Svava ! glacialis, n. g. et sp. 
Tab. I, fig. 1. 
Stokken stiv, tynd, rund, 90”” lang (det største Fx- 
emplar).  Rachis 56”” lang; i dens øverste Ende viser 
Axen sig blottet for Sarcosoma i 3”” Længde. 
Ventralfladen lidt hvælvet, glat, forsynet med en tem- 
melig bred Midtfure, Fig. 2, og paa hver Side af denne 
Antydninger til Ventralvulster. 
Dorsalfladen hvælvet, har en smal Midtfure; paa hver 
Side af denne en Række afvexlende, yderst smaa, næsten 
stilkede Finner, der hver bære i Regelen 4 Polyper, Fig. 
1. 3; paa den øverste Del af Rachis sees dels 3, dels 2 
Polyper i hver Finne, Fig. 1. 
Cellerne ere eylindriske, glatte, 2”” lange og stillede 
lidt paatvers nedenfra opad, fra Dorsal- imod Ventralfla- 
den, Fig. 1. 3. Deres nedre, lidt smalere Del er paa de 
to Hjørnecellers indre Flade sammenyoxet med de to mel- 
lemste Celler, hvorved den rudimentære Finne dannes, 
Fig. 5; de to Hjørnecellers ydre Flade er fri. Cellernes 
øverste Rand er forsynet med 8 smaa, bløde Papiller, Fig. 
5, a, der næsten ganske udslettes, naar Celleaabningen er 
udvidet, hvorved Randen faar et undulerende Udseende, 
Fig. 5. 6, a. Naar Cellen er lukket, Polypen indtrukken, 
har den dels en ovoid, dels en elliptisk Form. Paa en- 
kelte Finner sees 3 Celler at være sammenhængende, ime- 
dens den 4de er saagodtsom fri, kun fæstet til Finnen 
ved en smal Forlængelse af Cellens nederste Del. 
Polypkroppen er cylindrisk, glat, omtrent 2”” lang, 
men udvider sig traktformigt mod Tentakelskiven, Fig. 6; 
denne er noget hvælvet og har i Midten en lidt aflang Mund- 
aabning. Tentaklerne ere tykke, lige saa lange som Kroppen, 
og som sædvanligt forsynede med Cirrer. Nedenfor hver 
Finne sees i en lidt paatversgaaende Række 4 yderst smaa, 
runde Zooider, Fig. 3. 4, a. 5, b; har Finnen kun 2 eller 
3 Polyper, retter Zooidernes Antal sig deretter. 
Paa hver Side af Raehis's Dorsalfure er der paa det 
største Exemplar 16 Finner, der bære fuldt udviklede Po- 
lyper; nedenfor disse komme 12, næsten paatversgaaende, 
listeformige Finner med 4, 3 og 2 uudviklede Polyper, og 
endelig sees en enkelt Række af smaa, runde Zooider, Fig. 
1, der strækker sig langt nedover Stilken. 
Stilken er 34”” lang, rund; hvor Zooiderækken tager 
sin Begyndelse er den temmelig smal men udvider sig 
1 Svava, en Valkyrie. 
Svava'! glacialis, n. 2. et sp. 
PL I, åg Å 
The stalk is erect, thin, and round, and measures 
(the largest specimen) 90”” in length. The rachis meas- 
ures 56”” in length. For a length of 3””, the superior 
extremity of the axis is devoid of sarcosoma. 
The ventral surface is somewhat arched, and smooth, 
and is furnished with a rather broad mesial furrow, (fig. 2) 
on each side of which, there are indications of ventral 
prominences. 
The dorsal surface is arched, and has a narrow mes- 
ial furrow; and on each side of this, a series of alternat- 
ing, extremely minute, almost pedunculated fins; each of 
which carries, usually, four polyps (figs. 1, 3). On the super- 
ior part of the rachis, sometimes 3, sometimes 2 polyps, 
are seen on each fin (fig. 1). 
The cells are cylindrical, and smooth, and measure 2”” 
in length; they are placed a little diagonally, from down- 
wards to upwards from the dorsal towards the ventral 
surface (figs 1. 3). Their lower somewhat narrower part, 
is, at the inner surface of the two corner cells, conereted 
with the two middle cells; and the rudimentary fin is 
thereby formed (fig. 5). The outer surface of the two 
corner cells is free. The upper margin of the cells is 
furnished with, 8 small, soft, papille, (fig. 5, a) which 
are almost entirely obliterated when the aperture of the 
cell is dilated, and the margin obtains, thus, a wavy ap- 
pearance (fig. 5. 6, a). When the cell is closed and the 
polyp retracted, it has, partly, an ovate, and, partly, an 
elliptic form. In a few fins, 3 cells are seen to be at- 
tached to each other, whilst the fourth is very nearly de- 
tached; in as much, that it is only attached to the fin 
by a narrow prolongation of the inferior part of the cell. 
The body of the polyp is cylindrical, and smooth; 
and about 2”” long, but it becomes dilated in a funnel- 
shape, towards the tentacular disk (fig. 6). The latter is 
a little arched, and in the middle, has a somewhat oblong 
oral aperture. The tentacles are thick, and of uniform 
length with the body, and, as usual, are furnished with pin- 
nulæ. Below each fin, and placed in a somewhat transversal 
series; 4 extremely small, round, zooids are observed (figs. 
3. 4, a. 5, b). If the fin is only furnished with 2, or 3 
polyps, the number of the zooids is in proportion thereto. 
In the largest specimens; there are 16 fins, situated 
on each side of the dorsal furrow of the rachis, carry- 
ing} fully developed polyps; below these again, are, 12 
nearly transverse fillet-formed fins, with 4, 3 and 2 un- 
developed polyps; and finally, a single series of small round 
zooids is seen, (fig. 1) which, extend far down the stem. 
The stem is 34”” long, and is round. At the point 
where the zooidal series commences, it is rather narrow; 
Svava = A valkyrie (a battle nymph). 
