en Mængde kolbeformige Slinikjertler med en langstrakt 

 Hals. der som oftest udnmnder paa Svælgets indre Flade, 

 Fig. 7. e. Disse Kolbeceller ere ganske lig de føromtalte, 

 encellede Slimkjertler i Ectodermet; men i Svælget ere de 

 lettere at iagttage, ligesom Tndholdet ofte ligger dels i. 

 dels udenfor Udførselskanalens Aabning. Svælgets indre 

 Flade er ofte overtrnkken med en seig Slimmasse. 



Svælggruben danner en oval Rende, der strækker sig 

 nogle Millimeter fra den aflange Mundaabning og lige ned 

 til Svælgets Ende. Fig. 7. /. Den er forsynet med lange, 

 smale Pidskeceller, som hver bærer en lang Cilie. der 

 flimrer frit i Hulheden, Fig. 7. g. 



Gastraltilamenterne afvige ikke i sin Bygning fra 

 dem. jeg omtalte hos Slægten Vceringia, og hvorved jeg for 

 en Del kan konstatere de af Englænderen Edm. Wilson 

 gjurte Tagttagelser, betræffende de to lange Dorsal-mesen- 

 terialtilamenters Bygning. Hvorvidt disse to Organer 

 adelukkende staa i Circulationens Tjeneste, kan jeg ikke 

 afgjore; men den Omstændighed, at de følge Mavehulheden 

 i dens hele Længde og ere rigt beklædte med lange 

 Cilier. synes at tale derfor. 



Kjønsprodukterne udvikle sig i den nederste Del af 

 Mavehulheden paa Septula i særegne Kapsler. Kjønnene 

 ere adskilte. Paa det ene Exemplar. jeg har havt til 

 Ondersøgelse, ere Individerne Hunner. 



Jeg har tidligere omtalt, at der overalt i Zoantho- 

 demets ydre Hud tindes en Mængde Spikler; jeg skal nu 

 nærmere beskrive disse. 



I Basaldelen ligge Spiklerne kompakt paa hverandre 

 og danne dels bladede. dels vortede Klubber med yderst 

 kort Haandgreb, fra 0.110—0.140""" lange og fra 0.060 

 _0.080"™ brede foroven, Fig. 8. 9. 10; korte, takkede 

 Spindler med afstumpede Ender, fra 0.060—0.120™" lange, 

 og fra 0.025—0.040""" brede; de mindste have faa Takker 

 med et bredt, nøgent Midtbelte. Fig 11; smaa Dobbelt- 



stjerner, 0.052""" lange. 0.020""" brede i Enderne og 0.010 



brede paa Midten. Fig. 12; større Dobbeltstjerner med et 

 Midtbelte dels nøgent, dels besat med Takker og 0.112 

 lange. 0.060""" brede i Enderne; hyppigt er den ene Ende 

 bredere end den anden og rigere paa Takker. Fig. 13. l-t. 15. 



Paa Stammen ere Dobbeltstjerner den hyppigste 

 Spikelform; de ere fra 0.060—0.088""" lange og fra 0.040 

 — 0.060" 1 " 1 brede i Enderne: det nogne Midtbelte er fra 

 0.016—0.020""" bredt, Fig. 16, 26; de træffes i forskjellige 

 Udviklingsstadier og ere da af meget forskjellig Størrelse, 



however. somewhat miodified, inasmucb that the eells 

 are more elongate and not so polyhedrical and. between 

 them. a multitude of elavate-formed mucous glands are 

 observed, ha ving an elongated neck vhich. most frequently, 

 debouches on the inner surface of the gullet (fig. 7. e). 

 These clavate cells are quite similar to the previously 

 mentioned unicellular mucous glands in the ectoderm, 

 but they are more easily observed in the gullet, whilst. 

 also. the eontents frequently lie. partly inside, anil partly 

 outside the aperture of the excretory duct. The inner 

 surface of the gullet is. frequently. coated with a viscous 

 mucous substance. 



The gullet cavity forms an oval channel, which ex- 

 tends itself, a few millimetres from the oblong oral aper- 

 ture. right down to the extremity of the gullet (fig. 7. /). 

 It it furnished with. long, narrow. flagellated cells, each 

 of which carries a long cilium that waves freely in the 

 cavity (flg. 7. g). 



The gastral filaments do not differ in their structure 

 from those spoken of in connection with the genus Vceringia, 

 and from this i can. in a measure, confirm the obser- 

 vations made by the Englishman Edm. Wilson, in respecl 

 of the two long dorsal mesenterial filaments. How far 

 these two organs operate, exclusively, in the service of the 

 circulatory system. 1 am unable to decide, but the cir- 

 cumstance that they follow the ventral cavity throughout its 

 entire length, and are richly clad with long ciliæ, seems 

 to point to this. 



The sexual products develope themselves in the lowest 

 part of the veutral cavity. on the septula. in peculiar 

 capsules. The sexes are separate. In the one specimen which 

 I have had under examination the individuals are females. 



I have previously statcd that. everywhere, in the 

 exterior integument of the Zoanthodem, a multitude of 

 spicules ar found; I shall now describe these more par- 

 ticularly. 



In the basal part. the spicules are placed com- 

 pactly upon each other. and form; partly, foliaceous, 

 partly, warted [clavates with extremely short shaft, and 

 they measure from 0.110 — 0.140""" in length. and from 

 0.060—0.080""" in breadth above (figs. 8. 9. 10); short 

 spicate fusees with blunted extremities, and measuring 



from i i.t Mii )— o.l 2o in length. and from 0.025—0.040™ 



in breadth; the smallest ones have few spikes, and have 

 a bruad bare mesial belt (fig. 11); small bistellates, 

 measuring 0.052""" in length. and 0.020™™ in breadth at 

 the extremities. and 0.010'""' in breadth at the middle 

 (fig. 12); large bistellates. with a mesial belt, partly. 

 bare. partly beset with spikes, and measuring 0.112""" in 

 length. and 0.O60""" in breadth at the extremities; very 

 frequently. the one extremity is broader than the other. 

 and richer in spikes (figs. 13. 14. 15). 



< hi the stem. the bistellate is the most frequent 

 spicular form. and measures frem 0.060 — 0.088™™ in length. 

 and from 0.040 — 0.060™™ in breadth at the extremities; 

 its bare mesial belt measures from 0.016—0.020™™ in 

 breadth (figs. 1(3. 26); they are met with in various stages 



