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42. Colossendeis proboscidea (Sab.)
(PL XV, Fig. a—(1).
Phoxichilus probosädeus, Sabine, Suppl. to the Append, of
Capt. Parry’s Voyage, p. CCXXVI.
Colossendeis borealis, Jarzynsky, Præm. Gat. Pycnogon.,
Ann. de la Société des Naturalistes de St. Petersbourg.
Colossendeis proboscidea, G. O. Sars, Prodrom. descript.
Crust, et Pyenog., etc. p. 368.
Anomorhyncltus Smithii, Miers, Ann. Mag. Nat. Hist. 1881,
p. 50, Pl. VII. Pig. 6-8.
Colossendeis proboscidea, Hoek, Pyenog. Wil Brarents, 1. c.
p. 22, Pl. II, Pig. 41—42. ’
Colossendeis gigantea, Struxbsrg, Vega-Expeditionens vetensk.
iakttagelser, Bd. I, p. 708.
Colossendeis proboscidea, Hansen, Karahavets Pycnogonider,
p. 20.
G. O. Sars, Pycnogonidea borealia
& arctica, No. 42.
Artscharacter. Kroppen kort og undersætsig, aflang
oval, bredest paa Midten, med tæt sammentrængte
Side-fortsatser. Pandedelen triangulær, neppe bredere end
Kroppen paa Midten. Halesegmentet meget smalt,
cylin-driskt, nedadkrummet. Snabelen af enorm Størrelse, mere
end dobbelt saa lang og i sit ydre Parti næsten dobbelt
saa tyk som Kroppen, noget buet og successivt udvidet
mod Enden, næsten kølleformig. Øieknuden lige
opadrettet, konisk tilspidset. Følernes 3 ydre Led successivt
aftagende i Størrelse og tilsammen længere end 7de Led.
De falske Fodder, lige udstrakte, længere end Legemet,
4de Led kortere end 6te. Gangfødderne forholdsvis robuste,
omtrent dobbelt saa lange som Legemet, Tarsalleddet
betydelig længere og tykkere end Fodleddet, Endekloen
kortere end dette sidste Led. Farven gulrød. Legemets
Længde 50""". Spandvidde 225""".
Bemærkninger. Denne gigantiske Fonn, der danner
Typen for ’Slægten, skiller sig fra alle de øvrige bekjendte
Arter ved den ualmindelig korte og sammentrængte
Kropsform og ved Snabelens excessive Størrelse og eiendommelige
kølledannede Fonn. Ogsaa hvad Fødderne angaar har den
et ubetinget mere robust Præg end de øvrige Arter.
Beskrivelse. Det foreliggende Exemplar, der synes
at være en fuldt udviklet Hun, har en Længde fra Spidsen
af Snabelen til Enden af Halesegmentet af fulde 50™"’, og
en Spandvidde mellem de udstrakte Gangfødder af ikke
mindre end 225’"™. Den er saaledes ubetinget den største
af alle vore nordiske Pycnogonideer.
Formen maa (se PI. XV, Fig. 1) idetheletaget siges
at være temmelig robust, navnlig hvad selve Kroppen
angaar. Denne sidste er (se ogsaa Fig.’ 1 a, 1 b) af aflang
Fonn, med jevnt convex Rygside og noget affladet
Bugside, samt uden det mindste Spor af nogen Segmentation.
Sidefortsatserne, der er kortere end Kroppens Brede paa
Midten, er saa tæt sammentrængte, at der knapt er nogen
bemærkelige Mellemrum mellem dem. og den centrale Del
42. Colossendeis proboscidea (Sab.)
(PI. XV, fig. 1, a—d).
Phoxichilus proboscideus, Sabine, Suppl. to the Append, of
Capt. Parry’s Voyage, p. CCXXVI.
Colossendeis borealis, Jarzynsky, Præm. Cat. Pycnogon.
Ann. de la Société des Naturalistes de St. Petersbourg.
Colossendeis proboscidea, G. O. Sars, Prodrom. descript.
Crust, et Pycnogon. &c. p. 368.
Anomorhynchus Smithii, Miers, Ann. Mag. Nat. Hist. 1881.
p. 50, Pl. VII, figs. 6—8.
Colossendeis proboscidea, Hoek, Pyenog. Wil. Brarents, 1. c.
p. 22, Pl. II, figs. 41—42.
Colossendeis gigantea, Stuxberg, Vega-Expeditionens Vetensk.
iakttagelser. Bd. 1, p. 708.
Colossendeis proboscidea, Hansen, Karahavets Pycnogonider,
p. 20.
— — G. O. Sars, Pycnogonidea borealia
& arctica, No. 42.
Specific Characters. Trunk short aud stout,
oblongo-oval, broadest at the middle, with closely crowded lateral
processes. Frontal part triangular, scarcely broader than
the trunk at the middle. Caudal segment very narrow
cylindrical, bent downwards. Proboscis of enormous size,
more than twice as long and in its outer part almost
twice as thick as the trunk, somewhat arcuate, gradually
expanded towards the extremity, almost claviform. Ocular
tubercle directed straight upwards, conically pointed. The
3 outer Jjoints of the palpi diminishing successively in
size, and together longer than the 7th joint. False legs,
straightly extended, longer than the body, 4th joint shorter
than the 6th one. Ambulatory legs relatively robust, about
twice as long as the body, tarsal joint considerably longer
and thicker than the propodal joint, terminal claw shorter
than that last-named joint. Colour yellow-red. Length of
the body 50"™. Extent 225"’™.
Remarks. This gigantic form, which forms the type
of the genus, distinguishes itself from all the other known
species, by its uncommonly short and compact trunk, and
by the excessive size of the proboscis and its peculiar
clavate form. Also in respect of the legs it has a
distinctly more robust character than the other species.
Description. The specimen before us, which appears
to be a fully developed female, has a length from the
point of the proboscis to the extremity of the caudal
segment, of quite 50™"’ and an extent between the extended
ambulatory legs, of not less than 225™". It is, thus,
indubitably the largest of all our northern Pycnogonids.
The form (see Pl. XV, fig. 1) must be said to be,
on the whole, pretty robust, especially as regards the
trunk. This last is (see also figs. 1 a, 1 b) oblongo-oval
in form, with an even convex dorsal side and somewhat
flattened ventral side, and without the least trace of
segmentation. The lateral processes, which are shorter than
the breadth of the trunk at the middle, are so closely
crowded, that there is scarcely any noticeable interval
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