136 



Formlen de her beskrevne Zoanthider fandtes paa 

 Station 252 et Exemplar af Epizoanthus (Zoanthus) arc- 

 ticus. M. Sårs, og paa Station 260 nogle Exemplarer af 

 Polythoa arenacea, Delle Ohiaje, (Mamillifera inerustata, 

 Zoanthus incrustatus, Diib. et Kor.). 



Besides the Zoantbidæ described here, there were 

 found, at station 252, a specimen of Epizoanthus (Zoanthus) 

 arcticus M. Sårs; and at station 260 a tW specimens 

 of Polyphoa arenacea, Delle Chiaje (Mamillifera inerustata. 

 Zoanthus incrustatus. Dub. et Kor.). 



Ceriantheæ, Hertwk. 



Familie Cerianthidæ, Hertwig. 

 SliPgt Cerianthus, Delle Chiaje. 



Professor Carl Vogt har i Archives de Biologie 

 leveret en yderst interessant Afhandling over Slægterne 

 Arachnactis og Cerianthus og paavist til Evidents ikke 

 alene en gjennemgaaende bilateral Symetri hos disse Slæg- 

 ter. men at de ogsaa i raorphologisk Henseende staa hin- 

 anden saa nær, at der kunde være nogen Grund til at 

 antage Arachnactis for en svømmende Larve af Cerianthus, 

 dersom ikke de fuldt udvoxne Dyr paa det Bestemteste 

 afvise et saadant Forhold. Naar jeg nedenfor beskriver 

 tu nye Arter at Cerianthus fm ilen muske Nordhavsexpedi- 

 tion, maa jeg henvise til de fortrinlige Arbeider over denne 

 Slægt, sum ere leverede af Jules Haine ', A. von Heider 8 

 og Carl Vogt 8 ; tin det Material, jeg har liavt at raade 

 over. er saa lidet og dertil saa stærkt medtaget af Bund- 

 skraben, der har beskadiget Dyrene, sum sandsynligvis 

 sidde i den lose. dyndede Bnml. at Undersøgelserne ikke 

 kunne viere udtømmende. Begge Arter ere hentede fra 

 den kolde Area i en Dybde fra 480 — 693 Favne med en 

 Temperatur -:- 1.2 C. Naar der undtages 1 Exemplar, 

 der angives af Moseley fra Challengei-Expeditionen, og 

 som forresten er et tvivlsomt Specimen. der tilhører de 

 store Dyb. saa er alle hidtil kjendte Former af Cerianthus 

 fra temmelig ringe Dybder, og forsaavidt kan de to Arter, 

 jeg nu skal beskrive, ogsaa have sin Interesse. 



1 Jules Haine. Memoire sur Ir Cerianthe (Cerianthus mem- 

 branaceus). Annales des Sciences natur, -line serie. 1854. 



- A. von Heider. Cerianthus membranaceus, Haine. Ein 

 Beitrag /ur Anatomie der Actinien. Sitzungsberichte 'ler mathe- 

 matisch-naturwissenchaftlichen Classe der K. K. Akademie der Wis- 

 sensehaften in Wien. Vol. 79, 1te Abtheilung 1879. Pag. 204. 



Carl Vogt, Professeur å Genéve. Des genres Arachnactis 

 el Cerianthus. Archives de Biologie, pub. par Ed. van Beneden et 

 Charles van Bambeke. Tmne VIII. Fascicule 1. Pag. !. Liége 

 is—. 



' Ceriantheæ, Hert^ dg. 



Family Cerianthidæ. Hertwig. 

 Genus Cerianthus, Delle Chiaje. 



Professor Carl Vogt lias. in ..Archives de Biologie", 

 given an extremely interesting Paper on the genera Arach- 

 nactis and Cerianthus, and shown, most conclusively. not 

 only a generally pervading bilateral symmetry in those 

 genera, but also, that they, in naorphological respects, are 

 so closelj related tu each utber, that there iniglit be good 

 reason in take Arachnactis t<> be a swimming larva of Ceri- 

 anthus. it' the full\ developed animal did not. in the most 

 distinct manner, disprove such a relation. While I now 

 describe, in whal follows, tu<> new species of Cerianthus 

 from the Norwegian North-Atlantic Expedition, I would 

 refer the reader tu the admirable works mi the genus 

 that have luen published by Jules Haine '. A. von Heider -' 

 aud Carl Vogl ; . as the material I have had at my 

 disposal is sn small, and is. besides. su much injured by 

 the dredge. which has destroyed the animals that probably 

 have been seated in the loose sliniy bottom, that the in- 

 vestigations have not been exhaustive. Both the species 

 are obtained from the cold area :it a depth of from 

 4*»! 693 fathoms, and a temperature of -f- 1.2 C. When 

 we except a single specimen. nientioiied by Moseley, from 

 the „Challenger" expedition, and which is. besides, a doubt 

 ful one. thaf pertains to the great deep, all the hitherto 

 known forms of Cereauthus have come from pretty shallow 

 waters; the two speeies I purpose now to describe are 

 therefore, so far. of peculiar interest. 



1 Jules Hamn. Memoire sur le Cerianthe (Cerianthus mem- 

 branaceus). Annales des Sciences natur. 4me serie. isr,4. 



A. von Beider, Cerianthus membranaceus, Haine. Ein 

 Beitrag /ur Anatomie der Actinien. Sitzungsberichte der mathe- 

 matisch-naturwissenchaftlichen Classe der K. K. Akademie der Wis- 

 senschatten in Wien. Vol. 79, 1te Abtheilung 1 s.79. Pag. 204. 



Carl Vogt, Professeur ;i Genéve. Des genres Arachnactis 

 et Cerianthus. Archives de Biologie. pub. par Ed. van Beneden et 

 Charles van Bambeke. Teine VIII. Fascicule 1. Pag. 1. Liége 

 1 888. 



