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83
stærkt forlænget, næsten dobbelt saa langt som Laarleddet
og omtrent ’/ä længere end det terminale Afsnit.
Tarsalleddet (se Fig. 2 i) er af lineær Fonn og betydelig længere
end Fodleddet, der er kjendelig smalere og i Inderkanten
besat med en Rad af meget smaa Torner, mellem hvilke
der findes fine Haar (se Fig. 2 k). Endekloen er
ualmindelig kort, neppe halvt saa lang som Fodleddet, men meget
stan’k. sammentrykt og endende i en skarp Spids. Bikløerne
er af middelmaadig Størrelse, næsten 1/.i saa lange som
Endekloen.
De ydre Ægmasser (se Fig. 2) er temmelig store,
kugleformige, og indeholder talrige yderst smaa Æg. Ofte
er de tilstede i dobbelt Antal paa enhver af de falske Fødder.
Farven er i levende Tilstand mere eller mindre intenst
gulrod, navnlig mod Enden af Leddene paa Fodderne.
Forekomst. Dette er uden Sammenligning den ved
vor Syd- og Vestkyst almindeligste Pycnogonide og
forekommer otte i store Mængder paa maadeligt Dyb, fra 10 til
50 Favne. Det nordligste, jeg har truffet den er ved
Lofoten. Ved Finmarken synes den derimod at erstattes
af følgende Art,
Udbredning. Foruden ved Norge er Arten kun med
Sikkerhed observeret ved England (Goodsir) og Østkysten
af Nordamerika (Wilson); thi Angivelserne af dens
Forekomst i de arktiske Have beror ganske sikkert paa en
Forvexling med følgende Art. At domme efter dens
Forekomst ved vore Kyster, synes den at være en mere sydlig
(boreal) Form.
25. Nymphon gracilipes, Heller.
(PI. VIII, Fig. :), a—g)..
Nymphon gracilipes, Heller, Crust. Pycnog. & Tunic, d.
Østerr. Ung. Nordpol Exped. p. 40, Tab. IV. Fig. 15,
Tab. V, Fig. 1—2.
Nymphon Strømii, Hoek, Nieder! Archiv f. Zool. Supplem.
1, p. 9. PI. 1, fig. 9—16 (non Krøyer).
Hansen, Kara Havets Pycnogonider,
p. 9, Tab. XVIII, Fig. 3 (non Krøyer).
Nymphon gracilipes, G. O. Sars, Pycnogonidea borealia &
arctica, No. 25.
Artscharacter. Ydre Habitus meget lig samme hos
foregaaende Art. Hovedsegmentet betydelig længere end
de 3 følgende Segmenter tilsammen, Pandedelen endnu
bredere end hos N. Strømii. Øieknuden lav. stumpt
af-kuttet i Enden. Snabelen af Hovedsegmentets Længde,
noget afsmalnende. Saxlemmerne forholdsvis større og
kraftigere end hos foregaaende Art, Haanden betydelig
længere end Skaftet, stærkt buet, Fingrene længere end
Palmen. Spidsen af den bevægelige næsten ret, af den
joint is appreciably longer than the femoral one and the
2nd joint is remarkably elongated, well-nigh twice as long
as the femoral joint and about one-fourth longer than the
terminal section. The tarsal joint (see fig. 2 i) is linear in
form and considerably longer than the propodal joint, which
is appreciably slenderer and beset on the inner edge with
a series of very small spines with fine hairs between them
(see fig. 2 k). The terminal claw is uncommonly short, hardly
half as long as the propodal joint, but very strong,
compressed, and terminating in a sharp point. The auxiliary
claws are of moderate size, almost one-third longer than
the terminal claw.
The outer egg-masses (see fig. 2) are rather large,
globular in shape, and contain numerous, exceedingly small ova.
They often occur in double numbers on each of the false legs.
The colour in the living state, is a more or less
intense yellowish-red, particularly towards the end of the
joints of the legs.
Occurrence. This is beyond comparison the Pycnogonid
most commonly met with on the south and west coasts of
Norway, and often occurs in great abundance at moderate
depths, from 10 to 50 fathoms. The farthest north that I have
taken it is off Lofoten. On the Finmark coast it appears, on
the other hand, to be replaced by the following species.
Distribution. Besides off Norway, England (Goodsir)
and the east coast of North America (Wilson) are the
only places where the species has with certainty been
observed; as the statements of its occurrence in the Arctic
seas rest quite assuredly on a confusion of the animal with
the following species. To judge from its occurrence off the
coasts of this country, it would seem to be a more southern
(boreal) form.
25. Nymphon gracilipes. Heller.
(Pl. VIII, fig. 3, a—g).
Nymphon gracilipes, Heller, Crust. Pycnog. & Tunic, d.
Østerr. Ung. Nordpol Exped. p. 40, Tab. IV. fig. 15,
Tab. V, fig. 1, 2.
Nymphon Strömii. Hoek. Nieder! Archiv f. Zoo! Supplem.
1, p. 9; PI. 1, fig. 9—16 (non Kröyer).
— Hansen, Kara Havets Pycnogonider, p. 9,
Tab. XVIII, fig. 3 (non Kröyer).
Nymphon gracilipes. G. O. Sars, Pycnogonidea borealia Å
arctica, No. 25.
Specific Characters. Outer habitus much the same
as in the preceding species. Cephalic segment considerably
longer than the 3 following segments taken together, frontal
part still broader than in N. Strimiii. Oculiferous tubercle low.
obtusely truncated at the extremity. Proboscis same length
as the cephalic segment, somewhat tapering. Chelifori
relatively larger and more powerful than in the preceding species,
hand considerably longer than the scape, exceedingly arcuate,
fingers longer than the palm, the point of the mobile one
il*
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