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De 3 {Agre Fodpar er noget mindre kraftigt udviklede
end hos foregaaende Art, forøvrigt af den sædvanlige
Bygning.
Den rudimentære Bagkrop (se Fig. 4 g~li) danner
kun et yderst lidet knudeformigt Fremspring ved Enden af
sidste Kropssegment mellem Roden af sidste Fodpar. Ved
nøiere Undersøgelse viser dette sig at bestaa ligesom af 3
Valvler, en dorsal og 2 ventrale. Disse indeslutter mellem
sig Endeafsnittet af Tarmen, der munder paa Spidsen med
en trekantet Aabning. Paa den nedre Side af de ventrale
Valvler sees 2 smaa knudeformige Fortsatser, der forestiller
Rudimenter af et Par Lemmer.
Hannen (Fig. 4 x) er betydelig større end Hunnen
og af mere langstrakt Kropsform. Navnlig er de 2 forreste
Segmenter kjendelig stærkere forlængede. Legemets
Bevæbning er derimod lidet afvigende, skjøndt Piggene
idethele synes noget mindre fremtrædende.
lste Par Følere er betydelig stærkere forlængede end
hos Hunnen og mere end dobbelt saa lange som 2det Par.
Skaftets 2 ydre Led er indbyrdes næsten af ens Størrelse
og Svøben neppe halvt saa lang som Skaftet.
2det Fodpar, der ligesom hos Hannen af foregaaende
Art udspringer fra den bagre Del af 2det Segment, er
temmelig uligt samme hos Hunnen. Haanden er særdeles
stor og af aflang Fonn samt i begge Kanter tæt besat med
fine Ciber. Griberanden viser i Midten 2 dybe Indsnit
begrændsede af 2 triangulære Fortsatser, hvoraf navnlig
den forreste er meget stor. Foran det forreste og dybeste
Indsnit og lige under Endekloens Insertion gaar Haanden
ud i 2 spidse Hjørner.
Bagkroppen (Fig. 4 k—l) er forholdsvis noget mindre
rudimentær end hos Hunnen, og de 2 knudeformige
Appendices paa den nedre Side er her udviklede til et Par
tydelige 2-leddede og tæt børstebesatte Lemmer. Umiddelbart
foran Bagkroppen udgaar fra sidste Kropssegments Bugside
2 koniske Fortsatser, som forestiller de vdre Kjonsvedhæng.
Farven er hos begge Kjøn ensformig graahvid, uden
nogen tydelig Pigmentering,
Længden af den ægbærende Hun er 14""". Hannen
opnaar en Længde af indtil 20m™.
Forekomst og Udbredning. Denne cbaracteristiske
Art er under Expeditionen observeret paa ikke mindre end
6 forskjellige Stationer, alle tilhørende den kolde Area;
Dybden fra 350 til 743 Favne. Paa enkelte af disse
Stationer forekom den i store Mængder. Det sydligste Punkt,
hvor den er bleven observeret er i Færø-Shetlands-Renden,
paa hvilken Lokalitet den først blev opdaget under den
engelske Lightning-Expedition, det nordligste Punkt (Ståt.
343) ligger i Havet Vest af Spitsbergens Sydpynt.
The 3 posterior pairs of legs are somewhat less
powerfully developed than is the case with those in the
preceding species; for the rest, of the usual structure.
The rudimentary abdominal division of the body (fig.
4 g—h) forms but an exceedingly small tuberculiform
projection, at the extremity of the last body-segment, between
the bases of the last pair of legs. Oil closer examination,
this projection is found to consist, as it were, of 3 valves,
one dorsal and 2 ventral. These valves enclose the terminal
section of the intestine, which opens at the extremity with
a triangled orifice. On the lower surface of the ventral
valves, are seen 2 small, tuberculiform prolations, that
represent the rudiments of one or two limbs.
The Male (fig. 4 x) is considerably larger than the
female, and exhibits a more elongate fonn of body. The
2 foremost segments are in particular appreciably more
produced. On the other hand, the armature of the body
deviates but little, though the spikes would, on the whole,
appear to be less prominently developed.
The 1st pair of antennæ are much more elongate
than in the female, and upwards of double the length of
the 2nd pair; the 2 outer joints of the peduncle occur
almost equal in length, and the flagellum is scarcely half as
long as the peduncle.
The 2nd pair of legs, which, as in the male of the
preceding species, issue from the posterior part of the 2nd
segment, differ considerably from those in the female. The
hand is exceedingly large, oblong in form, and delicately
ciliate along both margins. The palmar margin exhibits
ill the middle 2 deep incisions, bounded by 2 triangular
projections, of which the foremost in particular is very
large. Anterior to the foremost and deepest incison, and
immediately beneath the origin of the terminal claw, the
hand juts forth as 2 sharp corners.
The posterior division of the body (fig. 4 k—I) is, by
comparison, somewhat less rudimentary than ill the female,
and the 2 tuberculiform appendages on the lower side are
developed as a pair of distinct two-jointed and densely
bristle-beset limbs. Immediately anterior to the posterior
division of the body, proceed from the ventral surface of
the last body-segment 2 conical prolations. that represent
the outer generative appendages.
Colour in both sexes a uniform greyish-white,
without distinct pigmentation.
Length of tile ovigerous female 14"’™. The male
attains a length of 20""".
Occurrence and Distribution. — Tilis characteristic
species was taken on the Expedition at as many as 6
different Stations, all belonging to the cold area. Depth
ranging from 350 to 743 fathoms. At several of these
Stations the animal occurred in great abundance. The
most southerly point at which it has hitherto been observed
is the Færø-Shetland channel, the locality where the form
was first met with (on the English "Lightning" Expedition);
the most northerly point (Ståt. 343) lay some distance west
of the southern extremity of Spitzbergen.
•29»
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