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efterhaanden, saa langt som Zooiderne naa, smalner
derpaa noget af for atter at udvide sig, idet den ender i
en aflang Blære, der stundom antager Kugleformen.
Parven.
Polypstokken svag gul, Polyporne næsten hvide.
Findested.
Station 31, 124, nogle Exemplarer.
but it then becomes enlarged, gradually, as far as the zooids
extend; then becomes somewhat narrower, but again
expands, and terminates in an oblong vesiele, that
occasionally assumes the spherical form.
Colour.
The stalk of the polyp is pale yellow, and the
polyps are almost white.
Habitat.
Stations No. 31, No. 124, A few specimens.
Svava glacialis, varietas alba, nob.
Tab. 1, Fig. s.
Stokken stiv, rund, tynd, 100""" lang. Hachis 68»""
lang; dens øverste Ende er tvers afskaaren, dels nøgen,
dels omgiven af Sarcosoma uden Polyper. Paa et
Exemplar, der er 60""" langt, er Rachis 40m"’.
Ventralsiden liad, bredere end paa Hovedarten og har
paa Midten en Fure. Ventralvulsten stærkt fremtrædende»
Fig. 9.
Dorsalsiden hvælvet og har paa Midten en smal
Længdefure; paa liver Side af denne sees en Bække
rudimentære Finner, der dels sidde næsten lige over for
hinanden, dels afvexlende, Fig. 10. Hver Finne bærer i
Regelen 3 Polyper, kun paa et Exemplar saaes 4; men
paa clen øverste Del af Rachis har Finnen kun 2 Polyper.
Cellerne ere cylindriske, glatte, lidt bugede paa
Midten, omtrent 2"’m 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
udspringer 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
Retning fra Dorsal- mod Ventralfladen, og hvor tie støde til
donne, fremtræder den omtalte Ventralvulst, der
repræsenterer de radiære Kanaler. Strax nedenfor Finnen sees 3
smaa, runde Zooider, der følge Retningen af Cellerne,
Fig. 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, temmelig tykke ved Grunden
Svava glacialis, varietas alba, nob.
Fl. 1, fig. S.
The stalk is erect, round, and thin; and measures
100mm 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 60ram long, tlie rachis is 40’"’" 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
longitudinal furrow in the middle; and on each side of this
furrow, a series of rudimentary fins is observed; which are
placed, partly, exactly opposite each other;, and partly,
alternating (fig. 10). Each 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 2mm in length. Their
superior, free extremity, is smooth; and at their base, they
are concreted, 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
towards the ventral 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 small round zooids, which follow the line
of the cells, (fig. 10) are seen.
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
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