122 



Hovedsegmentef som fra den følgende Del af Truncus; 

 forøvrigl er ingen tydelig Segmentering paa Kroppen be- 

 mærkelig. Sidefortsatserne er (se Fig. 1 b) temmelig tykke, 

 næsten kølledannede, og har ved Enden oventil 2 ens ud- 

 viklede pigforinige Fortsatser, hver endende med en stiv 

 Børste. Hovedsegmentet indtagér ikke fuldt '/a af Krop- 

 pens Længde og er næsten jevnt tykt, nden nogen tydelig 

 Hals. Dets tuireste Parti, eller Pandedelen. er tvært af- 

 kuttet i Enden, med Sidehjørnerne udtrukne i en konisk 

 fortilrettet Fortsats, forsynet med en liden Borste i Spidsen 

 (se Fig. 1 e). De 2 bagerste Kropssegmenter er fuld- 

 stændig sammenvoxne og kun antydede ved de fra dem 

 iidgaaende Sidefortsatser, hvoraf det sidste Par som sæd- 

 vanlig er kortere og mere bagudrettet. Halesegmentet, 

 der heller ikke er tydeligt afgrændset fra Kroppen, er 

 meget smalt, cylindriskt, og af betydelig Længde, omtrent 

 som Hovedsegmentet, samt horizontalt, endende i en stump 

 Spids. 



Uieknuden (se Fig. 1 b. 1 c. 1 e), der er beliggende 

 helt fortil, nær Enden af Pandedelen. er af betydelig Stør- 

 relse og stærkt ophoiet. Den er noget forover rettet og 

 af cylindrisk Form, med et ganske kort kegleformigt Frem- 

 spring i Midten af den stumpt afrundede Ende. Lindserne 

 er forholdsvis smaa og beliggende helt ved Toppen af Øie- 

 knuden. 



Snabelen (se Fig. lb. le. Id) udgaar noget ventralt 

 fra Hovedsegmentets Ende og er meget skarpt afgrændset 

 fra samme, idet der omkring dens Basis tindes en fortykket 

 circulær Kant (se Fig. 1 d), hvorved paa en Maade en 

 Slags Ledforbindelse kommer istand. Den er af betydelig 

 Størrelse; over halvt saa lang som det øvrige Legeme, og 

 ialmindelighed mere eller mindre skraat nedadrettet. Af 

 Form er den udpræget tendannet. idet den ved Basis har 

 en stærk Indknibning og successivt udvides til henimod 

 Midten, hvorfra den igjen hurtigt afsmalnes mod Enden, 

 sum er stumpt tilspidset. Som hos andre Pycnogonideer 

 er den sammensat af 3 Længdesegmenter, hvoraf det upar- 

 rede og smaleste indtagér Dorsalsiden, de 2 øvrige en Del 

 af Sidefladerne og hele Undersiden, hvor de støder sammen 

 langs efter Midten (se Fig. 1 d). Mellem Segmenterne 

 tindes tætte tværgaaende Muskler, der især i det basale 

 Parti af Snabelen er tydelige. Muudaabningen, der ligger 

 paa Spidsen, er begrændset af 3 tydeligt fremspringende 

 Læber. 



Saxlemmerne er hos det voxne Dyr (se Fig. 1 b. 1 c) 

 yderlig smaa og rudimentære, neppe længere end Øieknuden 

 er hoi. og festede temmelig nær sammen til den forreste 

 Rand af Hovedsegmentet ovenover Snabelens Basis. Skaftet 

 er (se Fig. 1. f) af kølledannet Form og gaar ved Enden 

 oventil ud i en temmelig stærkt fremspringende, i Spidsen 

 tvekloftet Fortsats besat med 2 pigformige Borster. Ende- 

 partiet, der svarer til Haandén hos andre Pycnogonideer, 

 ha r kun Formen af et lidet kugleformigt Led, uden nogen 

 Antydning til Fingre. Ved stærk Forstørrelse kan dog 



tjnetly demarcated, both from the cephalic segment as 

 well as the succeeding portion of the trunk; there is, 

 otherwise, no distinct segmentation to be noticed on the 

 body. The lateral processes (s'ee fig. 1 b) are pretty thick, 

 almost clavate, and have at the extremity above 2 equally 

 developed spiniform processes, each terminating in a stiff 

 bristle. The cephalic segment occupies not quite '/ 3 of 

 the length of the body and is almost uniform in thick- 

 ness, without any distinct neck. Its anterior portion, or 

 the frontal part, is truncated at the extremity, with the 

 lateral corners drawn out to a conical process, directed 

 forwards and furnished with a small bristle at the point 

 (see fig. 1 e). The 2 posterior segments of the the trunk 

 are completely coalesced and only indicated by the lateral 

 processes that issue from them, of which the last pair is, 

 as usual, shorter and more posteriorly directed. The caudal 

 segment, which, also, is not distinctly demarcated from 

 the trunk, is very narrow, cylindric, and of considerable 

 length. about the same as the cephalic segment, horizontal, 

 and terminates in a brant point. 



The ocular tubercle (see fig. lb, le, 1 e), which 

 is situated quite in front, near the end of the frontal 

 part, is of considerable size and strongly protuberant. It 

 is directed forwards a little and is cylindric in form. with 

 a quite short conical prominence in the middle of the 

 bluntly rounded extremity. The lenses are relatively small, 

 and situated quite at the top of the tubercle. 



The proboscis (see fig. 1 b. 1 c. 1 d) issues some- 

 what ventrally from the end of the cephalic segment, and 

 is very distinctly demarcated from it, as round its base 

 there occurs a thickened circular edge (see fig. 1 d) by 

 which there is, in a manner, formed a kind of articulatory 

 connection. It is of considerable size, more than half 

 as long again as the rest of the body, and, usually, is more 

 or less directed obliquely downwards. In shape it is dis- 

 tinguished fusiform. as at its base it has a strong con- 

 striction and is progressively expanded towards the middle, 

 whence it again rapidly diminishes towards the extremity, 

 which is bluntly painted. As in other Pycnogonids it is 

 composed of 3 longitudinal segments, of which the un- 

 paired and narrowest occupies the dorsal side, the 2 others 

 a portion of the lateral surfaces and the entire under side 

 where they unite along the middle (se fig. 1 d). Between 

 the segments closely placed transversal muscles are found, 

 which are especially distinct in the basal portion of the 

 proboscis. The oral aperture. which is situated at the 

 point, is bordered by '■'> distinct protruding lips. 



The chelifori are, in the adult animal (see fig. 1 li. 

 1 c), extremely small and rudimentary, scarcely longer 

 than the ocular tubercle is high, and are secured pretty 

 closely together to the foremost margin of the cephalic 

 segment above the base of the proboscis. The scape is 

 (see fig. 1 f) clavate in form and at the extremity, above, 

 passes into a pretty strongly prominent process, bifivr- 

 cated at the point and beset with 2 spiniform bristles. 

 The terminal part, which corresponds to the hand in other 

 Pycnogonids, has only the form of a small globular joint, 



