

45 



mindre Exemplarer derimod meget bleg orangegulagtige, 

 De ved Eoden af disse Følere fæstede accessoriske Fang- 

 traade (f f) vare hos det levende Dyr meget stærkt for- 

 længede, naaede næsten til Enden af Følerne og bøiede 

 sig paa forskj ellig Vis ofte i flere Spiraler. Sugerørene 

 (aaa) og Generationsklaserne viste ialmindelighed den oven- 

 for udførligt beskrevne Form og Bygning og vare paa det 

 levende Dyr af en lys gulagtig Farve. Derimod viste de 

 egentlige Fangtraade (tt) sig langt mere udviklede end paa 

 mine Exemplarer fra Bodø og vare tilstede i et meget be- 

 tydeligt Antal. Paa det levende Dyr frembøde disse Fang- 

 traade et uforligneligt Syn ved sit stadigt vexlende Spil, 

 idet de afvexlende og med stor Hurtighed paa forskjellig 

 Vis forkortede sig og igjen strakte sig ud, hvorved de kunde 

 opnaa en Længde mere end 3 Gange saa stor som hele 

 Coloniens Axe. Nesselknopperne, der i stor Mængde vare 

 med korte Mellemrum fæstede langs hele Fangtraaden til 

 temmelig korte og tynde Sidegrene (Fig. 5), viste hos alle 

 3 Exemplarer paa den inderste Del den af mig ovenfor 

 beskrevne Form og Bygning, idet de største af dem ere 

 elliptiske med but tilrundet Spids og indslutte en i 4 eller 

 5 skrueformige Spiraler eller Vendinger dreiet Streng (det 

 saakaldte Nesselbaand). Længere ud paa samme findes 

 der Nesselknopper, der vel ere noget mere langstrakte, 

 men dog vise en meget lignende elliptisk Form, og i hvilke 

 Nesselbaandet beskriver 6 eller 7 Vendinger (Fig. 6). Paa 

 hele den øvrige eller ydre Del af Fangtraadene have deri- 

 mod Nesselknopperne en meget forskjellig Form, der mere 

 stemmer overens med samme hos de middelhavske Arter 

 P. hydrostatica og P. Philippii. De er her nemlig (Fig. 5, 

 u, Fig. 7) af omvendt pæredannet Form, tykkest ved Basis 

 og efterhaanden afsmalnende mod Enden, der gaar ud i en 

 tynd med smaa tilspidsede Fortsatser besat Spids. Den 

 indsluttede Nesselstreng er ikke længere oprullet i de re- 

 gelmæssige spiraldreiede Vendinger som paa de yngre Nes- 

 selknopper, men ligger nu uordentlig sammenslynget i flere 

 uregelmæssige Bugter. Den indre Hule (Fig. 7, b 1 b 1 ) paa 

 disse Nesselknopper indtager ogsaa et meget mindre Rum 

 end paa de mindre udviklede, hvorimod den ydre Kapsel 

 (b), der nu synes at bestaa af flere Lag, har betydelig til- 

 taget i Tykkelse. Kun paa et Punct nær ved Basis, hvor 

 den ene Ende af Nesselstrengen fæster sig til Kapselens 

 Væg, og hvorigjennem Næsselstrengen rimeligvis tilsidst 

 finder sin Udvei, har Kapselen bibeholdt sin oprindelige 

 Tyndhed; der synes her endog at være en liden Aabning i 

 Kapselens Væg, antydet ved en mørkere Plet (d). Spræn- 

 ges Kapselelen paa en af disse Nesselknopper, retter Nes- 

 selstrengen sig ved sin Elasticitet strax mere eller mindre 

 fuldstændigt ud (Fig. 8), og de 2 muskuløse Baand (yy), 

 der forbinde begge Ender af samme og som i Begyndelsen 

 ligesom Nesselsrengen selv har været spiraldreiet følgende 

 nøiagtig dennes forskjellige Vendinger, træde nu tydeligt 

 ud fra samme. Paa den Ende af Nesselstrengen, der for- 

 binder sig med Kapselens Væg, ere begge disse Strenge 

 fæstede tæt sammen til dennes yderste Spids, medens de 

 paa den modsatte med de store elliptiske Nesselceller for- 



mens very pale orange-yellowish. The accessory filament 

 attached at the root of these feelers (/ l f l ) were in the 

 living animal very strongly elongated, reaching nearly to 

 the end of the feelers, and were twisted in various 

 manners, often in several spirals. The suction-tubes {aaa) 

 and the generative clusters exhibited generally the above 

 minutely described form and structure, and were in the 

 living animal of a light yellowish color. But the proper 

 tentacles (tt) appeared far more developed than in my 

 specimens from Bodo, and were present in very consider- 

 able numbers, In the living animal these tentacles presented 

 a very beautiful spectacle by their continually varying play; 

 alternately and with the greatest rapidity shortening them- 

 selves and in various manners stretching themselves out 

 again, whereby they could attain a length more than 3 

 times as great as that of the whole colony. The urticary 

 knobs, which in great numbers and at small intervals were 

 fixed all along the tentacle to rather short and thin lateral 

 branches (fig. 5), exhibited in all 3 specimens on the interior 

 part the form and structure above described by me; the 

 largest of them being elliptical with an obtusely rounded 

 point, and containing a chord (the so-called urticary band) 

 twisted in 4 or 5 screw-like spirals or coils. Further out on 

 the tentacles there are urticary knobs which are indeed some- 

 what more elongated, but yet shew a very similar elliptical form; 

 and in these the urticary band describes 6 or 7 turns (fig. 6). 

 On the whole remaining or exterior part of the tentacles 

 the urticary knobs have on the contrary a very different 

 form, which more agrees with that observed in the Medi- 

 terranean species P. hydrostatica and P. Philippii. They 

 are here (fig. 5 u. iig, 7) inversely pear-shaped, thickest at 

 the base, and gradually tapering to the extremity, which 

 terminates in a thin point covered with small pointed pro- 

 cesses. The enclosed urticary chord is no longer twisted 

 in regular spiral coils, as in the younger urticary knobs; 

 but now lies loosely convolved in many irregular bends. 

 The interior cavity (fig. 7 b l b 1 ) in these urticary knobs oc- 

 cupies also a much smaller space than in those less deve- 

 loped, while on the contrary the exterior capsule (b) which 

 now seems to consist of several layers, has become consi- 

 derably thicker. Only in one point near to the base, where 

 one end of the urticary chord is attached to the wall of 

 the capsule, and through which the urticary chord pro- 

 bably finds at last its exit, the capsule retains its original 

 thinness; there seems at this point to be even a small ope- 

 ning in the wall of the capsule, indicated by a darker spot 

 (d). If the capsule of one of these urticary knobs is rup- 

 tured, the urticary chord straightens itself immediately by 

 its own elasticity more or less completely (fig. 8) and the 

 two muscular bands (yy) which connect both ends of it 

 and which at first, like the urticary chord itself, were spi- 

 rally twisted, following exactly its various windings, stand 

 out from it in distinct relief. At the end of the urticary 

 chord that is connected with the wall of the capsule both 

 these bands are attached, close together, to its extreme 

 point, while at the opposite end, where are the large el- 



