ning. Disse Legemer lindes ikke i Svælggruben og ere 

 upaatvivlelig encellede Slimkjertler. 



Øverst paa den indre Svælgflade, strax førend Renden 

 tager sin Begyndelse, lindes paa Bugsiden under eller uden- 

 for Epithellaget, imellcm dette og Bindevævslaget og lige- 

 som bundet til det første, en Gruppe store, aflange Celler 

 med en overordentlig stor Kjerne med Kjernelegeme og 

 omgiven ar en rig Protoplasmamasse, Fig. 25, b. 31. Fra 

 den forlængede Del, der vender til Epithelet, i\dspringer en 

 Udløber, Fig. 25. 31, som forsvinder imellem Epithelcellerne. 

 Den anden, indre, afrundede Ende at' Cellen synes ikke 

 at neisende nogen Forlængelse. Jeg maa betragte disse 

 store Celler som tilhørende Nerveapparatet og tor at være 

 unipolære Ganglieceller. Imellem og under dem sees enkelte 

 smaa, runde, temmelig klare Celler med en rund Kjerne, 

 omgiven af Protoplasma, Fig. 25, c, hvilke ikke kunne hen- 

 føres til Epithelceller, men som muligens staa i Forbindelse 

 med disse og kunne være Epithelnerveceller. At de til- 

 høre Nervesystemet forekommer mig meget sandsynligt, 

 især da længere nede paa Svælget [lignende Celler træffes 

 imellem Epithel- og Bindevævslaget og her hviler paa yderst 

 fine Fibriller (Nervestrænge?), som ikke synes at henhøre 

 til Bindevævet. Jeg har ikke kunnet forfølge Nervesystemet 

 videre; thi Materialet har for Størstedelen været opbevaret i 

 Alcohol, hvorfor der vanskelig lader sig gjøre Macerations- 

 præparater af det. 



Musklerne paa Svælget danne et Lag af lidt paaskraas 

 gaaende, cirkulære Fibre, der ligge paa dets udvendige 

 Blade, imellem Entodermlaget og Bindevævet. 



Fra Svælgets nederste, fri Ende udgaa de sædvanlige 

 8 G-astralfilamenter, hvoraf de to længste ere fæstede til de 2 

 dorsale Septula og følge disse til Mavehulhedens Bund. De 

 øvrige 6 ere kortere og frithængende. Samtlige ere dan- 

 nede af en temmelig fast, hyalin Bindevævsmembran, der 

 paa begge Sider er beklædt med Epithel, som paa de 6 korte 

 bestaar af Entodermceller, lig dem paa Svælgets ydre Flade, 

 imedens det paa de 2 lange bestaar af langstrakte Celler, 

 lig det indre Lag af Ectodermcellerne, der tidligere ere be- 

 skrevne. 



Kjønsprodukterne udvikles i den forlængede Mave- 

 hulhed, væsentligst paa de ventrale Septula. Kun Æg har 

 jeg seet, og i Regelen kun et i hver Kapsel 



Tentaklerne ere udvendigt beklædte med et Ectoderm, 

 bestaaende af to Lag Celler, af hvilke de i det yderste Lag 

 ere polyædriske, imedens de i det indre ere mere aflange 

 og rigere paa Protoplasma, Fig. 32, a. 



Cellerne ere af omtrent samme Størrelse som Polyp- 

 kroppens Ectodermceller. Indenfor Epithelet er et hyalint 

 Bindevævslag paa hvis ydre, aborale Flade sees en Mængde 



found in the gullet-cavity, and are, without doubt, uni- 

 cellular mucous glands. 



On the uppermost part of the inner surface of the 

 gullet, just before the channel begins, there is found on the 

 ventral side, below, or outside of, the epithelial layer and 

 between it and the connective tissue layer, adherent, as 

 it were, to the tirstnamed, a group of large oblong cells, 

 containing an extremely large nucleus with its nucleus body 

 surrounded by a rich protoplasmic substance, (PI. I, fig. 25 b, 

 31). From the prolonged part, that faces the epithelium, a 

 prolongation springs, (PL i, figs. 25. 31), which however 

 disappears again between the epithelial cells. The other, more 

 rounded, extremity of the cell does not appear to send out 

 any prolongation. I must consider these large cells as 

 pertaining to the nerve apparatus, and as being unipolar 

 ganglial cells. Between them, and under them, a few min- 

 ute, cylindrical, rather translucent cells are visible, which 

 contain a round nucleus surrounded by protoplasm, (PI. I, 

 fig. 25, c), but, which cannot be assigned to the epithelial 

 cells, although they, possibly, are placed in connection with 

 them and may be epithelial nerve- cells. That they pertain 

 to the nerve system appears, to me, very probable, especially, 

 because further down on the gullet, similar cells are met 

 with between the epithelium and the connective-tissue layer 

 resting, here, on extremely minute fibrils (Nerve-cords) 

 which do not appear to belong to the connective-tissue. 

 1 have not been able to follow up the nerve system, 

 further, as my material has, for the greater part, been pre- 

 served in alchohol and, from this, it is difficult to make 

 macerated preparations. 



The muscles of the gullet form a layer of, somewhat 

 diagonally-running, circular fibres, which are placed upon 

 its exterior surface between the entoderm layer and the 

 connective-tissue. 



From the lowest free extremity of the gullet, the 

 usual 8 gastral filaments proceed, of which, the two longest 

 ones are adherent to the two dorsal septula and follow them 

 to the bottom of the ventral cavity. The other 6 are shorter, 

 and freely pendulous. All of them are formed of a rather 

 firm, hyaline connective-tissue membrane, which is clad on 

 both sides whith epithelium, which upon the 6 shorter ones 

 consists of entoderm cells like those upon the gullets 

 exterior surface, whilst upon the two long ones, it consists 

 of elongate cells like the inner layer of ectoderm-cells 

 , which hås previously been described. 



The sexual products are developed in the prolonged 

 ventral cavity, principally on the ventral septula. I have 

 only discovered ova, and, generally, only one ovum in each 

 capsule. 



The tentacles are, exteriorly, clad with an ectoderm 

 consisting of two layers of cells, of which, those in the 

 exterior layer are polyhedrical, whilst those in the inner 

 layer are more oblong, and richer in protoplasm, (PL I, 

 fig. 32, a). 



The cells are of about the same size as the ectoderm- 

 cells of the body of the polyp. Inside the epithelium, 

 there is a layer of hyaline connective-tissue on whose exterior 



