrædende, 
IN ®, 
Dorsalsiden hvælvet og har paa Midten en smal 
Længdefure; paa hver Side af denne sees en Rekke 
rudimentære Finner, der dels sidde næsten lige over for 
hinanden, dels afvexlende, Fig. 10. Hver Fimne bærer i 
Regelen 3 Polyper, kun paa et Exemplar saaes 4; men 
paa den øverste Del af Rachis har Finnen kun 2 Polyper. 
Cellerne ere eylindriske, glatte, lidt bugede paa Mid- 
ten, omtrent 2”” lange; deres øverste, frie Rand glat. 
Ved deres Grund ere de saaledes sammenvoxede, at begge de 
ydre Celler ved deres indre Del ere fæstede til Mellemcellen, 
hvoraf følger, at Finnen er baade smal og kort, Fig. 11. 
Ved første Øiekast ser det virkelig ud, som om Cellen ud- 
springer direkte fra Sarcosomaet; men naar man ved en . 
Stilet fører en Celle lidt ud fra Stokken, viser det sig, at 
de to andre følge med. Cellerne have en lidt skraa Ret- 
ning fra Dorsal- mod Ventralfladen, og hvor de støde til 
denne, fremtræder den omtalte Ventralvulst, der repræsen- 
terer de radiære Kanaler.  Strax nedenfor Finnen sees 3 
smaa, runde Zooider, der følge Retningen af Cellerne, 
1943, 10, 
Polypkroppen er temmelig tyk, er af Cellens Længde, 
har 8 fine Længdestriber og udvider sig noget op imod 
Tentakelranden, Fig. 11. Tentaklerne ere næsten dobbelt 
saa lange som Kroppen, Grunden 
temmelig tykke ved 
but it then becomes enlarged, gradually, as far as the zooids 
extend; then becomes somewhat narrower, but again ex- 
pands, and terminates in an oblong vesicle, that occasion- 
ally assumes the spherical form. 
Colour. 
The stalk of the polyp is pale yellow, and the pol- 
yps are almost white. 
Habitat. 
Stations No. 31, No.-124, Å few specimens. 
Svava glacialis, varietas alba, nob. 
Pl. I, fig. 8. 
The stalk is erect, round, and thin; and measures 
100”” in length. The rachis is 68”” long, and it’s superior 
extremity is truncated. It is, partly, devoid of sarcosoma, 
and, partly, surrounded with sarcosoma without polyps. 
In a specimen measuring 60”” long, the rachis is 407” long. 
The ventral side is flat, and broader than in the 
typical species, and it has a furrow in the middle. The 
ventral prominence is strongly conspicuous (fig. 9). 
The dorsal side is arched, and it has a small longi- 
tudinal furrow in the middle; and on each side of this fur- 
row, a series of rudimentary fins is observed; which are 
placed, partly, exactly opposite each other; and _ partly, 
alternating (fig. 10). Hach fin, usually, carries 3 polyps; 
and, only in one specimen, were 4 observed; but, in the 
superior part of the rachis, the fin has only 2 polyps. 
The cells are cylindric, and smooth, and a little bulging 
at the middle; and they measure about 2”” in length. Their 
superior, free extremity, is smooth; and at their base, they 
are conereted, so that both the exterior cells are attached 
by their inner part, to the intermediate cell; which makes 
the fin, both narrow, and short (fig. 11). At first sight, 
it really appears, as if the cell proceeds direct from the 
sarcosoma; but, when, with the assistance of a sharp 
pointed sound, a cell is drawn a little out from the stalk, 
it is seen, that the two others accompany it. The cells 
have a somewhat diagonal direction, from the dorsal to- 
wards the ventrdl surface; and at the point where they 
abut with the latter; the ventral prominence spoken of, 
which represents the radiating canals appears. Immediately 
below the fin, 3 
of the -cells, (fig. 10) are seen. 
small round zooids, which follow the line 
The body of the polyp is rather thick, and of the 
same length as the cell; it has 8, slender longitudinal 
stripes, and becomes somewhat dilated up towards the 
tentacular margin (fig. 11). The tentacles 
are almost 
