66 



et Par stærke Tænder nærmere Basis, Yderdelen tint saug- 

 takket. Gangfødderne tynde og forlængede, 4 Gange læn- 

 gere end Legemet, næsten nogne, 2det Lægled 1 / s længere 

 end Laarleddet og 3 Gange saa langt som det terminale 

 Afsnit; Tarsalleddet lineært, sædvanlig lidt længere end 

 Fodleddet; dette sidste stærkt krummet og bevæbnet i In- 

 derkanten med circa 6 forlængede Tomer ; Endekloen kraf- 

 tig, noget mere end halvt saa lang som Fodleddet; Bi- 

 kløerne vel udviklede, næsten af Endekloens halve Længde. 

 Legemets Længde 6 mm : Spandvidde 54"'"'. 



Bemærkninger. Hvorvidt Fabriciuss Pycnogonum 

 grossipes er identisk med nærværende Form. maa jeg anse 

 for noget tvivlsomt. Sikkert er det imidlertid at Krøyers 

 Nymphon grossipes falder sammen med den her omhandlede 

 Art. Artsnavnet grossipes synes imidlertid af tiere af de 

 tidligere Autorer at have været anvendt for andre Arter, 

 navnlig A 7 . Strømii, og i den nyere Tid har enkelte For- 

 skere følgende Wilsons Exempel, under dette Navn tillige 

 indbefattet 2 andre Krøyerske Arter, nemlig N. brevitarse 

 og A. mixtum. At dette er urigtigt, er allerede ovenfor 

 paavist for den første af disse Arters Vedkommende, og og- 

 saa den sidste af disse Former tror jeg, som nedenfor vil 

 sees. at kunne hævde som en vel begrundet Art. I den 

 Begrændsning, hvori jeg opfatter nærværende Art, er den 

 blandt andet vel characteriseret ved de ualmindelig kraftigt 

 udviklede Saxlemmer. hvis Haaud desuden viser en meget 

 eiendommelig Form. fremdeles ved Folernes Bygning og 

 navnlig det indbyrdes Længdeforhold af disse Lemmers Led. 



Beskrivelse. Legemets Længde hos fuldt udviklede, 

 ægbærende Individer har jeg fundet at være omkring i> '". 

 med en Spandvidde af 54""". Arten opnaar saaledes en 

 meget betydeligere Størrelse end de i det foregaaende om- 

 talte Former. 



Legemsformen (se Pl. VI, Fig. 2) maa idethele siges 

 at være temmelig spinkel, og navnlig er Fodderne betydelig 

 længere end hos de i det foregaaende omtalte Arter. Selve 

 Kroppen (Fig. 2 a, 2 b) er af den sædvanlige cylindriske 

 Form, med Segmenterne skarpt markerede og Sidefortsat- 

 serne temmelig stærkt forlængede samt skilte ved forholds- 

 vis brede Mellemrum. Hovedsegmentet er af betydelig 

 Størrelse, omtrent saa langt som de 3 folgende Segmenter 

 tilsammen, og har en tydeligt begrændset, smalt cylindrisk 

 Hals. Den foran samme beliggende Pandedel er stærkt 

 udvidet, næsten 3 Gange bredere end Halsen og har den 

 forreste Kant, mellem Insertionen for Saxlemmerne, jevnt 

 udrandet. Halesegmentet (Fig. 2 i) er tydeligt indskaaret 

 i Spidsen, forovrigt af sædvanligt Udseende. 



Øieknuden (Fig. 2 c), der ligger omtrent dobbelt saa 

 langt fra Panderanden som fra Hovedsegmentets bagre Rand, 

 er stærkt ophøiet og konisk tilspidset i Enden. Lindserne 

 er forholdsvis store og ligger nærmere Basis end Spidsen 

 af Øieknuden. 



spines slender lanceolate, with a pair of strong teeth near 

 the base, outer part tinely serrated. Ambulatory legs 

 slender and elongated, 4 times the length of the body, well- 

 nigh bare ; 2nd tibial joint 1 / 3 longer than the femoral joint 

 and 3 times as long as the terminal part ; tarsal joint linear, • 

 usually rather longer than the propodal joint ; the latter 

 very considerably curvate and arnied on the inner edge 

 vv-ith about 6, elongate spines ; terminal claw powerful. a 

 little more than halt as long as the propodal joint ; auxiliary 

 claws well developed. almost half the length of the terminal 

 claw. Length of body 6""": extent 54""". 



Remarks. Whether Fabricius's Pycnogonum gros- 

 sipes is identical with the present form I must regard as 

 somewhat open to doubt. Meanwhile, it is quite certain 

 that Kroyer's Nymphon grossipes agrees exactly with 

 the species treated of here. The specitic term grossipes 

 would seem, however, to have been applied by divers of 

 the earlier authors to other species, more especially to N. 

 Stromii, and of late a few naturalists have comprised 

 under this designation 2 other species of Kroyers. viz., A'. 

 brevitarse and A', mixtwm. That such a classification is 

 wrong, has been already shown above with respect to the 

 former of those species ; and also the latter of the two can, 

 I think, as will appear farther on, be maintained as a 

 well-defined species. In the restricted sense in which I 

 have regarded the present species, it is well characterised, 

 among other criteria, by the remarkably powerfully developed 

 chelifori, their hand, too, exhibiting a very peculiar form; iur- 

 thermore, by the structure of the palpi, and. in particular, by 

 the longitudinal relations of the joints of those limbs mutually. 



Deseription. The length of the body in fully devel- 

 oped. ovigerous individuals I have found to be, about 6""", 

 the extent 54""". The species attains. therefore, a much 

 more considerable size than any of the foregoing forms. 



The body (see Pl. VI. fig. 2) must, on the whole. be 

 called rather slender. the Legs esspecially being much 

 longer than in any of the previously mentioned species. The 

 trunk itself (fig. 2 a. 2 b) is of the usual cylindrical form. with 

 the segments sharply marked off, and the lateral processes 

 considerably elongated and separated by relatively broad intei - - 

 spaces. The cephalic segment is of considerable size, about 

 as long as the 3 following segments tåken together, and has a 

 distinetly defined, narrow cylindric neck. The frontal part, 

 located before it. is verv much expanded, almost 3 times 

 broader than the neck, and has the anterior edge, between 

 the insertion of the chelifori. evenly emarginate. The 

 caudal segment (fig. 2 i) is distinetly incised at the point, 

 otherwise its appearance is as usual. 



The oculiferous tubercle (fig. 2 c), placed at about 

 twiee the distance from the frontal margin as from the 

 posterior edge of the cephalic segment, is strongly pro- 

 tuberant and conically acuminated at the extremity. The 

 lenses are comparatively large and lie nearer to the base 

 than the point of the oculiferous tubercle. 



