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132
Haar, hvorimod egentlige Randtorner mangler. Endekloen
er forholdsvis kort. neppe mere end ’/s saa lanS soln
Fodleddet, og uden Spor af Bikloer.
De ydre Ægmasser (se Fig. 1 b), der ialmindelighed
er fæstede til de falske Fodders 4de Led, er uregelmæssig
kugledannede og indeholder et begrændset Antal af
middelstore Æg, omgivne af en fælles tynd Membran.
Legemets Farve er mere eller mindre tydelig gulagtig,
med mørkebrunt gjenneiuskinnende Tarmsystem. Men
somoftest er Dyret saa tæt besat med Mudder og andre
fremmede Dele, at Farven er meget vanskelig at erkjende.
Forekomst. Jeg har observeret denne
eiendommelige Pycnogonide ganske enkeltvis paa forskjellige Punkter
af vor Kyst, nemlig ved Christiansund, ved Valdersund
nordenom Trondhjemsfjorden, og ved Kvalo paa
Nordlands-kysten; Dybden 50—100 Favne. Under Nordhavs
Expeditionen toges et enkelt Exemplar i Havet mellem Finmarken
og Beeren Eiland (Ståt. 290) paa et Dyb af 191 Favne.
Desuden har jeg havt Anledning til at undersøge et enkelt
Exemplar, taget under Nordenskjölds Expedition i det
Kariske Hav.
Udbredning. Arten er forst af Kröyer beskreven
fra Grønland og senere af Jarzynsky anført fra den
murmanske Kyst, samt af Dr. Hansen fra det Kariske Hav.
Den maa ifølge denne sin Forekomst utvivlsomt ansees for
en ægte arktisk Form.
quite faintly bent, and a little tumeficated in its basal
part. Both joints are closely beset with short hairs, whilst,
on the other hand, real marginal spines are absent. The
terminal claw is relatively short, scarcely more than ’/ä
as long as the propodal joint, and without trace of
auxiliary claws.
The outer egg-masses (see fig. 1 b), which are usually
secured to the 4th joint of the false legs, are irregularly
globular in form, and contain a limited number of
medium-sized ova enveloped in a thin common membrane.
The colour of the body is more or less distinct
yellowish, with dark brown, transparent intestinal system.
But most commonly the animal" is so densely covered
with mud and other foreign substances that the colour is
very difficult to detect.
Occurrence. I have observed this peculiar
Pycnogonid quite occasionally, at 3 different places on the
Norwegian coast viz. at ’Christianssund, at Valdersund north
of the Trondhjem Fiord, and at Kvalö on the coast
of Nordland; ’depth 50—100 fathoms. On the North
Atlantic Expedition a single specimen was taken in the
ocean between Finmark and Beeren Island (Ståt. 290) at
a depth of 191 fathoms. I have had an opportunity,
besides, of examining a single specimen taken in the Kara
Sea, on Nordenskjölds Expedition.
Distribution. The species is first described by Kröyer
from Greenland, and subsequently recorded by Jarzynsky
from the Murman Coast, also by Dr. Hansen from the
Kara Sea. It must, according to that occurrence, be
indubitably regarded as a genuine Arctic form.
Gen. 13. Ascorhynchus, G. O. Sars. 18713.
Slægtcharacter. Legemet smalt og forlænget, med
skarpt afsatte Segmenter og vidt adskilte Sidefortsatser.
Hovedsegmentet med forlænget Hals og kølleformigt udvidet
Pandedel; Halsfortsatserne utydelige. Halesegmentet
særdeles smalt, cylindriskt. Øieknuden af forskjellig Fonn,
ialmindelighed uden Synselementer. Snabelen af betydelig
Størrelse, næsten pæreformig og mere eller mindre
ind-boiet under Legemet, Skaftet meget kort. Saxlemmerne
særdeles smaa, Skaftet 1-leddet (eller 2-leddet), Haanden
hos fuldvoxne Individer rudimentær, af triangulær Fonn.
Følerne stærkt forlængede, af en lignende Bygning som
hos foregaaende Slægt. De falske Fødder 10-leddede,
Endedelens lste Led stærkt forlænget, Randtornerne i
tiere Rækker, saugtakkede. Gangfodderne af
middelmaadig Længde, meget spinkle, fint haarede eller glatte,
2det Hofteled hos Hunnen stærkt opblæst, Laarleddet
hos Hannen med en afrundet Knude ved Basis,
Tarsalleddet kort eller maadeligt forlænget, Fodleddet lineært,
ikke krummet, Endekloen forlænget, uden Bikløer. De
ydre Ægmasser forholdsvis smaa, Æggene faa og af be-
Gen. 13. Ascorhynchus, G. O. Sars. 1876.
Generic Characters. Body narrow and elongated,
with sharply defined segments and widely separated lateral
processes. Cephalic segment with elongated neck and
claviformly expanded frontal part; the cervical processes
indistinct. Caudal segment particularly narrow,
cylindrical. Ocular tubercle of variable form, usually
without visual elements. Proboscis of considerable size,
almost piriform, and more or less folded in under the
body, scape very short. Chelifori particularly small, scape
single-jointed (or 2-jointed), hand in full-grown individuals,
rudimentary, triangular in form. Palpi greatly elongated,
of similar structure as in the preceding genus. False legs
10-jointed, 1st joint of the terminal part greatly elongated,
marginal spines in several series, serrated. Ambulatory
legs of medium length, very slender, finely setous or smooth,
2nd coxal joint in female, greatly expanded, femoral joint
in male with a rounded nodule at the base, tarsal joint
short, or only slightly elongated, propodal joint linear, not
bent, terminal claw elongated, without auxiliary claws.
The: outer egg-masses relatively small, the ova few in
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