105 



paa den forreste Flade af det overliggende Zooeeium 

 (Tab. 12, Fig. 6, 8, b, b). Det er Muskelens Tendo, som 

 er rundagtig, der fæster sig paa den øverste, afrundede 

 Del af Apophysen, medens de enkelte Muskelfibre befæ- 

 ste sig paa Zooeciets Forflade op imod dets øverste 

 Rand. Hvor der fra et Zooeeium udgaa tvende Zooecier 

 for at danne en ny Gren, — der er det underliggende 

 Zooeeium forsynet med to saadanne Apopbyser, for at 

 bvert overliggende Zooeeium kan erholde sin særskilte 

 Muskel (Fig. 8 c, c). Aviculariet, der sidder paa den ydre 

 Rand af Zooeciet, noget ovenfor dettes Midte, er meget 

 langstrakt, bar en lav Isse, en temmelig lang Mandibel, 

 der er bøiet mod Spidsen (Fig. 5), og forlænger sig bag- 

 til i en smalere, tilspidset Del, hvorpaa der findes en 

 næsten trekantet Articulationsflacle. Musculaturen er stærk. 

 Retningen af Aviculariet er udenfra indad, nedenfra opad, 

 saa at Næbbet rager et godt Stykke ind paa Sidezooeciet. 



Ooeciet er næsten kuglerundt og fæstet til Zooeciets 

 øverste, ydre Rand, saaledes at dets runde Aabning hvæl- 

 ver sig over Mundaabningen (Fig. 6 c, c). I mange Ooecier 

 saaes fuldt udviklede Æg. 



Rodtraaclen udspringer fra den udvendige Rands ne- 

 derste Del af Zooeciet, er rund og halv gjennemsigtig 

 og gaar ned mod det underliggende Zooeeium, hvor den 

 som oftest danner en blød, conisk Fremstaaenhed, hvis 

 bredere Del ligesom udfylder Rummet mellem begge 

 Zooecierne, medens den smalere Del rager fritud (Fig. 4 b, 

 8 d, d). Hvor denne Fremstaaenhed findes, gaar Rodtraaden 

 mellem to Zooecier og danner en Udbredning i Form af en 

 Skede, som omgiver ikke alene den før beskrevne Apo- 

 physe, men ogsaa Muskelens Tendo, hvorefter den som 

 en fin Membran dækker Zooeciets forreste Flade (Fig. 

 8 e, e). Muskelen ligger følgelig mellem denne Membran 

 og Ectocysten. Rodtraaden gaar nu nedover det under- 

 liggende, ældre Zooeciums Rand, og forener sig med dettes 

 Rodtraad; længere ned paa Grenene blive de saaledes 

 sammensmeltede Rodtraade bredere, og naar de komme 

 ned imod Hovedgrenens Delning, udbrede de sig som en 

 temmelig fast, halv gjennemsigtig Membran, der gaar mod 

 den tilsvarende Sidegren, hvor den smelter sammen med 

 en lignende membranøs Udbredning fra denne, Paa denne 

 Maade holdes saavel Hovedgrenene, som de nederste (in- 

 derste) Dele af Bigrenene sammen (Fig. 6 d). Ved Siden 

 af denne Membrandannelse fortsætte nu Rodtraadene sit 

 Løb ned imod Grenenes nederste Ende, hvor de smelte 

 sammen til en eneste tyk Traad, som her danner den 

 lange Stilk (Tab. 3, Fig. 12). Paa et Exemplar have vi 

 iagttaget, at denne Sammensmelten først dannede to Ho- 

 vedtraade, der omtrent 1 Tomme længere nede forenede 

 sig til en (Stilken). 



Polypiden er temmelig lang, forsynet med 24 lange 

 Tentakler (Tab. 3, Fig. 14). Maven og den korte Tarm 



for a very strong muscle, which extends radially on the 

 anterior surface of the superincumbent zooeeium (Tab. 12, 

 fig. 6, 8, b, b). It is the tendon of the muscle, which is 

 roundish, that attaches itself to the upper rounded part 

 of the apophysis; while the single muscular fibres attach 

 themselves on the anterior surface of the zooeeium and 

 towards its upper margin. Where from one zooeeium 

 there proceed two zooecia to form a new branch, there 

 the subjacent zooeeium has two such apophyses, in order 

 that each superincumbent zooeeium may have its sepa- 

 rate muscle (fig. 8 c, c). The aviculary, which is situated 

 on the exterior margin of the zooeeium, a little above the 

 centre, is very much elongated; it has a low crown and 

 a rather long mandible curved towards the point (üg. 5); 

 it is continued backward in a narrower tapered part, on 

 which there is a nearly triangular articulating surface. 

 The muscular system is strong. The direction of the 

 aviculary is inward from the exterior, and upward from 

 below; so that the beak projects some distance over the 

 side-zooecium. 



The ooecium is nearly globular, and attached to the 

 upper exterior margin of the zooeeium; so that its round 

 opening arches over the oral aperture (fig. 6 c, c). In 

 many ooecia there appeared fully developed ova. 



The rootlet issues from the lower part of the exterior 

 margin of the zooeeium; it is round and semi-transparent, 

 and goes down towards the subjacent zooeeium, where it 

 most frequently forms a soft conical process, the broadest 

 part of which about fills the space between the two zooecia, 

 while the narrower part is free (fig. 4 b, 8 d, d). Where 

 this conical process is found, the rootlet goes between 

 two zooecia and forms an enlargement in the shape of 

 a vagina, surrounding not only the before mentioned 

 apophysis, but also the tendon of the muscle, after which 

 it covers, like a fine membrane, the anterior surface of 

 the zooeeium (üg. 8 e, e). The muscle lies consequently 

 between this membrane and the ectocyst. The rootlet 

 goes now downwards over the margin of the older zooe- 

 eium, and connects itself with the rootlet of the latter; 

 further down on the branches, the rootlets thus com- 

 bined become broader; and when they come down towards 

 the division of the main branch, they extend themselves 

 in the form of a rather solid, semi-transparent membrane, 

 which goes towards the corresponding lateral branch, 

 where it coalesces with a similar membranous enlargement 

 from the latter. In this manner the main branches, as 

 well as the lower (interior) parts of the subsidiary bran- 

 ches, are held together (fig. 6 d). By the side of this 

 membranous formation, the rootlets now continue their 

 course downwards towards the lower extremity of the 

 branch, where they coalesce in one single thick filament, 

 which here forms the long stem (Tab. 3, fig. 12). In one 

 specimen, we have observed that this coalescence first 

 formed two main filaments, which, about one inch lower 

 down, united themselves into one (the stem). 



The polypide is rather long; it has 24 long tentacles 

 (Tab. 3, fig. 14). The stomach and the short intestine 



