56 



med mere eller mindre tydelige violette Tværbaand. Lege- 

 mets Længde 2 1 //""; Spandvidde 15 



Bemærkninger. Nærværende Art er egentlie forst 

 Ifjendeligt beskreven afHoek. Hvorvidt den i Virkeligheden 

 identisk med den af Leach saaledes benævnte Art. an- 

 ser ogsaa Hoek for meget tvivlsomt. Derimod mener han 

 med Besterathed i Johnstons Beskrivelse at gjenkjende sin 

 Ari. Om den her omhandlede Forms Identitet med den 

 af Hurk beskrevne, kan der efter min Mening ingensom- 

 helsl Tvivl være. Egentlig er Artsnavnet r/rarile kun lidet 

 betegnende, da der gives mange Arter af en langt slankere 

 Kropsform, ja nærværende Form horer endog i Virkelig- 

 heden til de i denne Henseende mindst udprægede af 

 Slægten. 



Beskrivelse. Hos ingen af de af mig indsamlede 

 Exemplarer overskrider Legemets Længde 2 1 j 9 mm . medens 

 Hoek angiver 4""" som Maximum. Spandviden har jeg fun- 

 det at være omkring 15""". Af alle her opførte Arter af 

 Slægten er denne saaledes den mindste. 



Legemets Form (se Pl. V, Fig. 1) er vistnok temme- 

 lig spinkel, sammenlignet med samme hos flere andre Pyc- 

 nogonideer; men blandt Arterne af nærværende Slægt ud- 

 mærker den sig, som ovenfor bemærket, slet ikke i saa 

 Henseende. Ja Gangfødderne er her i Forhold til Kroppen 

 endog kortere end hos nogen af de her opførte Arter. 

 Selve Knippcn (Fig 1 a. 1 b) er cylindrisk og noget nær 

 af ens Bredde overalt, ganske glat og med Segmenterne 

 vel sondrede fra hinanden. Sidefortsatserne er omtrent saa 

 Lange som Kroppen er bred og vel adskilte, skjøndt Mellem- 

 rammene mellem dem ikke er synderlig brede. Hovedseg- 

 nientet er temmelig stort, omtrent saa langt som de 2 fol- 

 gende Segmenter tilsammen og har en tydelig, skjøndt for- 

 holdsvis kort Hals; Pandedelen er ved Enden omtrent dob- 

 belt saa bred som Halsen og langs Midten oventil noget 

 rendeformigt fordybet. Halesegmentet er forholdsvis lidet, 

 simpelt eylindriskt og afrundet i Enden, samt noget opad- 

 rettet, 



Øieknuden (se Fig. 1 a. 1 c), hvis Afstand fra Pande- 

 randen er omtrent dobbelt saa stor som fråden bagre Kant 

 af Hovedsegmentet, er noget ophoiet. af stump konisk Funn : 

 dog er Hoiden neppe saa stor som Breden ved Basis. 

 Lindserne er vel udviklede, af ens Størrelse og beliggende 

 nærmere Basis end Spidsen af Øieknuden ; det underliggende 

 Pigment er af mørkerød Farve. 



Snabelen (se Fig. 1 a. 1 b) er noget kortere end Ho- 

 vedsegmentet og lige fortilstrakt. Den er temmelig tyk, 

 cylindrisk, med Enden stumpt tilrundet, og ganske glat. 



Saxlemmerne (ibid.) er kraftigt udviklede og lige ud- 

 strakte, betydelig kengere end Hovedsegmentet. Skaftet er 

 eylindriskt, lidt buet og ved Enden i den ydre Kant for- 

 synet med nogle kurte Haar. Haanden (Fig. 1 d). der 

 sædvanligvis er rettet indad under en ret Vinkel med Skaf- 

 tet, er omtrenl af dettes Længde, temmelig opsvulmet, af 

 aflang oval Form og henimod Basis af Fingrene besat med 



Colour white, with more or less distinct violet transversal 

 bands. Length of body 2 1 l i mm , extent 15""». 



Remarks. Hoek was really the first to give a recog- 

 nizable description of the present species. But whether 

 it is really identical with the species thus designated by 

 Leach. Hoek also regards as very doubtful. On the other 

 hand, he feels quite sure that the form described by John- 

 ston can he none other than his species. The identity of 

 the form treated oi here with Hoelrs species can. in my 

 judgment, admit of no doubt whatever. The specifie narae 

 gracile is really not significative. as there are many species 

 with a far more slender body. indeed the present form 

 belongs even to the least characteristic of the genus in 

 that respect. 



Description. In none of the specimens collected by 

 the writer does the length of the body exceed 2 1 / 2 '" m , 

 whereas Hoek gives 4'"" as the maximum. The extent I 

 have found to be about 15""". Of all the species recorded 

 here. this is therefore the smallest. 



The body (se Pl. V. fig. 1) is indeed rather slender 

 compared with that of several other Pycnogonids; but. 

 as stated above, in this respect it in nowise distinguishes 

 itself among the species of the present genus. Indeed, 

 the ambulatory legs are. in relation to the body. even 

 shorter than in anv of the species here recorded. The 

 trunk itself (fig. 1 a. 1 b) is cylindric and well-nigh uniform 

 in breadth throughout, quite smooth. and with the segments 

 well separated from each other. The lateral processes 

 are about as long as the trunk is broad, and well separated. 

 though the interspaces between them are not particularly 

 broad. The cephalic segment is rather large, about as 

 long as the- 2 succeeding segments tåken together, and has 

 a distinct though comparatively short neck; the frontal 

 part is at the end about twice as broad as the neck. and 

 along the middle dorsally somewhat canalicularly hollowed. 

 The caudal segment is comparatively small, simple cylindric. 

 rounded at tlie extremity and also directed a little up- 

 wards. 



The oculiferous tubercle (see fig. 1 a, 1 c). located 

 about twice as far from the frontal edge as from the 

 posterior edge of the cephalic segment, is somewhat ele- 

 vated, conically obtuse in form; the height is. however, 

 scarcely as great as the breadth at the base. The lenses 

 are well developed, equal in size. and located nearer to 

 the base than to the point of the oculiferous tubercle ; the 

 subjaeeiit pigment has a dark-red colour. 



The proboscis (see fig. 1 a. 1 b), pointing straight 

 forwards, is somewhat shorter than the cephalic segment. 

 It is rather thick. cylindric. with the tip obtusely rounded. 

 and quite smooth. 



The clielifori (ibid.) are powerfully developed and, 

 extended straight out, a good deal longer than the cephalic 

 segment. The scape is cylindrical, somewhat arcuate, and 

 at the extremity on the miter edge provided with a few short 

 hairs. The hand (fig. 1 dl. which is generally directed in- 

 wards at a right angle to the scape, attains about the length 

 of that part, is rather swollen, oblongo-oval in form. and 



