111 



Arter, idet lier 3die Led er fuldkcminion saa langt som 

 2det, og de 2 sidste Led indbyrdes af ens Længde og til— 

 sammentagne lig 3die. 



De falske Fødder hos Hannen (Fig. 1 f) er, lige ud- 

 strakte, omtrent af Legemets Længde og af en temmelig 

 spinkel Form. 5te Led er stærkt forlænget og udvides 

 ganske successivt mod Enden, nden her at vise en saadan 

 abrupt Opsvnlmning som hos de 2 foregaaende Arter. 

 Ligeledes er de til dette Led fæstede Børster af et mere 

 uniformt Udseende og betydelig kortere og finere end hos 

 hine Arter. Randtorneme paa Endedelen (Fig. 1 g) er 

 forholdsvis smaa, stumpt lancetformige og uregelmæssigt 

 rundtakkede i Kanterne. 



Gangfodderne (se Fig. 1) er kjendelig spinklere end 

 hos de 3 foregaaende Arter, hvorved dog er at mærke, 

 at det undersogte Exemplar er en Han. De er ikke fuldt 

 3 G-ange hengere end Legemet og, navnlig i sit ydre Parti, 

 tæt laadne af temmelig lange og stive Haar. Laarleddet 

 har i Inderkanten 3 temmelig store, afrundede Knuder, 

 der er indskrænkede til det basale Parti af Leddet. 2det 

 Lægled er af smal lineær Form og omtrent 2 ] / 2 Gang 

 lrengere end det terminale Afsnit. Dette sidste (se Fig. 

 1 h) ligner noget samme hos Ch. spinosum, men har Tar- 

 salleddét forholdsvis længere. Fodleddet er ikke fuldt 

 dobbelt saa langt og tiltager lidt i Tykkelse mod Enden. 

 I Inderkanten har det en Rad af 12—14 tynde Torner 

 af noget ulige Længde, de i Midten længst. Endekloen 

 er forholdsvis kort, neppe mere end halvt saa lang som 

 Fodleddet. men temmelig kraftig og stærkt krummet ved 

 Basis. Bikloerne er som hos Ch. spinosum vel udviklede 

 og omtrent halvt saa lange som Kloen. 



Ingen af de 2 undersogte Exemplarer var ægbærende, 

 og om de ydre Ægmassers Form kan saaledes intet anføres. 



Forekomst. 2 Exemplarer af denne Art, begge 

 Hanner, toges under Nordhavs-Expeditionens sidste Togt 

 i Havet V. af Finmarken (Stat, 200) paa et Dyb af 620 F. 

 Da Stationen tilhører den kolde Area, er Arten utvivlsomt 

 at betragte som en ægte arktisk Form. 



36. Chætonymphon macronyx, G. 0. Sårs. 



(Pl. XII, Fig. 2, a— k). 



Nymphon macronyx, G. 0. Sårs, Prodrom. descript. Crust. 

 & Pycnog. p. 365 



Hoek, Pycnog. of „Knight Errant". 

 Report on the Challenger Pycnogonida, p. 95, Pl. XV, 

 fig. 1—7. 



Hansen. Kara Havets Pycnogonider, 

 p. 13, Tab. XVIII. Fig. 6, a— c. 



preceding species, the 3rd joint being in this animal fully 

 as long as the 2nd, and the 2 last joints uniform in length 

 and tåken together equal to the 3rd. 



The false legs in the male (fig. 1 f) are, when fully 

 extended, about same length as the body and rather slender 

 in form. The 5th joint is very much elongated, and 

 expands quite gradually towards the end without cxhihiting 

 there so abrupt a tumefaction as in the 2 preceding spe- 

 des. Moreover, the bristles affixed to that joint present 

 a more uniform appearance than in those said species. The 

 marginal spines on the terminal part (fig. 1 g) are eom- 

 paratively small, obtuse-lanceolate, and irregularly serrated 

 on the edges. 



The ambulatory legs (see fig. 1) are appreciably more 

 slender than in the 3 preceding species; we must, how- 

 ever, bear in mind that the specimen examined was a male. 

 They are not quite 3 times longer than the body, and. 

 more particularly in their outer pai*t, densely hirsute with 

 rather long and stitit hairs. The femoral joint bears on 

 the inner edge 3 rather large rounded tubercles, confined 

 in position to the basal part of the joint. The 2nd tibial 

 joint is narrow linear in form, and about 2 l /a times 

 longer than the terminal section. The latter (see fig. 1 h) 

 somewhat resembles that part in Ch. spinosum, but has 

 the tarsal joint relatively longer. The propodal joint is 

 not quite twice as long, and increases in thickness towards 

 the extremity. On the inner edge it bears a series of 

 12 — 14 slender spines, somewhat unequal in length, those 

 in the middle being longest. The terminal claw is relatively 

 short, scarcely more than half as long as the propodal 

 joint, but rather powerful and sharply curved at the base. 

 The auxiliary claws are well developed. as in Oi. spinosum, 

 and about half as long as the main claw. 



Neither of the 2 specimens examined was ovigerous, 

 and nothing can be said therefore respecting the form of 

 the outer egg-masses. 



Occurrence. Two specimens of this species. both 

 males, were tåken on the last cruise of the North-Atlantic 

 Expedition (St. 200), in the sea west of Finmark, at a 

 depth of 620 fathoms. As this Station lies in the cold 

 area, the species must unquestionably be regarded as a 

 true Arctic form. 



36. Chætonymphon macronyx, G. 0. Sats 



(Pl. XII. Sg. 2, a— ki. 



Nymphon macronyx, G. 0. Sårs, Prodrom. descript. Crust. 

 & Pycnog. p. 365. 



— Hoek, Pycnog. of ..Knight Errant." 



Report on the Challenger Pycnogonida, p. 95, Pl. XV, 

 figs. 1 — 7. 



Hansen. Kara Havets Pycnogonider, 

 p. 13. Tab. XVIII, fig. 6. a— c. 



