18 



mange, og paa disse ere Kjønsorganerne fæstede, som ere 

 mere eller mindre udviklede Æggestokke. Disse indtage 

 paa Septum et aflangt Ruiu imellem Længdemuskelens fri 

 Rand og Mesenterialfilamentet og danne en temmelig fast, 

 halvgjeimemsigtig Membran, egentlig Forlængelse af Sep- 

 tums Bindevæv, hvori Æggene sees indleirede, Tab. VIII. 

 Fig. 1 1 . De ere nresten runde, have en noget excentrisk 

 liggende Kimblære, som er omgiven af et temmelig tykt 

 Lag Blommekorn. Men i de fleste Æg er der foregaaet 

 en Differentiering, som er ganske mæfkelig, idet Blommen 

 er omgiven af et protoplasmatisk Net. der kun fremtræder 

 tydeligt paa yderst tynde Tversnit, Tab. VIII, Fig. 10. 

 Senere former dette Net sig i stavformige Legemer, der 

 ligge parallelt ved Siden af hverandre, men udbrede sig 

 som en Vifte over Blommen og skjuler den ganske. Disse 

 Protoplasmastave ere smalest der, hvor Ægget hviler i 

 Ovariallamellen, men bliver bredere og tykkere, jo hengere 

 de strække sig opover Ægget, Tab. VIII, Fig. 11 « ; de 

 tarves stærkt af Boraxkarmin, uden at det er muligt at op- 

 dage nogensomhelst Cellestruktur. Et lignende Forhold 

 omtales i Brødrene Hertwigs Afhandling over Actinierne '. 



Farven: Kroppen og Fodskiven er perlemorglind- 

 sende hvid, spillende svagt i det Rosenrøde. Mundskiven 

 smuk Laxerød med lidt mørkere Straaler, der udgaa fra 

 Mundaahningen. Tentaklerne lidt lysere end Mundskiven. 



Findested. 

 Station 255. Et Exemplar. 



Slægtskarakter. 



Fodskiven bladformet udvidet, omfattende tynde. runde 

 Gjenstande (Grene af Mopsia borealis). Kroppen dannende 

 en rund Soile, ribbet paalangs og forsynet med Cinclides. 

 Mundskiven dækkes af Kroppens Rand. Tentaklerne korte. 

 retraktile, faatallige, stillede i 1 eller 2 Rækker. 6 Par 

 fuldstændige Septa. Mesodermale Cirkulærmuskler. 



Artskarakter. 



Fodskiven aflang, 34""" lang. omfattende en Gren af 

 Mopsia borealis; dens Rand har 24 temmelig udprægede 

 Folder. Kroppen er cylindrisk, ribbet paalangs med 24 

 Folder; imellem disse ligesaamange Furer, hvori hist og 

 her Cinclides; dens øverste Rand er tyk. tentakulær og 



1 Oscar und Richard Hertwig. Die Actinien. Jenaische 

 Zeitschrift fur Naturwissenschaft 13 B. pag. 551. Jena 1879. 



septa are numerous, and on them the reproductive organs 

 are attached, and consist of more or less developed ovaries. 

 These occupy an oblong space on the septum, between the 

 free margin of the longitudinal muscle and the mesenterial 

 filament, and form a rather tinn. semitransparent membrane, 

 really a prolongation of the septal connective-tissue, in 

 which the ova are seen to he embedded (Pl. VIII. fig. 11). 

 They are almost round, have a somewhat eccentrically 

 placed germinative-sac surrounded by a pretty thick laver 

 of yoke-granules. But in most of the ova a differentiation 

 has tåken place which is quite remarkable, as the yoke is 

 seen to be surrounded by a protoplasmic reticulation, which, 

 however, only appears distinctly in extremely thin transverse 

 sections (Pl. VIII. rig. 10). This reticulation subsequently 

 grows into rod-like bodies that lie adnately to each other, 

 but distribute themselves in flabelliform over the yoke and 

 completely conceal it. These protoplasmic staves are nar- 

 rowest at the point where the ovum rests in the ovarial 

 lam ella, hut become broader and thicker the farther they 

 extend U[i over the ovum (Pl. VIII, fig. 11 a). They are 

 strongly colourable by Borax-carmine, without it being pos- 

 sible to detect any cellular structure whatsoever. Similar 

 relations are mentioned in the Brothers Hertwig's Memoir 

 on the Actinaria '. 



The colour: The body and the pedal disc have a 

 shining mother-of-pearl white colour. tinged faintly with 

 rose-red. The oral disc has a beautiful salmon-red colour. 

 with somewhat darker ravs issuing ironi the oral aperture. 

 The tentacles are a Little Lighter in colour thai) the oral disc. 



Habitat. 

 Station No. 255. One specimen. 



Generic eharacteristics. 



The pedal disc membranaceously expanded, enclasps 

 thin. round objects (branches of Mopsia borealis). Tin- 

 body forms a round pillar. is longitudinally ribbed, and 

 furnished with cinclides. The oral disc covered by the 

 margin of the body. The tentacles short. retractile, not 

 numerous, placed in 1 or 2 series. G pairs of perfecl 

 septa Mesodermal circular muscles. 



Specific eharacteristics. 



The pedal disc oblong, 34""" in length, enclasps a 

 branch of Mopsia borealis; its margin has 24 rather pro- 

 minent folds. The body is cylindrical, longitudinally ribbed, 

 has 24 folds: between these a similar number of furrows in 

 which, heiv and there, cinclides observable; its uppermost 



1 Oscar und Richard Hertwig. Die Actinien. Jenaische 

 Zeitschrift lur Naturwissenschaft 13 f!, pag. 551. Jena 1879. 



