84 
i 
ubevaegelige stserkt indboiet. Felerne med 2det og 3die 
Led af ens Lsengde, sidste Led laengere end nmstsidste. 
De falske Fodder hos Hannen neesten 1 / s laengere end 
Legemet; Eudedelen noget laengere end 5te Led, Rand- 
tornerne forholdsvis noget smaekrere end hos foregaaende 
Art. Gangfodderne naesten 5 Gange laengere end Legemet, 
stserkt afsmalnende; 2det Laegled saerdeles smalt og for- 
laenget, dog neppe dobbelt saa langt som Laarleddet; Tar- 
salleddet og Fodleddet omtrent af ens Laengde, begge meget 
spinkle og linesere; Endekloen staerkt forlaenget, naesten af 
Fodleddets Lsengde ; Bikloerne yderst smaa. Legemets 
Laengde 18 ram ; Spandvidde 190™. 
Bemaerkninger. Naervaerende Form staar vistnok 
overordentlig nser foregaaende, men forekommer mig dog 
at maatte specifiskt adskilles, da jeg ved LTnclersogel.se 
af talrige Eemplarer af begge bar kunnet paavise Here 
distinctive Characterer, der synes mig at vaere konstante. 
Vistnok tror saavel Hoek som Hansen at have seet Over- 
gangsfcrmer; men begge disse Forskere har vaesentlig kun 
henholdt sig til en enkelt Karakter, nemlig Kloens Laengde 
paa Gangfodderne. At denne til on vis Grad vil kunne 
variere, anser jeg ikke for umuligt, skjondt jeg hos ingen 
af de under Nordhavs-Expeditionen indsamlede talrige 
Exemplarer har fundet nogen maerkbar Forskjel i denne 
Henseende. Hoek har, som Stotte for sin Antagelse af 
begge Formers Identitet, afbildet de ydre Fodled af l.ste 
Par Gangfodder hos et og samme Individ, hvoraf den ene 
Fod viser det saedvanlige Forhold af Kloen, medens den 
anden har mere Karakteren af N. Stremii. Jeg kan imid- 
lertid ikke indromme, at dette er et fuldgyldigt Bevis for 
begge Formers Artsidcntitet, da det ikke saa ganske 
sjelden hsender, at de ydre Led lean' veere deformerede 
paa en eller anden af Fodderne, som Folge af en tilfseldig 
Lsesion og ufuldkommen Regeneration. Foruden ved de 
ydre Fodlcds indbyrdes Lmngdeforhold og Endekloens 
betydelige Laengde, skiller naervaerende Art sig, som af 
ovenstaaende Diagnose vil sees, ved de endnu kraftigere 
udviklede Saxlemmer, paa hvilke Fingrene er kjendelig 
laengere i Forhold til Palmen, fremdeles ved det indbyrdes 
Laengdeforhold af Folernes Led, endelig ved Legemets be- 
tydeligere Storrelse og noget mere robuste Form. 
Da Miers omtrent samtidigt med Heller har beskre- 
vet en Nymphon-Art fra det antarktiske Hav under samme 
Navn, har Bohn 1 foreslaaet at forandre Artsnavnet gra- 
cilipes til Helleri. Miers liar imidlertid i en senere Af- 
handling .selv omdobt 'sin Art til N. antardicum, hvorfor 
den af Bohn foreslaaede Navneforandring bliver unod- 
vendig. 
Beskrivelse. Legemets Laengde hos de storste under 
Nordhavs-Expeditionen indsamlede Exemplarer er ikke mindre 
end 18™, mod en Spandvidde af 1 90™, og denne Art er 
saaledes ikke blot den storste af Slaegten, men tillige en af 
de storste bekjendte Pycnogonideer. 
almost straight, and of the immobile one greatly incurvated. 
Palpi with 2nd and 3rd joints equal in length, ultimate joint 
longer than the penultimate one. False legs in the male almost 
one-third longer than the body, terminal part somewhat 
longer than 5th joint, marginal spines relatively more slender 
than in the preceding species. Ambulatory legs almost 5 
times longer than the body, rapidly tapering; 2nd tibial 
joint exceedingly slim and elongate, yet hardly twice as 
long as the femoral joint; tarsal joint and propodal joint 
about equal in length, both very slender and linear ; terminal 
claw greatly elongated, length almost that of the propodal 
joint; auxiliary claws exceedingly small. Length of body 
18™, extent 190™. 
Remarks. The present form no doubt approximates 
to the preceding one very closely, but yet, should, it seems to 
me, be specifically distinguished, as, on examining numerous 
specimens of both, I have succeeded in detecting several 
distinctive characters, which appear, to me, to be constant 
ones. Both Hook and Hansen- believe, it is true, that they 
have observed transition* forms; but both those naturalists 
have dwelt chiefly on a single character, viz., the length of 
the claw on the ambulatory legs. That the character in 
question may vary to a certain extent, I do not regard as 
impossible, though I have not found any appreciable variation 
in that respect in any of the numerous specimens collected on 
the North Atlantic Expedition. To support his assumption of 
the identity of both forms, Hoek has drawn the outer leg-joints 
of the 1st pair of ambulatory legs in one and the same in- 
dividual, with the one log exhibiting the usual relations in 
the claw, whereas the other shows more the character of the 
relations in N. Stromri. I can not, however, admit that 
to be a perfectly satisfactory proof of the specific identity 
of both forms, as the outer joints are not so very infrequently 
deformed on one or other of the legs, in consequence of an 
accidental lesion and imperfect regeneration. Besides the 
longitudinal relations of the outer leg-joints inter se and the 
considerable length of the terminal claw, the present species 
is, as seen from the above diagnosis, distinguished by the 
still more powerfully developed obeli fori in which the fingers 
are appreciably longer in proportion to the palm, further, 
by the longitudinal proportion of the joints of the palpi inter 
se, and, finally, by the considerably larger size and some- 
what more robust form of the body. 
Dr. Miers having described about contemporaneously 
with Heller a Nymphon species from the Antarctic Ocean 
under the same designation, Bolin 1 has proposed to change 
the specific name Of gracilipes to Helleri. Miers , has, how- 
ever, himself, in a subsequent memoir, renamed his species 
N. antardicum ; the change of name proposed by Bohn is 
therefore now unnecessary. 
Description. The length of the body in the largest 
Specimens collected on the North Atlantic Expedition, is 
not less than 18™, with an extent of 190™; this species 
is, thus, not only the largest of the genus but also one of 
the largest Pycnogonidea known. 
/ 
1 Pycnogoniden des Museums zu Berlin. 
Pyenogoniden des Museums zu Berlin. 
