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4
Menipea jeffreysii, Norman.
Hincks, (8), p. 42, tab. 9, fig. 1 2.
Norman, (17, vol. 12). p. 44G, tab. 19, fig. 1.
Nordpaa rd. (18, I), p. 11, tab. 2. fig. 5.
Findesteder. St. 10, 18.
Arten cr tagen hist og hor langs Norges kyst fra
Bergen til Østfiniuarken; er forøvrigt kun kjendt fra
Shetland. .leg har i de to sidste aar fundet den flere gange i
fjordene ved Bergen. Alle de eksemplarer, jeg har seet,
har været forsynede med det eiendommelige kitinøse
støtteapparat.
Menipea jeffreysii, Norman.
Hincks (8), p. 42: Pl. IX, figs. 1, 2.
Norman (17, Vol. 12), p. 446; Pi. XIX, fig. 1.
Nordgaard (18, I), p. 11; PI. II. fig. 5.
Occurrence. St. 10, 18.
This species is found here and there along the coast
of Norway from Bergen to East Finmark. Otherwise it
is only known from the Shetland Isles. During the last
two years, 1 have found it several times in the fjords round
Bergen. All the specimens I have seen, have been
furnished with the peculiar, chitinous case.
Menipea normani, n. sp.*).
Tab. I, fig-. 2—8.
Findesteder. St. 81, 200, 323.
Jeg har vistnok ikke havt tilstrækkelig literatur til
at gjøre mig bekjendt med alle menipea-arter, som er
opført i Jelley’s katalog, men da jeg tror. det er overveiende
sandsynlighed for, at den Menipea, jeg har havt mellem
hænder, er ny og ubeskreven, vil jeg lier i korthed
karakterisere den.
Zoariet udspringer fra en enkelt stamme, som er
sammensat af kitintuber, og hvis nedre ende er fæstet til
en sniaasten eller lignende. Grenene er dikotomisk delte
og ligger ikke alle i samme plan. De er støttede af
kitintuber, som næsten udelukkende forløber efter bagsiden.
Zoöcierne er forlængede og ordnede i en dobbeltrække.
Mundingen oval og niundingsranden noget ophøiet. Ved
den distale rand sidder 3 5 børster eller pigger. Disse
kan paa de ytterste zoöeier i grenene have en længde af
0.8 1.0 mm.
Der er to slags avicularier. De laterale er ganske
smaa, og de sidder saa langt bagud, at de tildels ikke sees,
naar grenen ligger i frontstilling. Derimod rager
front-aviculariet, som er fæstet lige under den proximale
niun-dingsrand, langt frem over mundingen. Den lille mandibel,
som sidder i toppen, er rettet nedad. Oöciernes længde
er større end bredden, paa mange forekommer bugtede
fortykkelser i frontvæggen. Til operculum saaes ikke spor af
antydning. Kolonierne var ikke saa godt konserverede, at
noget sikkert kan siges om polypidet.
De oven omtalte kitintuber udspringer fra den nederste
del af zoöcierne, hvorefter de forløber efter zoöciernes
bagside for tilslut at samle sig i en enkelt stamme, som
saaledes bestaar af en bundt af kitinrør. I dette stykke er
der altsaa stor overensstemmelse mellem M. jeffreysii og
*) Opkaldt efter the Rev. Canon Norman, som har leveret store
bidrag til udforskningen af vor marine fauna.
Menipea normani, n. sp.*).
PL I, tigs. 2—S.
Occurrence. St. 31. 200, 323.
My knowledge of the literature on this subject is not
sufficient to have made me acquainted with all the Menipea
species that appear in Jelley’s catalogue; but as I think
there is every probability that the Menipea I have had in
my hands is new and hitherto undescribed. I will here
briefly characterise it.
The zoarium springs from a single stem which is
composed of chitinous tubes, and whose lower end is
attached to a small stone or something similar. The branches
are dichotonious, and do not all lie in the same plane.
They are supported by chitinous tubes, which run almost
exclusively along the posterior side. The zooecia are
elongated, and arranged in a double row. The mouth is oval,
and its edges somewhat elevated. On the distal margin
there are from 3 to 5 bristles or spines. On the
outermost zooecia in the branch, these may be from 0.8 to 1 mm.
in length.
There are two kinds of avicularia. The lateral are
quite small, and are placed so far back that they
sometimes cannot be seen when tin’ branch is viewed from the
front. The front avicularium, on the other hand, which
is attached just below the proximal margin of the aperture,
extends far over the aperture. The little mandible, which
is situated at the top, is directed downwards. The length
of the oæcia is greater than their breadth; in many there
are curved expansions of the anterior wall. There is no
sign of any operculum. The colonies were not in sucli a
good state of preservation as to allow of anything certain
being said about the polypides.
The above-mentioned chitinous tubes spring from the
lowest part of the zooecia, and then run along their
posterior side, to unite at last in a single stem, which thus
consists of a bundle of chitinous tubes. In this respect
therefore, there is a great similarity between M. jeffreysii
*) Named after the Kev. Dr. Norman, who has made large
contributions to the knowledge of our marine fauna.
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