81 
Nymphon Strewn, G. 0. Sars, Pycnogonidea borealia. & 
arctica, No. 24. 
Artscharaeter. Legemet noget undersaetsigt, med tem- 
melig tvkke og ikke meget vidt skilte Sidefortsatser. Hoved- 
segmentet meget stort, saa langt som de 3 folgende Seg- 
menter tilsammen, Halsen kort, Pandedelen stairkt udvidet. 
0ieknuden meget lav og afrundet i Enden, Snabelen af 
Hovedsegmentets Lsengde. Saxlemmerne srerdeles kinftigt 
udviklede. Skaftet noget fortykket i Enden. Haanden meget 
stor, lsengere end Skaftet, nsesten nogen, buet; Eingrene 
forlmngede, omtreut af Palmens Laengdo, begge med Enden 
skarpt tilspidset og indboiet, Tsenderne i Inderkanten af 
den ubevmgelige Finger Ijetydelig storre og fserre i Antal 
end paa den bevmgelige Finger. Folerne slanke, dobbelt 
saa lange som Snabelen, 2det Led lidt lsengere end 3die, 
de 2 ydre Led meget smale og forlsengede, sidste Led 
korfest. De falske Fodder kun lidet lamgere end Legemet, 
4de og 5te Led af ens Lsengde, Endedelen lsengere end 
5te Led, Randtomerne tykke, triangulsert tilspidsede, med 
mere eller mindre tydeligt saugtakkede Kanter. Gaugfod- 
derne omtrent 5 Gange lamgere end Legemet og nsesten 
nogne ; 2det Lsegled mesten dolibelt saa langt som Laai- 
leddet og 4 Gange lamgere end det terminale Afsnit; 
Tarsalleddet linesert. Fodleddet betydelig kortere, med 
meget smaa Torner i Inderkanten ; Endekloen kort og tyk, 
neppe halvt. saa lang som Fodleddet; Bikloerne ikke fuldt 
i/ 3 saa lange som Endekloen. Farven rodgul. Legemets 
Lsengde 15””"; -Spandvidde 150”"". 
Bemserkninger. Jeg anser det for meget rimeligt, 
at Strom’s Phalangium marinum er denne Art. Ligeledes 
synes det mig at vsere utvivlsomt, at den af 0. Fr. Muller 
under Bensevnelsen Nymhpon grossipes opforte og af Abild- 
gaard p. o. a. St. afbildede Form borer herhen. Mere 
tvivlsomt kunde det synes at vsere, hvorvidt Goodsir’s 
N. giganteum er identisk med nmrvserende Art, da denne 
Forfatter kun med et Par Ord omtaler samme, Men 
allerede Artsbetegnelsen synes mig dog med Bestemthed 
at pege hen paa nservaerende Form, der horer til vore 
storste Pyonogonideer. Angaaende den af Wilson beskrevne 
Form, bar jeg vseret i nogen Tvivl, om den ikke maaske 
snarere var at henfore til folgende Art. Dog synes mig, 
at Be skafi'enheden af de ydre Fodled, saaledes som de er 
afliildede af denne Forsker, mere stemmer med samme 
hos N. Strondi. Jeg anser det forovrigt lor sandsynligt, 
at Wilson har liavt for sig begge Arter, uden at have 
erkjendt deres Artsforskjel. Ogsaa de fleste nyere Autores 
har sammenblandet Kroyers Art med den folgende, meget 
naerstaaende N. gradlipes Heller. Fra de foregaaende 
Arter er nservaerende Form meget let kjendelig ved de 
ualmindelig store Saxlemmer, de stserkt forlamgede Folere, 
og ved den betydelige Stor r else. 
Beskrivelse. Legemets Lsengde gaar op til 15”™, 
med en Spandvidde af'150’”" 1 , og denne Art horer saaledes 
til de storste Arter af Slsegten. 
Legemets Form (se PI. VIII, Fig. 2) maa vel idethele 
kaldes spinkel. navnlig naar Hensyn tages til de stserkt 
Den norske Nordhavsexpedition. 6. 0. Sars: Pycnogonidea. 
Nymphon Strdmii, G. 0. Sars, Pycnogonidea borealia & 
arctica, No. 24 
Specific Characters. Body somewhat thickset, with 
rather thick and no‘t very widely separated lateral processes. 
Cephalic segment very large, as long as the 3 succeeding 
segments taken together, neck short, frontal part greatly 
expanded. Oculiferous tubercle very low and rounded at 
the end. Proboscis same length as the cephalic segment. 
Chelitori particularly powerfully developed, scape tumeficated 
somewhat at the extremity, hand very large, longer than the 
scape, almost bare, arcuate ; fingers elongated, about the length 
of the palm, both with the extremity sharply pointed and 
incurvate, teeth on the inner margin of the immobile finger 
considerably larger and less numerous than on the mobile 
finger. Palpi slender, twice as long as the proboscis, 2nd 
joint a little longer’ than the 3rd, the 2 outer joints very slim 
and elongated, last joint shortest. False legs but little 
longer than the body, 4th and 5th joints equal in length, 
terminal part longer than the 5th joint, marginal spines 
stout, triangularly acuminated, with more or less distinct 
serrated edges. Ambulatory legs about 5 times longer than 
the body and well-nigh bare; 2nd tibial joint almost twice 
as long as the femoral joint and 4 times longer than the 
terminal section ; tarsal joint linear, propodal joint consider- 
ably shorter, with minute spines on the inner edge; terminal 
claw short and thick, hardly half as long as the propodal 
joint; auxiliary claws not quite one-third the length of the 
terminal claw. Colour reddish-yellow. Length of body 
15”"", extent 150”™. 
Remarks. I regard it to be very probable, that Stroms 
Phalangium marinum is this species. In my judgment, 
too, thi‘ form recorded by 0. Fr. Muller under the designation 
Nymphon grossipes, and illustrated by Abildgaard, belongs 
undoubtedly to . it. There is, it would seem, greater reason 
to question the identity of Goodsir’s N. giganteum with the 
present species, as that author notices the animal with a few 
words only. Meanwhile, the specific designation itself clearly 
points, I think, to the present form, which is one of the 
largest of our Pycnogonids. As regards the form described 
by Wilson, I have felt some doubt whether it should not 
rather be referred to the following species. The character of 
the outer leg-joints, however, as these are illustrated by that 
naturalist, exhibit, I think, closer agreement with that of 
N. Strimii. I think, however, that Wilson probably had 
both species before him, but failed to recognise their specific 
distinction. Most later authors, too, have confounded Kroyer s 
species with the following very nearly related form. N. 
gradlipes, Heller. The present form is easy to distinguish 
from the preceding species, by the remarkably large cheli- 
fori, the greatly elongated palpi, and by its great size. 
Description. The length of the body reaches as 
much as 15 mm , the extent 150”™; and this species is there- 
fore one of the largest of the genus. 
The. body (see PI. VIII, fig. 2) must, on the whole, 
be described as slender, more especially as regards 
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