142 



Mesenterialfilainenter, men et saadant Forhold finder ingen- 

 lunde Sted hos Cerianthus Vogti, hvilket jeg ovenfor har 

 paavist. Saavel Mesenterialfilamenterne som Æggestokkene 

 ere beklædte med et Epithel, bestaaende af cilierende 

 Cylinderceller , imellem hvilke sees dels spredte, dels i 

 Grupper staaende Nematocyster. 



Af den ovenfor givne Beskrivelse fremgaar det for- 

 mentlig, at den bilaterale Symetri. som Yogt har gjort 

 gjældende for Cerianthus membranaceus. ogsaa er gjennem- 

 gaaende hos Cerianthus Vogti. 



Findested. 



Station 87. Xogle Exemplarer. hvoraf 1, nemlig det 

 som blev tegnet, var aldeles ubeskadiget og levede nogle 

 Dage i Observation skarret; de øvrige vare mere eller 

 mindre molesterede. 



C. Yogt karakteriserer Familien Cerianthidæ paa 

 følgende Maade: Actiniens libres a symétrie bilaterale 

 persistante. a pm-e terminal donnant accés dans la cavité 

 générale. ayant mi disque buccal ample. concave, éntouré 

 de deux couronnes de tentacules, marginaux et buccaux, 

 séparés par mi large péristome lisse. Les tentacules smit 

 appareillés deux a deux de maniére que dans chaque loge 

 laterale débouche un tentacule de chaque surte. Les 

 clpisons n'atteignent pas le fond de la cavité générale, 

 sauf deux continues correspondant au tentacule impair, les- 

 quelles constituent une rigole interne conduisant au pore. 



Cerianthus Vogti. 



Artskarakter. 



Legemet cylindrisk, udvider sig traktformigt foroven, 

 80""" langt. 20""" bredt i øverste og (i""" i nederste Ende. 

 Kroppen udvendig glat til opimod 10""" fra Mundskiven, 

 hvor den bliver foldet paalangs. Folderne lige lange og 

 lige brede, naar undtages en. der er bredere og strækker 

 sig længere ned paa Kroppens Rygside. Modsat denne 

 Fi ild er paa Bugsiden en tin Fure. Den aborale Ende 

 forsynet med en stor. rund Aabning. Kroppens øverste 

 Rand bærer en Række lange, ikke retraktile Tentakler i 

 et Antal af 36. Mundskiven noget fordybet. Munden 

 atlang. omgivet af 36 mindre og tyndere Tentakler. Farven: 

 Kroppen er bleg gul. spillende lidt i det bleg-rosenrøde. 

 Ramltentaklerne paa deres aborale Side smukt rosenrøde; 

 paa den adorale Sule lysbrune. Mundtentaklerne ere smukt 

 kastaniebrune, ligesaa Mundskiven med lysere Straaler. 

 Roret, hvori Dyret opholder sig. er ikke længere end 

 Kroppen, dannet af Slim. Ler. Sand og andre fremmede 

 Lesemer. 



organs, and every other intermediate oné mesenteria] fila- 

 ments, but such a relation does not at all occur in Cerianthus 

 Vogti. as I have shown above. The mesenterial filaments 

 as well as the ovaries are clad with an epithelium con- 

 sisting of eiliating cylinder-cells, between which nemato- 

 cysts an- observed. placed, partlv scattered about partly 

 in groups. 



From the description given above it proceeds, pre- 

 sumably, that the bilateral symmetry, which Yogt has 

 established for Cerianthus membranaceous, is also generally 

 present in Cerianthus Vogti. 



Habitat. 



Station No. 87. A fe w specimens of which 1. the 

 one that has been illustrated. was perfectly uninjured and 

 lived for several days in the glass vessel; the utbers were 

 more ur less injured. 



C. Yogt eharacteii/es the taniilv Cerianthidæ in the 

 following manner: Actiniens libres .i symétrie bilaterale 

 persistante, å pore terminal donnant accés dans hi cavité 

 générale, ayant un disque buccal ample. concave, entouré 

 de deux couronnes de tentacules. marginaux et bucceaux, 

 séparés par un large péristome lisse. Les tentacules sont 

 appareillés deux a deux de maniére que dans chaque loge 

 laterale débouche un tentacule de chaque sorte. Les 

 cloisons a'atteignent pas le fond de la cavité générale 

 sauf deux continues correspondant au tentacule impair. 

 lesquelles constituent une rigole interne conduisant au pure. 



Cerianthus Vogti. 



Specific characteristics. 



The body cylindrical, dilates itself in infundibuliform 



at the top, measures 80""" in length, 20 ' in breadth at 



the uppermust and 6 "' in breadth at the lowesl extremity. 



Externally the body is smooth until within about 10" jf 



the oral disc, where it becomes longitudinallv folded. The 

 folds uniform in length as well as in breadth, with excep- 

 tiou of a single one. which is broader and extends itself 

 farther Anwn the dorsal side of the body. Opposite this 

 fold there is a fine furrow on the ventral side. The 

 aboral extremity is furnished with a large round aperture. 

 The uppermost margin of the body carries a series of 

 long non-retractile tentacles, to the number of 36. The 

 oral disc somewhat depressed. The oral aperture oblong, 

 surrounded by 36 smaller and thinner tentacles. The 

 colour. The body is pale yellow with a pale rose-red 

 |ila\ of colour. The marginal tentacles are, upon their 

 aboral side. a beautiful rose-red. and on the adoral side 

 light-brown. The oral tentacles are a beautiful chestnut- 

 brown colour; also the oral disc, but with lighter- 

 coloured radii. The tube in which the animal dwells is 

 not longer than the body. ' and is formed of slime, clav, 

 sand and other foreign substances. 



