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29
den halvrunde Række af 6 store Polyper, fuldkommen lig
dein, som ovenfor ere omtalte paa høire Side, Fig. 25, 8, 8,
8; 8, 8, 8.
Maalene af Polyperne ere foretagne paa
Spiritus-exemplaret; men paa det levende Exemplar, der er tegnet
Tab. XI, XII, havde Polyperne en ganske anden Størrelse;
saaledes vare de i den ydre Række, naar de vare fuldt
udstrakte, indtil 100""" lange, 50—60’"’" i Omkreds ved
Grunden og Tentaklerne 70—80lange.
Vi have paa dette Exemplar sögt at fremhæve de
Rester af en tidligere bilateral Symetri, som endnu ved
en skrupuløs Undersøgelse kan findes; men vi tilstaa, at
den bilaterale Regelmæssighed er for en stor Del
forsvunden, idet Rachis danner en næsten rund Kvast, hvorpaa
Polyperne, der udgjøre Duskerne, ere stillede i 3
ringformede Rækker om de 3 Centralpolyper. I første, ydre
Række ere de 12 store Polyper; denne Række er
fuldkommen sammenhængende, saa at Ventralfladen er indtagen
af 2 Polyper, Fig. 25, c, c; indenfor denne Række kommer
en anden Række af 12 noget mindre Polyper, men denne
Ring er afbrudt paa Ventralfladen, hvor der er en Afstand
af 5""" imellem-de 2 Polyper, der ikke slutte sig sammen,
Fig. 25, d, d. Endelig kan man forestille sig en 3die, indre
Række, der bestaar af 4 Polyper, som forresten staa saa
uregelmæssigt og usammenhængende, at man kun med Tvang
kan danne en afbrudt Ring deraf. Imellem den ydre og
mellemste Kreds, nær Ventralfladen,-sees en liden, konisk
Forhøining, der er en ganske ung Polyp.
Polyperne ere cylindriske, meget tykke ved Grunden
og kunne kontrahere sig stærkt, baade efter Længden og
Bredden. Paa Kroppens ydre Flade, der i udspændt
Tilstand er glat og uden Folder, sees 8 temmelig brede
Længdelinier, der betegne Insertionsstederne for de 8
Septa. Huden er ikke gjennehisigtig, saaledes som
Tilfældet er paa de tidligere omtalte; thi den er meget stærkt
kontraheret som Følge af Opbevaringen i Spiritus.
Tentaklerne og Mundskiven er som paa No. 7, men de 8
Mundlæber ere større og mere fremspringende.
Axen gaar lige ned til Bunden af Stokken, hvor den
ender med en kort Hage. Den er som sædvanligt firkantet
med 4 dybe Furer og afrundede Kanter; men den er
meget mere spiralforniigt dreiet efter hele sin Længde end
nogen af de foregaaende.
Alle 31 Polyper have udviklede Generationsorganer
og ere Hanner.
Farven er som paa No. 7; so forresten den i levende
Live afbildede Figur, Tab. XII, hvor Farven er gjengivet
med Nøiagtighed.
35""" in length, and 10’"’" in thickness, and the tentacles have
a length of 40""" (flg. 25, 7, 7). Outside of these 7 polyps;
the semicircular series of 6 large polyps appears, exactly
similar to those spoken of above as pertaining to the
right side (fig. 25. 8, 8, 8, 8, 8, 8).
The measurements of the polyps are taken from the
specimen in alcohol, but in the live specimen which is
seen illustrated on PI. XI, XII, the polyps had quite
another size, so that, those in the outer series, when they
were fully extended, measured up to 1.00""" long, and
50—60""" in circumference at the base, and the tentacles
were 70—80""" long.
We have endeavoured in this specimen, to trace
out the remains of any earlier bilateral arrangement that
a searching examination might still bring to light; but, we
confess, that the bilateral regularity has for the most part
disappeared; whilst, the rachis forms a nearly round knob,
on which, the polyps which compose the tufts, are situated
in 3 annullar series, around the 3 central polyps. In the
first outer series, there are 12 large polyps in a perfectly
continuous series, so that, the ventral surface is occupied
by 2 polyps (fig. 25, c, c). Inside this series; another
series of 12, somewhat smaller polyps appears, but this
series is interrupted on the ventral surface, and here,
there is an interval of 5""" between the 2 polyps which do
not unite with each other (fig. 25, d, d). Finally, we may
conceive a 3r<i inner series, consisting of 4 polyps, which
otherwise, are situated so irregularly, and unconnectedly,
that it is only with difficulty, an interrupted ring can
be formed out of them. Between the external and the
middle ring; near the ventral surface; a small .conical
prominence is observed, this is a quite young polyp.
The polyps are cylindric, and very thick at the base.
They are capable of great longitudinal and lateral
contraction. On the exterior surface of the body; which in
the dilated condition is smooth, and free from folds; 8
rather broad, longitudinal lines are observed, denoting the
points of insertion for the 8 septa. The integument is
not translucent; as is the case in the specimens we have
already spoken of; because, it is very greatly contracted
in consequence of its preservation in alcohol. The
tentacles and the oral disk are like those of No. 7 specimen,
but the 8 labiæ of the oral aperture are larger and more
prominent.
The axis extends quite to the base of the stalk,
where, it terminates in a short hook. It is, as is
generally the case, quadrangular, having 4 deep grooves,
and rounded edges; but, it is much more spirally
twisted along the whole of its length, than any of the
preceding specimens.
All the 31 polyps have, developed generative organs,
and are males.
The colour is like that of No. 7 specimen, and is
otherwise like the illustration; (Pl. XII) taken from life;
in which the colour is exactly repeated.
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