130 



delig store, kjendelig længere end Kroppen er bred, og 

 kun adskilte ved smale Mellemrum. De er noget fortyk- 

 kede i Enden og langs Kanterne fint haarede. Hovedseg- 

 mentel er omtrent saa langt som de 3 følgende Segmenter 

 tilsammen og afsmalnes kjendeligt fortil, idet Pandedelen 

 kun er meget svagt udvidet. I nogen Afstand fra de for- 

 rest.' Sidefortsatser udgaar fra Halsdelen til hver Side et 

 temmelig stort, smalt afrundet Fremspring, hvortil de falske 

 Fi (ilder er indleddede. Halesegmentet (Fig. 1 g) er, uligt 

 livad Tilfældet er hos de fleste øvrige Pycnogonideer, meget 

 skarpt afsat fra sidste Kropssegment, med hvilket det synes 

 at være bevægeligt artieuleret. Det er forholdsvis smalt, 

 men af betydelig Længde, omtrent ligt de 3 bagerste Krops- 

 segmenter tilsammen, og horizontalt bagudrettet. Af Form 

 er det smalt tendannet, stærkt indknebet ved Basis og suc- 

 cessivt udvidet til bag Midten, hvor det danner en nogét 

 vinkelformig Boining; det er her forsynet med en Tværrad 

 a f 4 — (j stærke, divergerende Børster, hvoraf de 2 staar 

 fcæt sammen paa Rygsiden. Denne Tværrad af Børster i 

 Forbindelse med den eiendommelige Bøining paa dette Sted 

 giver ved første Øiekast Indtrykket af en Segmentering, 

 og Kroyer har ogsaa feilagtigt beskrevet Halesegmentet 

 som bestaaende af 2 Led. 



Øieknuden (se Fig. 1 1], 1 c), der har sin Plads lidt 

 foran Midten af Hovedsegmentet, er stærkt ophøiet. noget 

 foroverrettet, og af meget smal cylindrisk Form. Toppen 

 er noget fortykket og ender i en stump Spids samt har 

 til hver Side et lidet tandformigt Fremspring. Lindserne 

 er vel udviklede, af middels Størrelse, og beliggende lige 

 ved Enden af Øieknuden. 



Snabelen (Fig. 1 d) er af en meget eiendommelig 

 Bygning. Den bestaar nemlig af to skarpt afsatte og med 

 hinanden beva^geligt forbundne Dele, et smalt cylindriskt, 

 lige fortilrettet Skaft, omtrent af Hovedsegmentets halve 

 Længde, og et .stærkt opsvulmet, tentormigt Endeparti, der 

 ialmindelighed er bøiet ind under Kroppen. Naar begge 

 Dele er udstrakte i samme Plan (se Fig. 1 a) er Snabelens 

 Længde omtrent lig de 4 egentlige Kropssegmenter til- 

 sammen. Af de to ovennævnte Dele er det egentlig 

 kun Endepartiet, der svarer til Snabelen hos andre Pyc- 

 nogonideer. 



Saxlemmerne (Fig. 1 e) maa vistnok, som. hos de til 

 foregaaende Familie horende Former, siges at være rudi- 

 mentære, forsaavidt som de hos fuldt udviklede Individer 

 mangler en egentlig Chela, men de er dog af ikke ube- 

 tydelig Længde. idet de er mere end halvt saa lange som 

 Legemet. De er forholdsvis meget smale, næsten lige 

 fortilstrakte, og bestaar af 3 tydeligt begrændsede Led. 

 Af disse tilhører de 2 første [aabenbart Skaftet, som saa- 

 ledes. afVigende fra hvad Tilfældet pleier at være' hos 

 Pycnogonideerne, er 2-leddet. Iste Led er noget kortere 

 og betydelig tykkere end 2det, der er af smal lineær 

 Fonn; begge er paa den øvre Side forsynede med stærke, 



are unusnally large, appreciably longer than the trunk is 

 broad, and are only separated by narrow intervals. They 

 are somewhat tumeficated at the extremity and finely setous 

 along the margins. The eephalie segment is about as 

 long as the 3 succeeding segments tåken together, and 

 tapers appreciably in front, as the frontal part is only 

 very faintly expanded. At some distance from the fore- 

 most lateral processes, a pretty large, narrow, rounded 

 prominence, to which the false legs are articulated, issues 

 on eaeh side from the cervical part. Thecaudal segment 

 (fig. 1 g) is. uulike the case in other Pycnogonids, very 

 sharply demarcated from the last segment of the trunk, 

 with which it seems to be fiexibly articulated. It is 

 relatively narrow hut of considerable length, about equal 

 to the 3 posterior segments of the trunk tåken together, 

 and is directed horizontally backwards. In shape it is 

 narrow fusiform, strongly constricted at the base antl 

 successively expanded till behind the middle, where it 

 forms a somewhat angular bend; it is here furnished with 

 a transversal series of 4—6 strong, divergent bristles, of 

 which 2 stand close together on the dorsal side. This 

 transversal series of bristles in conjunction with the peculiar 

 bend at this part gives, at the first glance, the impression 

 of a segmentation, and Kroyer has also erroneously described 

 the caudal segment as consisting of 2 joints. 



The ocular tubercle (see fig. 1 b, 1 c), which is situ- 

 ated a little in front of the middle of the eephalie seg- 

 ment, is strongly protuberant, directed somewhat forward, 

 and very narrow cylindric in form. The top is somewhat 

 tumeficated and terminates in a blunt point, and on eaeh 

 side has a small dentiform prominence. The lenses are 

 well developed, of medium size, and are situated quite at 

 the extremity of the ocular tubercle. 



The proboscis (fig. 1 d) is very peculiar in structure. 

 It consists, namely, of 2 sharply defined parts fiexibly 

 connected to eaeh other, a narrow, cylindrical scape 

 directed straight forward, about half the length of the 

 eephalie segment, and a strongly swollen, fusiform ter- 

 minal part, which is usually folded in under the trunk. 

 When both portions are extended in the same plane (see 

 fig. 1 a) the length of the proboscis is about equal to 

 that of the 4 segments proper of the trunk, tåken together. 

 Of the 2 above-named portions, it is really only the ter- 

 minal part that corresponds to the proboscis in other 

 Pycnogonids. 



The chelifori (fig. 1 e) must certainly, as in the forms 

 pertaining to the preceding families, be said to be rud- 

 imentary, in so far that they in fully developed indiviiluals 

 have no real chela, but, still, they are of no inconsider- 

 able |length as they are more than half as long as the 

 body. They are relatively very narrow, extended alm ost 

 straight forward, and consist of 3 distinctly demarcated 

 joints. Of these the 2 first evidently pertain to the scape, 

 which thus, differing from wliat is usually the case in the 

 Pycnogonids, is 2-jointed. The Ist joint is somewhat shorter 

 and considerably thicker than the 2nd, which is narrow 

 linear in form; both are furnished on the upper side with 



