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57
Cladiscus Köliikeri, n. sp.
Tab. II, Fig. 8—13.
Stokken meget tynd. stiv, rund: det største Exemplar
48""" langt; Rachis 30""" lang; dens øverste Ende dels
tvers afskaaren og blottet for Sarcosoma i 1— 2""" Længde,
dels noget afstumpet og omgiven af nøgent Sarcosoma;
paa et Exemplar sees Polyper ogsaa paa den overste
Del af’ Rachis, hvor der er Antydning til en
Terminalpolyp, Kig. 8.
Den bulbøse Del (Stilken) er omtrent halvt saa lang
som Racliis og ender i en aflang, stundom næsten
kuglerund. halv gjennemsigtig Blære, hvis Muskulatur, der bestaar
af Længde- og Tverfibre. skinne tydeligt igjennem, og i hvis
Bund der synes at være en ganske liden Aabning, omgiven
af en Sphincter.
Ventralsiden er næstell flad og har paa Midten en
sinai Fure, paa hvis Sider sees en Række Zooider, der ere
klokkeformige og ligge paatvers, saa at. den vide, runde
Miind-aabuing vender udad, imedens Kroppens nederste, smalere
Del vender indad imod Furen, Fig. 9. a. 10, a. Disse
Zooider ere med smaa Mellemrum skilte fra hverandre;
men hvor Cellerne fra liver Side nærmé sig hinanden imod
Bugfuren, ligge Zooiderne tættere, ja næsten lige ’ ved
Siden af hinanden, Fig. i). Fra Zooidens nederste
Sva’lg-onde udgaa to Gastralfilanieiiter. der ere fæstede til Septula,
Fig. 10. h. hvilke gaa paaskraas et Stykke ind i
Sareoso-lnaet.
Dorsalsiden er hvad vet, og kun paa de Steder, hvor
Polypcellerne fra hver Side nærme sig hinanden, er en
kort sinai Fure, Fig. 11. a.
Polypcellerne staa i afvexlende Rækker paa liver Side
af Hachis’s Dorsalflade, i Regelen 3 Celler i hver Rækko;
men paa enkelte Exemplarer findes kun 2. De staa i en
skraa Retning fra Dorsal- til henimod Midten af
Ventralsiden, og hvor der er 3, ere de to sanimenvoxede i
deres nederste Ende, hvorved en sinai Stilk dannes, der
gaar over i Särcosomact, imedens den Tredie gaar
umiddelbart over i Rachis. Fig. 1 2; sjeldent sidde alle 3
isolerede. ,
Cellerne ere cylindriske, glatte, næsten vandklare,
0,68""" lange. 0,52""" brede, lidt smalere nedad, videre
foroven, hvor den fri Rand er forsynet med 8 lange Papiller,
Fig. 12, a. Rummet imellem Cellerækkerne er omtrent
1.5""", og paa en Rachis. der er 30""" lang, findes paa, hver
Side 18 Cellera’kker med udviklede Polyper; nedenfor disse
er der lo 12 uudviklede Cellerækker, der gaar over i en
enkelt Række smaa. runde Zooider, som strække sig et
Stykke ned paa den bulbose Del og ligne fuldkommen de
ovenfor omtalte paa Dorsalsiden. Fig. 8.
Don norske Nor(lli;n>e.\|irilitinn. Kimielsseii oji Koren: l’emiiUitlidn.
Cladiscus Köliikeri, n. sp.
Pl. II. figs, s—13.
The stalk is very thin, erect, and round, and it
measured. in the largest specimen, 48""" in length, whilst the rachis
measured 30’""’ long. The superior extremity is partly
truncated, and for about 1—2’"’" of its length, it is devoid
of sarcosoma, and it is. also, partly blunted, and surrounded
by bare sarcosoma.; but, in one specimen, polyps are seen
upon the superior part of the rachis, where there is also
indication of a terminal polyp (fig. 8).
The bulbous part (the stem) is about half the length
of the rachis, and terminates in an oblong, sometimes
almost spherical, semi-translucent vesicle; whose muscular
structure is composed of longitudinal, and transversal fibres,
which appear.distinctly,visible through it’s wall; and in whose
bottom there appears to be, a quito small aperture, enclosed
by a sphincter.
The ventral side is almost Hat. and has a narrow
furrow in the middle, on whose sides a series of zooids is
Seen. Those are boll-shaped, and placed transversally. in
such manner, that the wide, round, oral aperture, faces
outwards, whilst the inferior, narrow part of the body, faces
inwards towards the furrow (fig. fl. a, 10, a)." Those zooids
are separated from each other by small intervals, and at
the point where the cells of each side approach each other,
in proximity to the ventral furrow, the zooids are situated
closer, indeed, close alongside of each other (fig. fl). From
the inferior extremity of the gullet of the zooids. two
gastral filaments issue; these are secured to the septula
(fig. 10, b) which run. diagonally, a small way into the
sarcosoma.
The dorsal side is arched, and. only, iu those situations
where the cells of the polyps of each side approach other,
is there seen, a short narrow furrow (fig. 11. a).
The cells of the polyps are situated in alternating
series on each side of the dorsal surface of the rachis,
usually, 3 cells in each series, but. in a few specimens,
only 2 cells are so situated. They are placed in a diagonal
direction, from the dorsal side to, nearly, the middle of the
ventral side; and when there are 3 cells, two of them are
concreted in their inferior extremity, producing thus, a
narrow stem which passes into the sarcosoma, whilst, the
third coll passes, immediately," over, into the rachis (fig. 12),
and but rarely, are all the 3 cells isolated.
The colls are cylindrical, smooth, and nearly translucent,
and they measure 0.68""" long and 0.52"’"’ broad. They are
slightly narrower below, and broader above; where, the
free margin is furnished with 8 long papillæ (fig. 12, a).
The space between the series of cells is about 1.5""",
and oil one rachis which measures 30""" long, 18 series of
colls with developed polyps are found on each side; below
these, there are 10—12 undeveloped cellular series, which
pass, over, into a single series of small, round zooids, that
extend a short way down along the bulbous part, and
completely, resemble those pertaining to the dorsal side,
(fig. 8). spoken of above.
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