15 



Randen, er den 2den Række, der ligeledes har 8. men 

 aoget mindre end de foregaaende, og endelig er den 3die 

 Række stillet iinellem den 2deu Række og Kroppens øverste 

 Rand, hvilken har 16 Tentakler, som ere meget •mindre 

 end de øvrige. Tentaklerne have paa hele deres ydre Væg 

 tætstaaende, yderst smaa, hvidagtige Papiller, der dog 

 kunne iagttages med blotte Øie Og ere lig dem. som oven- 

 for ere omtalte ved Beskrivelsen af Kroppen og Skiven, 

 Tab. VII, Fig. 12. 



Kroppens udvendige Væg er beklædt med etEpithel, 

 bestaaende af lange Cylinderceller, forsynet med Cilier, 

 Tab. VII. Fig. 10 a, samt en stor Mængde Nematocyster, 

 der staa i Grupper og danne de tidligere beskrevne smaa, 

 hvide Papiller. Fig. 10 b. Neniatoeysterne synes kun at 

 beståa af et Slags, nemlig elliptiske, klare Kapsler, der 

 indeslutte en stærk, spiralbunden Traad. Imellem Epithel- 

 cellerne tindes encellede, flaskeformede Slimkjertler, som 

 ikke synes at være i nogen stor Mængde tilstede. Indenfor 

 Ectodermet er et bredt, hyalint Bindevævslag, i hvis Midte 

 tindes udbredte. cirkulære Muskler. Disse danne paa Tver- 

 snit eller rettere paa Skraasnit stjerneformige Figurer, der 

 fremstille de enkelte Fibriller. og som nok kunne forvexles 

 med Bindevævslegemer, rige paa Udløbere, men hvorfra de 

 adskilles baade ved Farvningen og ved deres fibrillære Na- 

 tur, Fig. U» c, som dog tydeligst viser sig paa Længdesnit. 

 Henimod Endothelbeklædningen er der et hyalint Belte, 

 hvori ingen Muskeltibre tindes, men hvor spindelformede 

 Bindevævsceller med Udløbere sees hist og her, Fig. 10 d. 

 Den indre Vægflade er tapetsere! med et Endothel, der 

 bestaar af meget lange Cylinderceller. forsynede med en 

 allaug Kjerne og en lang Pidske, Fig. 10 e. 



Der er 1 (3 Par fuldstændige Septa, som ere yderst 

 tynde og paa mange Steder perforerede; de gaa alle fra 

 Fodskiven og den indre Kropsvæg og fæste sig paa Mund- 

 skiven og Svælgroret. Disse Septa hære Mesenterialfila- 

 nienter og paa enkelte af dem sees længst ned imod Bun- 

 den af Gastralhulheden Generationsorganer. Imellem hver 

 2 Par af de fuldstændige, primære Septa iagttages 2 Par 

 secundære, ufuldstændige Septa. der tåge deres Udspring 

 ved Randen af Fodskiven og danne ved deres Udspring et 

 virkeligt Par. idet de beståa af 2 Blade, men synes hen- 

 gere op paa Kroppen at sundte sammen til et Septum, der 

 strækker sig et Stykke ind i Gastralhulheden uden at naa 

 Svælgrøret. Ogsaa disse Septa. synes at bære Generations- 

 organer. 



Med Besteinthed kan dette ikke angives; thi Under- 

 sogelserne have været yderst vanskelige, da der kun havdes 

 1 Exemplar, som ikke maatte synderlig sønderlemmes. 



Tver- og Længdemusklerne paa Septa ere ordnede 

 paa den for Actinierne sædvanlige Maade. Muskellaget er 



thickest and longest. Between them. and a litt K- to the 

 outside of them. nearer to the margin, the second series is 

 placed, and also contains 8 tentacles, but somewhat smal- 

 ler than the preceding ones; and. fmally, the third series 



is placed between the seenlid series and tile upperillost 



margin of the body; it contains 16 tentacles of much 

 smaller size than the others. The tentacles have. upou 

 their entire exterior wall, compactly placed. extremely 

 minute, whitish papillæ, which can. however, be observed 

 with the naked eve. and resemble those spoken of above 

 in connectiou with the body and the disc (Pl. VII. fig. 12). 

 The external wall of the body is clad with an epi- 

 thelium consisting of long cylinder-cells furnished with 

 ciliæ (Pl. VII. fig. 10 a); also a great multitude of nemato- 

 cvsts. which are situated in groups and form the previously 

 described small white papillæ (Pl. VII, fig. 10 &). The 

 nematocysts appear to consist of only one lund, viz. ellip- 

 tical, pellucid capsules that enclose a strong, spirally 

 coiled filament. Between the epithelial cells, unicellular, 

 bottle-shaped mucous-glands are observed. but these do 

 not appear to be present in anv great abundance. Inside 

 of the ectoderm, there is a broad hyaline conhective-tissue 

 laver, in whose middle circular muscles are found distri- 

 buted. These, in transverse sections, or more correctly in 

 diagonal sections, form stellate figures that represent the indi- 

 vidual fibrils. and which. easilv enough, niight be mistaken 

 for connective-tissue corpuscles rich in prolongations, but 

 from which thev mav be distinguished both by the colour- 

 ing and by their tibrillar nature (Pl. VII, fig. 10 c), which 

 last, however, is most distinctly seen in longitudinal sec- 

 tions. Towards the endotlielial covering there is a hyaline 

 belt in which no muscle-fibres are found. but where fusi- 

 form connective-tissue cells with prolongations are heie 

 and there seen (Pl. VII. fig. 10 d). The inner mural 

 surface is lined with an endothelium that consists of very 

 long cylinder-cells. furnished with an oblong nucleus and 

 a long riagellum (Pl. VII. fig. 10 e). 



There are lb pairs of perfect septa, which are 

 extremely thin and in manv places perforated. Thev all 

 proceed from the pedal disc and wall of the body. and 

 attach themselves to the oral disc and the æsophagus. 

 These septa carry niesenterial filaments. and on a few of 

 them reproductive organs are visible, placed far down near 

 the bottom of the gastric cavity. Between every twp pairs 

 of the perfect. primary septa. two pairs of secondary. im- 

 perfect septa are observed. having their origin in the 

 margin of the pedal disc, but which form at their origin 

 a real pair. as thev are composed of 2 kminæ. but appear 

 farther up the body to merge into one septum that 

 extends itself a little way into the gastric cavity. without 

 however reaching to the <esophagus. 



These septa also appear to carry reproductive organs. 

 That can. however. not be said with certainty, as the inves- 

 tigations have been exceedingly difficult. there having only 

 been a single specimen. which I dared not much dismember. 

 The transversal and longitudinal muscles on the septa, 

 are arranged in the manner common to the Actiniæ. The 



