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gelen ligge de paa hinanden og danne tildels større eller
mindre Bundter.
Polyperne ere cylindriske, vandklare, saa at man
gjennem Kroppen kan se Skillevæggene; de ere imellem
3 -4""" lange. Tentaklerne ere Ijederl’ormede. mindst
dobbelt saa lange som Kroppen, og paa den aborale Flade
forsynede med en Midtrække af vandklare, trekantede, i
begge Ender noget tilspidsede Spikier, der ere 0.1 ’<{)""" lange.
0.014""" brede og gaa fra Tentakelens Grund til dens
Spids.
Mundskiven er lidt hvælvet, og i dens Midte sees den
aflange Mundaabning. der forer ind til det lange, paa sin
indvendige Flade stærkt foldede Svælg. Fra dettes nederste
fri. runde og noget tykke Kand udgaa 8 Gastvalfilamenter.
hvorat to ere længere end de øvrige. Langt nede i
Ga-stralhulheden udvikle Generationsorganerne sig paa Septula;
de danne stilkede Kapsler, hvori hos Hunnen udvikler sig
i Hege len kun 1 Æg. Protoptileskegten har efter alt at
dømme særskilt Kjøn. idetmindste forholder det sig saa
hos de Arter, vi have havt Anledning til at undersøge og
beskrive.
Zooiderne adskille sig ikke fra dem, der tindes hos
Brot opt. lofotense, naar undtages, at Munden er aflang,
imedens den hos Protopt. lofotense viste sig at være rund.
hvilket forresten kan være Følgen af en stærkere
sammen-trukken Tilstand. De ere ligesom hos Protopt. lofotense
omgivne krandsformigt af trekantede Spikier, der ere noget
afstumpede i den nederste Ende. imedens den øverste er
meget tilspidset; de største ere 0,536""" lange, 0,054"""
brede.
Sarcosomaet er temmelig tyndt, og i det ydre
Bindevæv er sammenpakket en Mængde vandklare, trekantede
Spikier lig dem, som tindes i Cellerne, og som med Hensyn
til Fonn ikke afvige fra dem. der ere afbildede paa PI. 11,
Fig. 17; men i den før beskrevne Kjøl langs Ventralfladens
Midte tindes ikke Kalkspikler, hvilket er Tilfældet hos de
to foregaaende Arter.
Farven.
Hachis er bleggul; Cellerne ere næsten hvide;
Polypornes Krop vandklar; Tentaklerne som Cellerne.
Findested.
Station 255.
at the inferior extremity of the cell, in the form of a
truncated cone; whilst, superiorly, they pass over in a
pyramidal form into the teeth. They are, as a rule, placed upon
each other, and form, partly, larger or smaller bundles.
The polyps are cylindrical, and clear as water, so
that, the dividing walls become visible through the body:
and, they measure between 3—4""" in length. The
tentacles are leather-shaped, and are at least twice as long as
the body. On the abor.il surface, they are furnished with
a mesial series ol’ spicules, which are clear as water,
triangular in shape, and acuminated at both extremities.
They measure 0.13()""" long, 0.014""" broad, and extend
from the base of the tentacle to its point.
The oral disk is a little arched, and in its middle,
the oblong oral aperture which leads into the (on its
interior surface strongly folded) gullet, is seen. From the
inferior, free, round, and somewhat thick margin of the
gullet, 8 gastral filaments proceed, of which, two are longer
than the others. Far down in the gastral cavity, the
generative organs develope themselves on the septula. They
fonn pedunculated capsules, in which, in tlve case of the
female, there is. usually, only one ovum developed. The
Protoptilum genus has to all appearance, separated sexes; at
all events, this has been the case with the species which we
have had an opportunity of examining and describing.
The zooids do not differ from those which are found
in Protopt. lofotense, with the exception that, the oral
aperture is oblong, whilst, in Protopt. lofotense, this was
shown to be round; hut that, however, may be the
consequence of a more strongly contracted condition. Like
those of Protopt. lofotense. they are surrounded in wreath
form, by triangular spicules, which are somewhat blunted
at the inferior extremity, whilst, the superior extremity is
very acuminate. The largest ol’ these" zooids measures,
0.53(5""" long, and 0.054""" broad.
The sarcosoma is rather thin, and in the external
connective-tissue there is. compactly crowded, a multitude of
triangular spicules, clear as water, like those found in
the cells; these, in regard to form, do not differ from
those which are illustrated in Pl. II. fig. 17; but, in the
keel already described as situated along the mesial line of
the ventral surface, no spicules are found, whilst, the case
is the opposite in the preceding species.
Colour.
The rachis is pale-yellow. The cells are nearly white.
The body of the polyps is as clear as water. The tentacles
are like the cells in colour.
Habitat.
Station JSo. 255.
Artskarakter.
llachis 215""" lang. Dorsalsiden hvælvet med en
smal. dyb Midtfure; paa liver Side af denne Cellerækker,
der staa langt fra hinanden og gaa paaskraas opad fra
Dorsal mod Yentralsiden. 1 liver Bække 3 Celler, som ere
Specific character.
The rachis is 215’""’ long. The dorsal side is arched,
and has a narrow, deep, mesial furrow; on each side
of this furrow, there are series of cells, placed far apart
from each other, and extending, diagonally, from the dorsal,
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