76 



Nymphon longitarse, Hoek, Niederl. Archiv f. Zool. Sup- 



plem. 1. p. 15, Pl. 1, fig. 22—23. 



Gr. 0.' Sars, Pycnogonidea borealia & 



arctica, No. 22. 



Artscaaracter. Legemet overordentlig spinkelt, med 

 vidt skilte Sidefortsatser. Hovedsegnientet stærkt forlænget, 

 længere end de 3 følgende Segmenter tilsammen, Halsen 

 særdeles lang og smal, Pandedelen jevnt udvidet mod Enden. 

 Øieknuden stumpt tilrundet. Snabelen noget kortere end 

 Hovedsegmentet. Saxlemmerne forholdsvis svage. Haanden 

 noget koi-tere end Skaftet, kun lidet t opsvulmet, haaret, 

 Fingrene forlængede, af Palmens Længde og stærkt krum- 

 mede i Spidsen. Følerne spinkle, 2det og 3die Led af 

 ens Længde, næstsidste Led noget kortere end sidste og 

 begge tilsammen længere end 3die. De falske Fødder hos 

 Hannen '/. 2 Gang længere end Legemet, 4de og 5te Led 

 af ens Længde, Endedelen længere end 5te Led ; Rand- 

 tornerne forholdsvis smaa og mindre tæt saugtakkede end 

 hos foregaaende Art. Gangfødderne overordentlig spinkle, 

 mere end 5 Gange længere end Legemet og besatte med 

 korte spredte Haar: 2det Lægled næsten dobbelt saa langt 

 som Laarleddet og særdeles smalt. Tarsalleddet forlænget, 

 lineært ; Fodleddet lidet mere end halvt saa langt, Inder- 

 kanten besat med meget smaa Torner; Endekloen neppe 

 mere end halvt saa lang som Fodleddet; Bikløerne meget 

 smaa. Farven blegrød. Legemets Længde 6"""; Spand- 

 vidde 62""". 



Bemærkninger. Nærværende Art ligner noget i sin 

 ydre Habitus den ovenfor beskrevne N. microrhynchum, 

 med hvilken Dr. Hansen har forvexlet den, men er let 

 kjendelig ved den betydelig stærkere forlængede Hals, Øie- 

 knudens Form, Saxlemmernes Bygning og Forholdet af de 



2 ydre Fodled. 



Beskrivelse. Legemets Længde er omtrent 6""", med 

 en Spandvidde af 62""". 



Formen er hos denne Art (se Pl. VII, Fig. 3) maaske 

 spinklere end hos nogen anden Art af Slægten, saavel 

 hvad Kroppen som Lemmerne angaar. Kroppen (Fig. 3 a, 



3 b) er af den sædvanlige smalt cylindriske Form, dog 

 ovenfra seet noget afsmalnede bagfra fortil (se Fig. 3 a). 

 Sidefortsatserne er lange og smale, samt skilte ved brede 

 Mellemrum; som hos JV. mixtum, udgaar de alle fra den 

 bagre Del af de respektive Segmenter. Hovedsegmentet 

 er af meget betydelig Størrelse, selv længere end de 3 

 følgende Segmenter tilsammen, og udmærket ved den over- 

 ordentlig smale og forlængede Hals. Pandedelen udvides 

 jevnt mod Enden og er her mere end dobbelt saa bred 

 som Halsen. 



Wieknuden (Fig. 3 c), der paa Grund af Halsens 

 Længde er mere end 3 Gange længere fjernet fra Pande- 

 randen end fra Hovedsegmentets bagre Hand, er noget 

 ophøiet, men. uligt de tleste øvrige Arter, stumpt afrundet 

 i Enden. Lindserne er forholdsvis store og beliggende 

 omtrent ved Midten af Øieknudens Høide. 



Nymphon longitarse, Hoek, Niederl. Archiv. f. Zool. Suppl. 



1. p. 15, Pl. 1, fig. 22—23. 

 — — G. 0. Sars, Pycnogonidea borealia & 



arctica, No. 22. 



Specifle Characters. Body remarkably slender, with 

 widely separated lateral processes. Cephalic segment very 

 much elongated, longer than the 3 sueceeding ones tåken 

 together, :ieck exceedinglv long and slender, frontal part 

 evenly expanded towards the extremity. Oculiferous tubercle 

 obtusely rounded. Proboscis somewhat shorter than the cep- 

 halic segment. Chelifori relatively feeble, hand a trifle shorter 

 than the scape, only little swollen, hah*y, fingers elongate, 

 same length as the palm, and sharply curved at the point. 

 Palpi slender, 2nd and 3rd joints equal in length, penultimate 

 joint somewhat shorter than the ultimate one andboth together 

 longer than the 3rd. False legs in male x /., as long again as the 

 body, 4th and 5th joints equal in length, terminal part longer 

 than 5th joint; marginal spines comparatively small and less 

 densely serrate than in the preceding species. Ambulatory 

 legs remarkably slender, more than 5 times longer than 

 the body, and beset with short, scattered hairs; 2nd tibial 

 joint well-nigh twice as long as the femoral one and exeeed- 

 ingly slender; tarsal joint elongate, linear; propodal joint 

 little more than half as long, inner edge beset with minute 

 spines; terminal claw scarcely more than half the length 

 of the propodal joint ; auxiliary claws very small. Colour 

 pale red. Length of body 6""", extent 62'"'". 



Remarks. The present species exhibits. in its outer 

 habitus, some resemblance to the above described N. mic- 

 rorhynchum, with which Dr. Hansen has confounded it. but 

 it is easily distinguishable by the much more elongated neck, 

 the form of the oculiferous tubercle, the structure of the 

 chelifori, and the relative lengths of the 2 outer leg-joints. 



Deseription. The length of the body is about 6""", 

 the extent 62""". 



The body (see Pl. VII, fig. 3) is in this animal 

 more slender. perhaps, than in any other species of the 

 genus, both as regards the trunk and the limbs. The 

 trunk (fig. 3 a. 3 b) is of the usual narrow, cylindrical form 

 but, viewed from above, diminishes a little from rear to front 

 (see fig. 3 a). The lateral processes are long and slender, 

 and are separated by wide intervals; as in N. mixtum, 

 they all issue from the posterior part of the respective 

 segments. The cephalic segment is ol very considerable 

 size, longer even than the 3 following segments tåken 

 together, and is characterised by the remarkably slender 

 and elongated neck. The frontal part expands uniformly 

 towards the end, and is here more than twice as broad 

 as the neck. 



The oculiferous tubercle (fig. 3 c), which, owing to 

 the length of the neck, lies more than 3 times fart her 

 from the frontal margin than from the posterior edge of 

 the cephalic segment, is somewhat elevated but. unlike most 

 of the other species, is obtusely rounded at the extremity. 

 The lenses are comparatively large, and are located about 

 midway up the tubercle. 



