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Gangfødderne (se Fig. 2) er spinkle og forlængede,
omtrent 5 Gange længere end Legemet, og besatte med
korte, spredte Haar. 2det Hofteled er over dobbelt saa
langt som de 2 øvrige tilsammen, Laarleddet omtrent 1/3
længere end Hoftepartiet og temmelig opsvulmet bos Hunnen,
lste Lægled er kjendelig længere end Laarleddet, og 2det
do., som sædvanlig, det længste, meget tyndt og noget
af-sinalnende mod Enden. Det terminale Parti af Foden er
stærkere udviklet hos denne Art end hos de fleste øvrige
og omtrent halvt saa langt som 2det Lægled.
Tarsalleddet (se Fig. 2 g) er af lineær Fonn og adskilligt længere
end Fodleddet. Dette sidste afsmalnes successivt noget
mod Enden og er i Inderkanten besat med tynde, næsten
børsteformige Torner, hvoraf de 4—5 inderste pleier at
være længst Endekloen er særdeles stærkt forlænget,
næsten af Fodleddets Længde, leformigt krummet ved
Basis og ender i en sylskarp Spids. Bikløerne er derimod
overordentlig smaa, neppe mere end ’/i» saa lange som
Endekloen.
De ydre Ægmasser (se Fig. 2 b) er forholdsvis ikke
synderlig store, uregelmæssigt kugleformige, hvorimod de
i deiu indeholdte Æg er større end sædvanligt. De er
sædvanligvis fæstede omkring 4de Led af de falske Fødder,
dog ikke sjelden til 5te Led; i enkelte Tilfælde er de
tilstede i dobbelt Antal paa hver af disse Lemmer.
Forekomst. Et enkelt Exemplar af denne Art blev
under Nordli. Expeditionens sidste Togt taget omtrent
midtveis mellem Finmarken og Beeren Eiland (Stat. 290)
paa 191 F\ D. Jeg har imidlertid havt Anledning til at
undersøge en hel Del Exemplarer af samme Art.,
indsamlede under Nordenskjølds Expedition 1875 paa forskjellige
Punkter i det kariske Hav; Dybden fra 20 til 60 F’avne.
Udbredning. Arten er først beskeven af Hoek fra
Barents Søen efter et enkelt mindre vel conserveret
Exemplar og er senere af Dr. Hansen anført fra det kariske
Hav. Andetsteds er den ikke bleven observeret; men de
ovenanførte Lokaliteter er nok til at stemple den som en
ægte arktisk Fonn.
22 Nymphon longitarse. Krøyer.
(PI. VII, Fig. 3, a-h).
Nymphon longitarse. Krøyer, Nat. Tidsskr. N. R. Bd. 1,
p. 112. ’
Idem, Gaimard’s Voyage en
Scan-dinavie, PL 36, fig. 2, a—f.
Wilson, Trans. Conn. Acad. Vol. V,
p. 19, PL VII. fig. 2, a—li.
— Idem, United States Commission of
Fish and Fisheries, Report f. 1878, p. 489, Pl. VI,
fig. 30-31.
The ambulatory legs (see fig. 2) are slender and
elongated, about 5 times longer than the body, and beset
with short, scattered hairs. The 2nd coxal joint is more
than twice as long as the 2 other ones taken together; the
femoral joint is about ’/3 longer than the coxal part, and
is rather swollen in the female. The 1st tibial joint is
appreciably longer than the femoral one, and the 2nd is, as
usual, the longest, very slender, and tapers somewhat towards
the extremity. The terminal part of the leg is more fully
developed in this than in most of the other species, and
is about half the length of the the 2nd tibial joint. The
tarsal joint (see fig. 5 g) is linear in form and considerably
longer than the propodal joint. The latter joint diminishes
successively, somewhat, towards the end, and is beset on the
inner edge with delicate, well-nigh setiform spines, of which
the 4 or 5 innermost are usually the longest. The terminal
claw is particularly elongated, almost the length of the
propodal joint, falciformly arcuate at the base, and
terminates in a point as sharp as an awl. The auxiliary claws,
on the other hand, are remarkably small, scarcely more
than ’/io °f the length of the terminal claw.
The outer egg-masses (see fig. 2 b) are, relatively, not
very large, irregularly globular in form, whereas the ova
they contain are larger than usual. They are generally
adherent round the 4th joint of the false legs, not
infrequently, however, to the 5th joint; in some cases they
are present in double numbers on each of those limbs.
Occurrence. A single specimen of this species was
taken on the last cruise of the North Atlantic Expedition,
about midway between Finmark and Beeren Eiland (Ståt.
290), at a depth of 191 fathoms. I have however, had the
opportunity of examining a great many specimens of the
same species collected on Nordenskjöld’s Expedition in 1875,
from various localities in the Kara Sea; depth 20 to 60
fathoms.
Distribution. The species has been first described by
Hoek, from a single, not very well preserved, specimen taken
in Barent’s Sea, and it has since been recorded by Dr. Hansen
from the Kara Sea. It has not been observed elsewhere,
but the localities given above suffice to establish it as a
true Arctic form.
22. Nymphon longitarse. Krøyer.
(Pl. VII, fig. 3, a—h).
Nymphon longitarse, Krøyer, Nat. Tidsskr. N. R. Bd. 1.
p. 112.
— Kröyer, Gaimard’s Voyage en
Scan-dinavie, PL 36, fig. 2, a-f.
— — Wilson, Trans. Conn. Acad. Vol. V,
p. 19, PL VII. fig. 2, a—li.
— Idem, United States Commission of
Fish and Fisheries, Report for 1878, p. 489, Pl. VI,
fig. 30—31.
10*
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