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30
Findested.
Station 18.
No. 9.
Tab. VII. Kip. _’4.
Stilken fra Grunddelen til Racliis 1560 """ lang. Den
bulbøse Del er tenformig og ender i en stump Spids|; dens
nedre Del er næsten rund. omtrent 50""" i Omkreds, imedens
den øvre, mere udvidede Del er noget fladtrykt paa
Yen-tral- og Dorsalfladen og 60""" i Omkreds. Fra denne ovre
Udvidning. aftager Stilken successivt, indtil den indtager
kun 3""" i Bredde op imod den skedeformige Del. Denne
ei- 12""" bred. hvor den gaar over i Rachis og tæt besat
med Zooider, der strække sig nedover Stilken, hvor de paa
Ventral- og Dorsalfladen ordne sig til Rækker lige ned til
den runde Del af Bulbus. Paa dette Exemplar er Stilken
aldeles ikke dreiet, forend op imod Rachis, hvor den i
Forening med denne gjor en S-fonnig Boining, Fig. 24.
Rachis er bægerformet, næsten rund, kun lidt fladtrykt
paa Ventralfladen og har en Omkreds af 90""", Fig. 24, a •
den er 26""" høi, 30""" bred, lidt hvælvet nedenfra opad
men mere fladtrykt paa Midten og ba>rer 28 Polvper.
Ventralfladen • er 10""" bred paa det bredeste, men smalner
af opad, saa at den op imod Endepolypen er omtrent 5"""
bred. Fig. 24, b. Dorsalfladen er bred og kan inddeles i
en Centraldel og to lidt paaskraagaaende Sideflader. Hele
Rvgsiden er tæt besat med Zooider, som danne
laneetfor-mige Felter ind imellem Polyperne, der indtage en næsten
lignende Stilling som paa No. 8 med Undtagelse af, at
Ventralfladen her ei1 nøgen, det vil sige uden Polyper.
Ligesom paa de foregaaende er lier 3 Centralpolyper,
der indtage Midtpartiet af Rygsiden, og hvoraf Endepolypen,
som sædvanligt, er den mindste.
Terminalpolypen danner Grændsen foroven imellem
Ventral- og Dorsalfladen; den er 16""" lang, 5""" bred med
25""" lange Tentakler, Fig. 24, 1*. De to bagenfor
(nedenfor) paa Rygsidens Midtlinie staaende Polyper ere 25"""
lange, 5’"’" brede; Tentaklerne lige lange som Kroppen.
De centrale Dorsalpolyper staa 1 2""" fra hinannen, fig.
24. 1. 1. Ved Siden af dem til Venstre staa i en lidt
krumbøiet Række 3 Polyper, Fig. 24, 2, 2. 2, af hvilke
den forreste, nærmest Ventralfladen, er 15""" lang. 3"""
bred. Tentaklerne af Kroppens Længde, Fig. 24; den ba-
Habitat.
Station, No. 18.
No. 9 specimen.
Pl. VII. fiff. 24.
The stem measures 1560""" in length from the basal
part to the rachis. The bulbous part is spindle-fonned,
and terminates in a blunt point. It’s inferior portion is
almost round, and is about 50""" in circumference; whilst
the superior, more dilated portion, is somewhat flattened
on the ventral and dorsal surfaces, and is 60""" in
circumference. From the superior dilation, the stem diminishes,
gradually, in breadth, until, in proximity to the sheath
formed portion, it is only 3""" broad. The sheath-formed
part is 12""" broad at tin- point where is passes into the
rachis; and is, closely, beset with zooids, which extend
themselves down along the stem, where they arrange
themselves in series, on the ventral and dorsal surfaces right
down to the round part of the bulb. In this specimen, the
stem is not at all twisted until in proximity to the rachis,
and then, in conjunction with the rachis. it forms an S
formed curve (fig. 24).
The rachis is chalice-formed, nearly round, and only
a little flattened on the ventral surface, and it has a
circumference of 90 """ (fig. 24, a). It is 26""" high, and 30"""
broad, and is a little arched from below, upwards, but
more flattened in the middle, and it also carries 28 polyps.
The ventral surface is 10""" broad at the broadest part,
but diminishes in breadth, upwards, so that, up towards
the terminal polyp, it is only about 5’"’" broad (fig. 24. b).
The dorsal surface is broad, and may be subdivided into
a central portion, and two, somewhat diagonally .sloping,
lateral surfaces. The whole of the dorsal side is, closely,
beset with zooids, forming lanceolate areas between the
polyps; assuming a nearly similar arrangement as in
No. 8 specimen, with the exception, that in this
specimen, the ventral surface is bare, that is to say, is devoid
of polyps.
Just as in the previous specimen, there are in this
one, 3 central polyps occupying the middle portion of the
dorsal side, and, of these, the terminal poly]), as is usually
the case, is the smallest one.
The terminal polyp forms the superior margin
between the ventral and dorsal surface. It is 16""" long, and
5""" broad, and the tentacles are 25""" in length (fig.
24, 1*). The two posterior (below) polyps, situated in
the mesial line of the dorsal side, are 25""" long, and
5’""’ broad, and the tentacles are of the same length
as the body. The centro-dorsal polyps, are situated
at intervals of 1—2""" apart from each other (fig. 24. 1.
1). Alongside of these, to the left hand. 3 polyps appear,
situated in a slightly curved series (fig. 24. 2. 2. 2).
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