have en fuldkommen Meduseform (Fig. 27, 28), idet deres 

 Skive eller Kappe (p), som er ganske gjennemsigtig med 

 et svagt blegrødligt Anstrøg, er klokkeformig, næsten dob- 

 belt saa lang som bred, fortil eller i den ydre bredere 

 Ende noget skjævt afstudset, bagtil conisk eller efter- 

 haanden smalere *og gaaende over i en kort cylindrisk 

 Stilk (s), ved hvilken den er fæstet til den gemmebærende 

 Gren. Kundt om Kappens forreste, noget firkantede, 

 skjævt afstudsede Rand sidde i lige Afstand fra hver- 

 andre 4 fremragende Knuder (Tentakelbulbi) af mørk 

 rosenrød Farve. De 3 af disse Knuder (d) ere kugle- 

 formige og af lige Størrelse, medens den fjerde (e), som 

 sidder paa den mest fremragende Del af den skjæve Kappe- 

 rand, er dobbelt saa stor og forlænget til et smalere, 

 cylindrisk i en lidt tykkere rund Knop (/") endende Ved- 

 hæng, som er mere end halvt saa langt som Kappen og 

 aabenbart maa betragtes som en fremvoxende Tentakel 

 eller saakaldet Randtraad. Formodentlig har denne Rand- 

 traad, som her er beskrevet efter Spiritusexemplarer, i 

 levende Live været meget længere. Den staar iøvrigt 

 aldrig lige ud eller lodret paa Kapperanden, men altid 

 noget skraat udad rettet, saa at den danner en Vinkel 

 med denne. 



Fra hver af de 4 Randknuder (Tentakelbulbi) løber 

 en af talrige meget smaa Pigmentkorn rødlig farvet Canal 

 (c) langs ad Kappens indre Flade bagtil hen til Basis af 

 den store ovale eller flaskeformige mørkrødlige Mave (b) 

 (Proboscis, Manubrium), der ligesom Kolben i en Klokke 

 rager frit frem i Kappens Hule (Svømmehulen), som den 

 ikke er meget langt fra at udfylde, og kun befæstet bagtil 

 ved dens noget smalere Basis. En Ringcanal (g) langs 

 ved Kappens forreste Rand forbinder hine 4 Radiærcanaler 

 med hverandre, og disse communicere bagtil med Mavens 

 Hule og den derfra ind i Stilken, ved hvilken Gemmen 

 er befæstet, løbende Canal ("chord" Forbes), gjennem 

 hvilken Gemmen tilføres den til dens Ernæring fornødne 

 Vædske fra den gemmebærende Grens Hule. Alle 4 Rand- 

 knuder indeholde en Hule, som communicerer saavel med 

 Ringkanalen som med Radiærkanalerne og ligeledes stræk- 

 ker sig ind i den forlængede Randtraad. I Huden af 

 disse Knuder findes ogsaa talrige runde Nesselkapsler 

 indleiede. Paa den frie Ende af Maven var endnu ingen 

 Mundaabning at bemærke. 



Saaledes vare de største, mest udviklede Gemmer 

 (Fig. 27, 28 a 1 '), hvilke hyppig viste selvstændige acaleph- 

 agtige Bevægelser, en oftere gjentagen hæftig Systole og 

 Diastole af Kappen for at løsrive sig og blive fri. Den 

 eneste Randtentakel var her, som man ser, mere udviklet 

 end hos de af mig forhen (1. c, Tab. 1, Fig. 3, f, g) iagt- 

 tagne og afbildede Medusegemmer. De mindre Gemmer 

 (Fig. 28, a') viste kun en enkelt ganske kort, tyk og but 

 tilrundet Knude (den Iremvoxende Randtraad) paa Kappens 

 forreste Rand og endnu intet Spor til de 3 övrige Knuder, 

 og de mindste (a) (10—15 Gange mindre end hine mest 



They have a complete Medusa-form (üg. 27, 28); their 

 disc or umbrella (p) which is quite transparent, with 

 a slight pale reddish tint, being bell-shaped, nearly 

 twice as long as wide ; in front, or at the wider extremity, 

 somewhat obliquely terminated, and conical behind, or 

 gradually tapering to a short cylindrical stalk (s) by which 

 it is attached to the reproductive branch. Round about 

 the anterior somewhat square obliquely terminated border 

 of the mantle, there are 4 equidistant prominent tubercles 

 (tentacle-bulbs) of a dark rose color. Three of these 

 tubercles (d) are globular and of equal size, while the 

 fourth (e), situated on the most prominent part of the 

 oblique border of the umbrella, is twice as large, and 

 lengthened out to a thinner cylindrical appendage, which 

 terminates in a round knob (f) and is more than half as 

 long as the umbrella, appearing clearly as a growing ten- 

 tacle or so-called marginal filament. Probably this mar- 

 ginal filament, which is here described according to a 

 spirit specimen, was much longer in the living animal. 

 It never stands straight out, or perpendicularly on the 

 border of the umbrella, but always somewhat inclined 

 outwards, so as to form an angle with it. 



From each of the 4 marginal tubercles (tentacle-bulbs) 

 there is a canal (c), tinted red by numerous very small 

 pigmentary granules, running along the interior surface 

 of the umbrella to the base of the large oval or bottle- 

 shaped dark reddish stomach (b) (proboscis manubrium), 

 which, like the clapper of a bell, projects freely in the 

 cavity of the umbrella very nearly filling it, and is only 

 fixed at the somewhat more slender base. A circular 

 canal (g) around the anterior border of the umbrella 

 connects the 4 radial canals with each other; 'these com- 

 municate with the cavity of the manubrium and with the 

 canal ("chord" Forbes) that runs thence into the stalk 

 to which the gonozooid is attached, conveying from the 

 cavity of the reproductive branch, the liquid required for 

 the nourishment of the gonozooid. All the 4 marginal 

 tubercles contain a cavity, which communicates with the 

 circular canal as well as with the radial canals, and like- 

 wise extends into the elongated marginal filament. Numer- 

 ous round thread-cells are also found imbedded in the 

 skin of these tubercles. At the free extremity of the 

 manubrium no oral aperture could yet be perceived. 



Such were the first and most developed gonozooids 

 (fig. 27, 28 a") which frequently showed independant 

 acalephic movements, a more frequently repeated violent 

 systole and diastole of the umbrella in order to discon- 

 nect themselves and to become free. The single margi- 

 nal tentacle was here, as may be seen, more developed 

 than in the gonozooids previously observed and delineated 

 by me (1. c, Tab. 1, fig. 3, f. g.) The smaller gonozooids 

 (fig. 28. a') showed only a single tubercle quite short, 

 thick and obtusely rounded (the growing marginal fila- 

 ment) on the anterior border of the umbrella, and no 



