- Project Runeberg -  Den Norske Nordhavs-expedition 1876-1878 / The Norwegian North-Atlantic Expedition 1876-1878 / 6. Bind /
139

(1880-1901)
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af Legemet antager derfor Formen af en oval Skive.
Fortil danner Kroppen en kort, triangulær Pandedel, der
med hele sin Brede forbinder sig med Snabelen, og ved
en stærk Indknibning afgrændser sig fra det bagenfor
liggende, fodbærende Parti af Kroppen. Om nogen virkelig
Hals kan der imidlertid neppe være Tale. Halesegmentet
er skarpt afsat fra Kroppen og noget nedadbøiet. Det er
mere end halvt saa lang som Kroppen og særdeles smalt,
næsten cylindriskt, dog ganske lidt fortykket mod Enden,
som er stumpt tilrundet.

Snabelen (se Fig. 1, 1 a og lb) er af aldeles enorm
Størrelse, næsten dobbelt saa lang som det øvrige Legeme
og betydelig tykkere end dette i sit ydre Parti. Den
udgaar i horizontal Retning fra Enden af Pandedelen, men
viser en meget tydelig ventral Bøining (se Fig. 1 b). Af
Form er den næsten kølledannet, idet den successivt
udvides mod Enden, med den øvre Flade stærkt convex, den
nedre mere affladet. Enden er stumpt afkuttet og viser
3 afrundede Lapper, svarende til de 3 Længdesegmenter,
hvoraf den er sammensat. Af disse Lapper er den øverste
mest fremragende, og alle 3 begrændser i Midten den
trekantede Mundaabning. Denne sidste (se Fig. 1 c) dækkes
for en Del af 3 fra hvert af Længdesegmenterne indad
fremspringende triangulære Læber af membranøs
Beskaffenhed, hvis tilspidsede Ender næsten modes i Midten.

Øieknuden (se Fig. 1 b) har Formen af en lige
opad-rettet koniskt tilspidset Forhøining, uden Spor at Pigment
eller Synselementer.

Af Saxlemmer er ikke det mindste Rudiment at
opdage.

Folerne (se Fig. 1, 1 a og 1 b), der udspringer noget
ventralt fra den forreste Del af Pandepartiet, er af
betydelig Størrelse, idet de, lige udstrakte, næsten er af
Legemets Længde. Af Form er de smalt cylindriske, noget
S-formigt hoiede og kun besatte i sit yderste Parti med
yderst korte pigformige Haar. Leddene viser et lignende
indbyrdes Forhold som hos de til foregaaende Familie
hørende Former, idet de 2 første er meget korte og tykke,
3die og 5te stærkt forlængede, medens det mellem begge
liggende 4de Led er forholdsvis af ringe Størrelse. Af de
5 ydre Led er 2det længst, og de 3 sidste aftager
successivt i Størrelse.

De falske Fødder (se Fig. I a, 1 b) er fæstede tæt
bag Folerne og hver indleddede paa en fremspringende
Knude. De er stærkt, forlængede og tynde, selv betydelig
længere end det hele Legeme, og ialmindelighed stærkt
albueformigt bøiede. Antallet af Led er det samme som
paa Følerne, nemlig 10, hvoraf de 3 første som sædvanlig
er meget korte, 4de og 5te derimod stærkt forlængede,
især det sidste. De 4 yderste Led er ganske korte,
indbyrdes omtrent af ens Størrelse, og i Inderkanten
bevæbnede med flere Rækker af korte, sammentrykte Torner.

between them, and the central part of the body, therefore,
assumes the shape of an oval disc. Anteriorly the trunk
forms a short triangular frontal part, which is, in its
entire breadth, connected to the proboscis, and is marked
off by a strong constriction from the pediferous part of
the body situated behind. There can scarcely, however,
be any mention of a real neck. The caudal segment is
sharply defined from the trunk, and somewhat bent
downwards. It is more than half as long as the trunk and
particularly narrow, almost cylindrical, although slightly
tumeficated towards the extremity, which is bluntly
rounded.

The proboscis (see fig. 1. 1 a and 1 b) is of quite
an enormous size, almost twice as long as the rest of
the body, and considerably thicker than it in its outer
portion. It issues in a horizontal direction from the end
of the frontal part, but exhibits a very distinct ventral
curvature (see fig. 1 b). In shape it is almost claviform,
as it is gradually expanded towards the extremity, with
the upper surface strongly convex and the lower one more
flattened. The extremity is obtusely truncated, and exhibits
3 rounded lobes, corresponding to the 3 longitudinal
segments of which it is composed. Of those lobes the
uppermost one is the most prominent, and all the 3 border
in the middle the trigonal oral aperture. This last (see
fig. 1 c) is partially covered by 3 triangular lips of
membranous nature projecting inwards from each of the
longitudinal segments whose pointed extremities almost meet
each other in the centre.

The ocular tubercle (see fig. 1 b) has the form of a
conically pointed prominence, directed straightly upwards,
without trace of pigment or visual elements.

Not the least rudiment of chelifori can be
discovered.

The palpi (see fig. I, 1 a and 1 b), which issue
somewhat ventrally from the anterior part of the frontal
portion. are of considerable size, as they, straightly extended,
are almost the length of the body. In form they are
narrow cylindrical, somewhat S-formly bent, and’only in
their outermost part beset with extremely short, spiniform
sgtæ. The joints exhibit a similar mutual relation asTin
the forms pertaining to the preceding family, as the I
ones are very short and thick, the 3rd and 5th ’greatly
elongated, whilst the 4th joint, lying between them both,
is relatively of small size. Of the 5 outer joints the 2nd
is the longest, and the 3 last ones diminish successively
in size.

The false legs (see fig. I a. 1 b) are attached close
behind the palpi, and each is articulated to a prominent
nodule. They are greatly elongated and thin, even
considerably longer than the entire body, and usually strongly
bent in elbow-shape. The number of joints is the same
as in the palpi, namely 10, of which the 3 first ones are.
as usual, very short, the 4th and 5th. on the contrary,
greatly elongated, especially the last-named. The 4
outermost joints are quite short, about equal in size mutually,
and armed on the inner margin with several series of

18*

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