28 



Mundskiven, der er noget hvælvet henimod Munden, 

 er lidt videre end Kolumnen og forsynet med Folder, som 

 straale ud fra den aflange Mund. Dennes Læber ere 

 tykke, foldede og gaa til hver Side over i en temmelig 

 smal Gonidiefure. Stundom skydes Munden op, saa den 

 danner en Konus, og da sees de foldede Læber mere 

 fremspringende. 



Tentaklerne ere retraktile, temmelig lange og sidde 

 i 4 Rækker. I den Iste, inderste, Række, er der 12. som 

 baade ere de længste og tykkeste; i den 2den Række ei- 

 der ligeledes 12, som afvexle med de i den Iste Række; 

 den 3'lje Række har 24, der ere mindre og betydelig tyn- 

 dere end de 2 foregaaende Rækkers og sidde saaledes, at 

 to tåge Plads imellem to af 2den Række; den 4de Række 

 sidder lige i Randen og har ogsaa 24. der ere af samme 

 Størrelse som de i 3die Række. 



Farven: Fodskiven er hvid, dens Underflade er svag 

 gulhvid. Kolumnen melkehvid. skinnende yderst svagt i det 

 Violette, og Sugevorteme ere bleg violette. Mundskiven 

 er næsten chamoisfarvet med lidt lysere Straaler. Tentak- 

 lerne lidt mørkere end Mundskiven. især red deres Grund. 



Dyret synes ikke at fæste sju-, som Actinierne i 

 Almindelighed, til noget andet Legeme, men spadserer 

 paa sin Fod med megen Lethed omkring. Saaledes val- 

 det yderst vanskeligt at holde det paa Bunden af Obser- 

 vationskarret. da det stadig gik op over Væggene og det 

 endog temmelig hurtigt. Naar Dyret trækker sj^ sammen, 

 skjules Mundskiven og Tentaklerne ganske. 



Ectodermet er temmelig tyndt og dannet af de hos 

 Actinierne sædvanlige lange, cilierende Cylinderceller. imellem 

 hvilke tindes i stor Mængde encellede, kolbeformede Slim- 

 kjertler og Nematocyster, Tab. X. Fig. 2. 3 a. Indenfor 

 Ectodermet er et bredt, fibrillært Bindevævslag, i hvis 

 Midte sees et bredt Belte af cirkulære Muskelfibre, der 

 ligge dels i tynde Bundter, dels enkeltvis, Tab. X. Fig. 2. 

 3 6; til hver Side af dette Muskelhelte er et bredt, fibril- 

 lært Bindevævslag, hvori sees Bindevævslegemer og fine 

 Ernæringskanaler, Tab. X, 2, 3 c. 



Der er 6 Par principale, fuldstændige Septa (Iste 

 Orden), der ere golde, og som dele Oastralhulheden i 6 

 Hovedkamre. I ethvert af disse er der 4 Par Septa af 

 2den Orden, som naa hen til Øsophagus uden at fæste sig 

 paa samme; og som bære foruden Mesenterialfilamenter 

 tildels Kjønsorganer. Baade Septa af Iste og 2den On len 

 strække sig hen til Fodskivens Oentrum. Af Septa. til- 

 hørende 3die Orden, er der 24 Par. som baade ere kortere 

 og tyndere og kun halvt saalange som de af 2den Orden, 

 samt naa omtrent halvt ind paa Fodskiven; de bære alle 

 Kjønsorganer og Acontier. Septa af 4de Orden ere meget 

 korte, men temmelig tykke og bære ligeledes Kjønsorganer. 



The oral disc. which is somewhat arcuate towards 

 the mouth, is a little wider than the column, and is fur- 

 nished with folds which radiate outwards from the oblong 

 mouth. The oral labiæ are thick, folded, and on each 

 side pass over into a rather narrow gonidial groove. Some- 

 times the mouth is projeeted upwards, so as to form a 

 cone, in which case the folded labiæ are seen more pro- 

 minently. 



The tentacles are retractile, rather long, and are 

 seated in 4 series. In the innermost, Ist series, there are 

 12 tentacles, which are both the longest and the thickest; 

 in the second series there are also 12 tentacles. which 

 alternate wich those of the Ist series ; the 3rd series has 

 24 tentacles. which are sinaller and much thinner than 

 those of the 2 preceding series, and they are placed in 

 such manner that 2 of them are seated between 2 of the 

 2nd series; the 4th series of tentacles is seated (piite in 

 the mai-gin, and also contains 24. which are of the same 

 size as those in the 3rd series. 



The colon r: the pedal disc is white: its under-sur- 

 face is faint yellowish-white. The column is milky-white, 

 with an extremely faint violet-tinge, and the snckers are 

 pale violet. The oral disc is alniost light buff colour. 

 with slightly lighter-coloured rays. The tentacles are a 

 little darker than the oral disc. especially at their base. 



The animal dues not appear to attach itself — as is 

 usual with the Actinaria — to any other object, hut per- 

 ambulates irpon its base with much ease. It was con- 

 sequently extremely difticult to retain it at tlie bottom of 

 the glass vessel. as it eonstantlv passed up the sides, 

 even with considerable speed. When the animal contracts 

 itself, the oral disc and the tentacles are completely con- 

 cealed. 



The ectoderm is rather thin, and is formed of the 

 long eiliating cylinder-cells usual in the Actinaria. between 

 which a great multitude of unicellular claviform mucous 

 glands and nematocysts are observed (Pl. X. tigs. 2. 3 a). 

 Inside of the ectoderm there is a broad fibrillar layer of 

 connective-tissue. in whose niiddle a broad belt of cir- 

 cular muscle-fibres is seen, which are situated, partly 

 in thin fasciculi. partly simglv (Pl. X, figs. 2, 3 //): upon 

 each side of this muscle-belt there is a broad fibrillar 

 layer of connective-tissue. in which connective-tissue cor- 

 puscles and slender nutritorv ducts are observed (Pl. X. 

 figs. 2. å ei. 



There are 6 pairs of principal. perfect septa (Ist 

 order) which are sterile, and divide the gastral eavity 

 into principal chambers. In each of these chambers 

 there are 4 pairs of septa of the 2nd order, which extend 

 to tin- æsophagus without, however, attaching themselves 

 to it. and that partly carry, besides mesenterial filaments, 

 also reproductive organs. Both the septa of Ist and 2nd 

 order extend to the centre of the pedal disc. There are 

 24 pairs of septa pertaining to the ord order, which are 

 both shorter and thinner and only half the length of those 

 of the 2nd order, and they also extend, only half way on to the 

 pedal disc; they all carry reproductive organs and acontia. 



