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109
Hannen er dette Led (se Fig. 3 i) som sædvanlig betydelig
smalere og har i den indre Kant 4—5 afrundede Knuder.
2det Lægled er meget smalt, næsten lineært, og omtrent
2’/ä Gang længere end det terminale Afsnit. Dette sidste
(se Fig. 3 h) skiller sig kjendeligt fra samme hos de 2
foregaaende Arter og er idethele betydelig spinklere.
Tarsalleddet er mere end dobbelt saa lang* som bredt og kun
ganske svagt udvidet mod Enden. Fodleddet er stærkt
forlænget, omtrent 21/« Gang længere end Tarsalleddet,
meget smalt, lineært, og langs Inderkanten bevæbnet med
en Rad af 12—16 temmelig ulige udviklede Torner.
Ende-kloen er noget mere end halvt saa lang som Fodleddet og
stærkt krummet ved Basis. Bikloerne er, i Modsætning
til hvad Tilfældet er hos den typiske Art, vel udviklede
og næsten af Kloens halve Længde
De ydre Ægmasser (se Fig. 3 b) er forholdsvis mindre
end hos foregaaende Art, kugleformige, og indeholder et
forholdsvis ringe Antal ualmindelig store Æg.
Dyrets Farve er blegt gulagtig, med brunlig
gjennem-skiunende Tarmsystem.
Forekomst. Jeg har taget denne Art af og til ved
vor Vestkyst, fra Hoiden af Stavanger til Tjøtø i
Nordland. Ved Finmarken har jeg derimod ikke observeret
den, og heller ikke under Nordhavs-Expeditionen erholdtes
denne Art.
Udbredning. Foruden ved Norges Kyster er den
alene med Sikkerhed kjendt fra de Britiske Øer (Goodsir).
Den har saaledes utvivlsomt en mere sydlig Udbredning
end de øvrige Arter af Slægten.
35. Chætonymphon tenellum, G. O Sars. •
(PI. XII, Fig. 1, a—h).
Chætonymphon tenellum, G. O. Sars, Pycnogonidea borealia
& arctica, No. 35.
Artscharacter. Legemet forholdsvis betydelig spinklere
end hos de 3 foregaaende Arter, Kroppen næsten cylindrisk,
oventil kort og fint haaret, med Sidefortsatserne vel adskilte.
Hovedsegmentet neppe længere end de 2 følgende Segmenter
tilsammen; Halsen kort, Pandedelen successivt udvidet.
Haleseginentet simpelt cylindriskt, stumpt afrundet i Enden.
Øieknuden stump konisk, lige opadrettet, med forholdsvis
store Lindser. Snabelen noget kortere end
Hovedsegmentet, horizontal, noget afsmalnende. Saxleinmerne noget
lig samme hos Ch. spinosum, men med Haanden forholdsvis
kortere og Fingrene mindre spinkle. Følerne temmelig
forlængede, 2det og 3die Led omtrent af samme Længde,
sidste Led neppe kortere end næstsidste og begge
tilsammen lig 3die. De falske Fodder hos Hannen temmelig
spinkle, 5te Led successivt udvidet mod Enden og her
kort haaret; Randtornerne forholdsvis smaa, stumpt lancet-
large egg-cells. In the male, this joint (see fig. 3 i) is, as
usual, considerably narrower, and has on the inner edge
4 or 5 rounded nodules. The 2nd tibial joint is very
narrow, well-nigh linear, and about 2’j-, times longer than
the terminal section. The latter (see fig. 3 h) is
appreciably distinguished from that part in the 2 preceding
species, and is, on the whole, considerably more slender.
The tarsal joint is more than twice as long as it is broad,
and but very slightly expanded towards the extremity.
The propodal joint is much elongated, about 2’/3 times
longer than the tarsal joint, very narrow, linear, and armed
along the inner edge with a series of 12—16 rather
unequally developed spines. The terminal claw is somewhat
more than half as long as the propodal joint, and sharply
curved at the base. The auxiliary claws, contrary to
what occurs in the typical species, are well developed,
and almost half the length of the claw itself.
The outer egg-masses (see fig. 3 b) are smaller,
relatively, than in the preceding species, globular in form,
and contain a comparatively small number of uncommonly
large ova.
The colour of the animal is a pale yellow, with
brownish intestinal system shining through the skin.
Occurrence. I have now and again taken this species
on the West Coast of Norway, from the latitude of
Stavanger to Tjötö in Nordland. On the Coast of Finmark
I have, on the contrary, not observed it, nor was the
animal obtained on the North-Atlantic Expedition.
Distribution. Besides on the Coasts of Norway, the
species is only known with certainty from the British
Islands (Goodsir). It has thus, unquestionably, a more
southerly distribution than the other species of the genus.
35. Chætonymphon tenellum, G. O. Sars.
(Pl. XII, fig. 1, a—h).
Giætonymphon tenellum, G. O. Sars, Pycnogonidea borealia
& arctica, No. 35.
Specific Characters. Body relatively much more
slender than in the 3 preceding species, trunk well-nigh
cylindric, short and finely hirsute above, with the lateral
processes well separated. Cephalic segment scarcely
longer than the 2 following segments taken together; neck
short, frontal part successively expanded. Caudal segment
simple-eylindric, obtusely rounded at the extremity.
Oculiferous tubercle obtuse-conic, pointed straight upwards,
with comparatively large lenses. Proboscis somewhat
shorter than the cephalic segment, horizontal, slightly
tapering. Chelifori somewhat like those of Gl. spinosum,
but with the hand relatively shorter and the fingers less
slender. Palpi rather elongated, 2nd and 3rd joints of
about uniform length, last joint scarcely shorter than the
penultimate one, and both taken together equalling the
3rd. False legs in the male rather slender, 5th joint
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