104 



Spermatozo, idetmindste var den ikke til at opdage. Ende- 

 lig tindes der ikke saa faa Celler, hvori kun Spermatozoens 

 Hoved er at iagttage, og dette er endog meget mindre end 

 paa de fuldt udviklede Sperruatozoer og synes at været 

 udgaaet fra Cellekjernen, der da [har afsnøret sig, hvilket 

 sidste dog kun er en Formodning. 



Nedenfor Testiklerne sees i det før omtalte, fri Læng- 

 debelte Æggestokkene . der i Bygning ikke ere væsentlig 

 forskjellige fra Actinidernes i Almindelighed ; de danne 

 lange, baandformige, npget sammenrullede Rør, hvori Æg- 

 gene ligge i forskjellige Udviklingsstadier, i Regelen to 

 og to sammen, Tab. XVI, Fig. 8 r. og i enkelte Æg 

 er Furingen allerede gjeunemgaaet og Embryonaldannelsen 

 begyndt. 



Svælgrøret er cylindrisk, temmelig foldet paalangs 

 og sandsynligvis forsynet med to Svælggruber. Som tid- 

 ligere antydet er der kun foretaget Tversnit igjennem den 

 halve Krop med Svælgrør, og paa dette Tversnit sees en 

 tydelig udpræget Svælggrube, tapetseret med lange Cylin- 

 derceller, der bære lange Pidske-Cilier (Geissel)"Tab. XVI. 

 Fig. 7 /;. imedens Siderne af Svælgrøret have kortere 

 Cylinderceller med finere Cilier. Den udvendige Flade af 

 Svælgrøret er som sædvanligt beklædt med Endothel. li^. 

 det, der beklæder hele G-astralhulheden. [mellem Endo- 

 thelcellerne, der beklæde Septa, Mesenterialfiiamenterne og 

 Genera tionsorgan erne tindes spredte Nematocyster, ligesom 

 der paa Svælgrørets indre Side. imellem Epithelcellerne, 

 tindes encellede Slimkjertler. 



Saavel i Svælgrøret som i Gastralhulheden fandtes 

 en hel Del Foraminiferer, ligesom der besynderligt nok 

 fandtes en Bladknop af en Sphagnum, der var berøvet alt 

 Protoplasma, saa at kun det smukt netformige, farveløse 

 Væv, der danner Oellevæggeue. var tilbage. Denne ~S\t<^r 

 knop maa vel være sunket ned paa dette store Dyb 

 (2742 Fod) fra en eller anden Strandbred, og er da om- 

 sider tornet ind i Dyrets Ernæringskreds, hvor den sammen 

 med Foraminifererne er slugt ned i Fordøielsestrakten. Hei- 

 er den sandsynligvis under Fordøielsesprocessen bleven be- 

 rovet Protoplasmaet, der er gaaet over i Ernæringsvædsken. 

 imedens det ufordøielige Cellulosevæv er blevet tilbage. 

 Det er høist rimeligt, at Bladknoppen er kommen ned i 

 Gastrovascularhulheden i temmelig frisk og uskadt Tilstand; 

 thi naar undtages, at et Blad var veget noget ud fra de 

 øvrige, befandtes den med Hensyn til Formen i uforandret 

 Tilstand. 



Fmdested. 

 Station 1(14. Et Exemplar. 



darker, have a richer protoplasmic contents. and these do 

 not appear to eontain anv spermatozoa, at all events none 

 could be detected. Finally. not a few cells are found in 

 which only the head of the spermatozoon eau be observed, 

 and tliis is even much less than in the fully develpped 

 spermatozoa, and appears to have proceeded from the cel- 

 lular nucleus, which has thus constricted itself, but that 

 is only a supposition. 



Below the testicles the ovaries are seen situated in 

 the longitudinal belt previously mentioned, and in structure 

 tliev are not essentially different from that of Actinidæ in 

 general; thev form long, ribbon-shaped, somewhat coiled 

 tubes, in which the ova lie in various stages of develop- 

 ment, generally two and two togather (Pl. XVI. fig 8 c); 

 in a few ova the segmentation bad already tåken place and 

 the embryona] formation begun. 



Tin' gullet-tube is cylindrical, somewhat folded longi- 

 tudinally, and is probably furnished with two gullet-grooves. 

 As previously stated. transversal section has only been 

 made throngh one half of the body and the gullet-tube, 

 and in this section a distinctly marked gullet-groove is 

 observed, coated with long cylinder-ceils carrying long 

 flagellate ciliæ Geissel) (Pl. XVI. fig. 7 &), whilst the 

 sides of tlie gullet-tube have shorter cyllinder-cells with 

 finer ciliæ. The exterior surface of the gullet-tube is. as 

 usual. elad with endothelium similar to that which clothes 

 the entire gastral cavity. Between the endothelial cells 

 that clothe the septa. tin- mesenterial filainents and the 

 reproductive organs, scattered uematocysts are found. whilst. 

 also. upon the inner side of the gullet-tube, between the 

 epithelial cells. unicellular mucous glands are found. 



In the gullet-tube also. as well as in the gastral 

 cavity. a large number of foraminifera were found. whilst 

 also. strangely enough. there was found a leaf-bud of a 

 sphagnum, deprived of all protoplasm, so that only the 

 beautiful, reticulated. colourless tissue that forms the walls 

 of the cells was left. That moss-bud must certainly have 



sunk to this great depth (457 fath.). and have proc led 



from sonie shore or other, and then been drawn within 

 the region of the animals feeding ground, where, to- 

 gether with the foraminifera. it has been drawn iuto the 

 digestive funnel. Here, it has probably during the process 

 of digestion been deprived of its protoplasm. which has 

 passed into the nutritory fluid, whilst the indigestible cel- 

 lular tissue has been left. It is extremely probable that the 

 leaf-bud has arrived in the gastro-vascular cavity in a pretty 

 fresh and undamaged condition, because, with the excep- 

 tion that a leaf bad separated a little from the rest. it 

 was found to be unclianged in form. 



Habitat. 



Station Xo. 1G4. One specimen. 



Slægtskarakter. 



Legemet cylindrisk. ormformigt, forsynet med 8 Læng- 

 defurer og Mellemrummene tat besatte med Sugevorter. 



Generic charaeteristics. 



The body cylindrical, vermiform. furnished with 8 

 longitudinal furrows and the intervals closely occupied liv 



