Full resolution (JPEG) - On this page / på denna sida - Sidor ...
<< prev. page << föreg. sida << >> nästa sida >> next page >>
Below is the raw OCR text
from the above scanned image.
Do you see an error? Proofread the page now!
Här nedan syns maskintolkade texten från faksimilbilden ovan.
Ser du något fel? Korrekturläs sidan nu!
This page has never been proofread. / Denna sida har aldrig korrekturlästs.
fil
formigt delte i den ene Enile. Imellem disse lange Spikier
findes en Mængde mindre, næsten runde, sammensatte af
tiere Kalkkorn og 0,008— brede, Fig. 15. lli.
Kalkaxen er rund og ender 3..... fra den bnlbose Dels
Bund i en liden Anse.
Farven.
Saavel Hachis med sin,’ Celler som Stilk er blygraa.
Polyperne ere næsten validklare, men faar-et brunligt Skjær
derved, at (let brune Svælg skinnor igjennem. Tentaklerne
ere paa Midten af deres adorale Flade svagt brunlige,
hvilket ogsaa er Tilfældet med Pinnulernc; men forresten
havt? de Hlvglamlsen. fremkaldt, ved Spikelpantseret.
Findested.
Station 101.
they measure from 0.150 o. I Hu"" long, and from
O.OäO—0.028-" broad. A few of them arc, almost
bifurcated in the one extremity. Between these long spicules,
a multitude of smaller ones are found; these are almost
round, and are composed of several calcareous grains; they
measure 0.008— broad (tigs. 15, Hi).
The calcareous axis is round, and terminates in a
small hook, 3..... from the bottom of the bulbous portion.
Colour.
Both, the rachis with its cells, and also, the stem,
are leaden-grey. The polyps are almost as clear as water,
but, owing to the brown gullet appearing visible through, they
obtain a brownish tinge. At the middle of their adoral
surface, the tentacles are faintly brownish, which, also, is
the case with the pinnules; but they, otherwise, have the
leaden lustre produced by the spicular plating.
Habitat.
Station No. 101.
Protoptilum lofotense, n. sp.
Tab. II. Fig. I I 20.
A l’ denne Sotjær blev fundet knu et Fragment, der
dog væsentlig bestod af saagodtsom hele Rachis; Stilken
manglede ganske.
Det forresten vel konserverede Stykke er »o»« langt.
Rachis er meget stiv. Cellerne danne lidt
uregelmæssige. paatvei sgaaende Rækker, st i hver Række, saaledes
nemlig, at den midterste Celle indtager Midtpartiet af
Dorsaltladeii og staar noget høiere end de to andre, en
paa hver Side af Midteellen, Kig. 14. Af disse to laterale
Celler staar i Regelen den ene lidt ovenfor den anden; kun
i en enkelt Række, omtrent midt paa Rachis. stod de
saagodtsom lige overfor hinanden.
Cellerne ere stillede saaledes, at dell ovre Celles
Grunddel rækker til den nedenfor staaendes Aabning;
forresten iagttages Cellernes Stilling og Forhold til hinanden
særdeles godt paa den noget hvælvede Dorsalside, Fig. 14.
Cellerne ere næsten traktformige, 3—5""" lange, deres
indre Væg er fastvoxet til Rachis, og Aabniugens ydre.
fri Rand. .ler er lidt høiere end den indre, fastvoxedc. er
forsynet med 3 stærke, Jancetforraige Tænder, Fig. 14. lli. o.
Paa Midteellens «rund, stundom et Stykke op paa samme,
imellem den og Siderollerne sees runde Zooider, staaende
dels i smaa Urupper, dels enkeltvis, Fig. 17; tie have en
rund. vid Aabning, Kig. I 7, a. Cellerne paa den nederste Del
af Rachis aftage betydeligt i Størrelse og bære uudviklede
Polyper.
l’I. II, Hg«. 14—-’O.
Only a fragment of this sea-pen was found, which,
however, essentially, consisted of almost the entire rachis;
the stem is completely awantiug.
This in other respects well preserved fragment, is
90" long.
The rachis is very erect. The eollsforni somewhat irregular
transversal series, 3 in each series, in such manner, that the
intermediate cell occupies the mesial part of the dorsal
surface, and it projects more than the two others, which are
placed one on each side of the mesial cell (.fig. 14). The
one of these two lateral cells is usually situated, a little
above the other one. and, only, in a single series about
the middle of the rachis, were they found situated,
nearly-opposite to each other.
The cells are so placed, that the basal portion of the
superior cell extends to the aperture of the one placed
below it; the arrangement of the cells and their relation
to each other is, however, particularly well observed on the
somewhat arched dorsal side (fig. 14).
The cells are almost funnel-shaped, and are 3—5’"’"
long, their inner wall is concreted with the rachis, and
the outer free margin of the aperture, which is a little
higher than tin- inner concreted one, is furnished with 3
strong lanceolate teeth (figs. 14, lli. a). At the base of the
mesial cell, occasionally, a small piece up it. and also,
between it and the lateral cells, round zooids are seen
situated, partly, in small groups, partly, singly (fig. 17) and
these have a round wide aperture (fig. 17, a). The cells on
the inferior part of the rachis diminish, considerably, in size,
and carry undeveloped polyps.
<< prev. page << föreg. sida << >> nästa sida >> next page >>
