65 



mere end halvt saa lang som Fodleddet, men meget stærk. 

 Bikloerne ere vel udviklede og omtrent af Endekloens halve 

 Længde. 



De ydre Ægmasser var paa et af de undersøgte 

 Exemplarer (se Fig. 1) særdeles store og tilstede i dobbelt 

 Anta! paa hver af de falske Fødder. 



Forekomst. Jeg har af denne Art havt Anledning 

 til at undersoge 4 Exemplarer. indsamlede under Norden- 

 skjølds Expedition 1S75 i det kariske Hav. Dybden 3 — 12 

 Favne, Sandbund. 



Udbredning. Prof. Lilljeborg observerede denne Form 

 ved Schuretskaja i Russisk Lapland. Af andre Forskere 

 er den ikke noteret. Dog maa Arten ifølge de her opførte 

 Findesteder utvivlsomt ansees for en ægte arktisk Form. 

 og dens specifiske Benævnelse ,.glaciale" maa derfor kaldes 

 vel beerundet. 



18. Nymphon grossipes (Fa br.). 



I Pl. VI. fig. 2. a— i). 



Pycnogonum grossipes, Fabricius. Fauna grønlandica, p. 229, 



Nymphon grossipes, Krøyer, Grønlands Ampbipoder, p. 92. 



— Idem. Nat. Tidsskr. N. R.. Bd. 1, 



P- 



108. 



en Scandi- 



navie. Pl. 36, 



Idem. Gaimard's Voyage 

 . Fig. 1. a— h. 



— Wilson. Trans. Connect. Acad. Seien. 

 Vol. V, p. 20. Pl. VII. Fig. 1. a— q. 



— Idem. V. S. ( iommiss. of Fish and 

 Fisheries. Report for 1878, p. 491, Pl. VE, figs. 32— 37, 

 Pl. VII, fig. 42. 



— Hoek. Niederl. Arcb. f. Zool. Suppl. 1, 



p. 12. Pl. I, fig. 17—21. 



— — Hansen, Kara Havets Pycnogonider, 

 p. 16. Tab. XVIII, Fig. 8, 8 a. 



— — G. 0. Sårs, Pycnogonidea borealia & 

 arctica, No. 18. 



Artscharaeter. Legemet temmelig spinkelt, med Side- 

 fortsatserne vel adskilte. Hovedsegmentet omtrent saa la ngt 

 som de 3 følgende Segmenter tilsammen. Halsen smalt cy- 

 lindrisk. ai middelmaadig Længde, Pandedelen stærkt ud- 

 videt. Øieknuden boi. konisk tilspidset. Snabelen forholds- 

 vis stor. mesten af Hovedsegmentets Længde. Saxlemmerne 

 særdeles kraftige, Haanden af Skaftets Længde med Palmen 

 stærkt forlænget, mesten cylindrisk og tæt besat med kurte 

 Haar, Fingrene neppe men' end halvt saa lange og kun 

 meget svagt krummede i Spidsen. Følerne forholdsvis store, 

 2det Led ualmindelig kort. neppe niere end halvt saa langt 

 som 3die. sidste Led dobbelt saa langt som næstsidste og 

 afsmalnende mod Enden. De falske Fødder hos Hannen 

 stærkt forlængede, mere end ' ■, Gang til saa lange, som 

 Legemet. 5te Led noget længere end 4de. Endedelen kor- 

 tere end Ste Led. Randtornerne smalt lancetformige. med 



Den norsk- Nordhavsexpedition. G. 0. Surs: Pycnogonidea. 



The terminal claw is coinparatively short, only little more 

 tban half as loug as tlie propodal joint, but exceediugly 

 powerful. The auxiliarv claws are well developed. and are 

 about half the length of the terminal claw. 



The outer egg-masses were in one of the specimens 

 examined (see fig. 1 ) remarkably large, and present in double 

 the usual number on each of the false legs. 



Oecurrenee. Of this species I have had the opportunity 

 of examining 4 specimens collected on Nordenskjold's Ex- 

 pedition, 1875, in the Kara Sea: deptb from 3 to 1 2 

 fa thorns, bottom sandy. 



Distribution. Professor Lilljeborg observed this form 

 at Schuretskaja in Russian Lapland. By other naturalists 

 it is not recorded. The species must, however, to judge 

 from the localities lære given, be unquestionably regarded 

 as a true Arctic form, and. lience. its specific designation 

 „glaciale" must be said to be well founded. 



18. Nymphon grossipes, (Fabr.). 



(Pl. VI, fig. 



:. -1). 



Pycnogonwm grossipes, Fabricius, Fauna gronlandica, p. 229. 

 Nymphon grossijjes. Kroyer, Gronlands Ampbipoder. p. 92. 

 Idem. Nat, Tidsskr. N. R., Bd. 1. 

 p. 108. 



Idem. Gaimard's Voyage en Scandi- 

 navie. Pl. 36, fig. 1. a — h. 



Wilson, Trans. Connect. Acad. Seien. 

 Vol. V, p. 20; Pl. VII. fig. 1. a— q. 



Idem, U. S. Commiss. of Fish and 

 Fisheries. Report f..r 1878, p. 491, Pl. VI. figs. 32—37, 

 Pl. VII. fig. 42. 



Hoek. Niederl. Arcb. f. Zool. Suppl. 1. 

 p. 12. Pl. 1. fig. 17-21. 



Hansen. Kara Havets Pycnogonider, 

 p. 16. Tab. XVIII, fig. 8, 8 a. 



G. O. Sårs. Pycnogonidea borealia & 

 arctica, No. 18. 



Specific Characters. Body rather slim. witb the lateral 

 processes well separated. Cephalic segment about as loug 

 as the 3 succeeding segments tåken together, neck slender 

 cylindrical, of moderate length, frontal part greatly expanded. 

 Oculiferous tubercle high, conically acuminated. Proboscis 

 comparatively large, almost the length of the cephalic 

 segment, Chelifori exeeedingly powerful, hand the length 

 of scape. witb the palm greatly prolonged, well-nigh cylindric 

 and densely beset witb short hairs, ringers scarcely more 

 tban half as long and hut very gently curved at the tips. 

 Palpi comparatively large. 2ud joint uncommonly short. scar- 

 cely more tban half as long as the 3rd one; last joint twice 

 as long as the penultimate one and tapering towards the 

 extremity. False legs in male excedingly elongated, more tban 

 half as long again as the body, 5th joint somewhat longer 

 tban the 4tli. terminal part sborter tban 5th joint, marginal 



9 



