143 



Cerianthus abyssorum. u. sp. 

 Tab. V. Fig. 7. 



Kroppen, som er cylindrisk men udvider sig stærkt 

 traktformigt fororen, er 65""" lang. 25""" bred i den øverste 

 Ende og 8""" bred i den nederste, noget tilspidsede Ende 

 der er forsynet med en stor. rund Aabning, som udvider 

 og sainmentrækker sig. Huden er glat, men har paa den 

 øverste Fjerdedel stærkt udprægede Længdefolder, der synes 

 :it svare til Tentakelantallet. Kroppens overste Rand bærer 

 en Række af 40 Tentakler, som ikke ere retraktile, tem- 

 melig tynde og omtrent saa lange som Mundskivens Bredde, 

 Tab. V, Fig. 7. Denne sænker sig traktformig ned mod 

 den aflange Mund, som er omgiven af 40 Tentakler, der 

 kanske ere lidt tyndere end Randtentaklerne, men at' omtrent 

 samme Længde som disse. Perisomet er forsynet med 

 tine Folder, der lober vittetormigt ud fra den indre Tentakel- 

 række mod Randtentaklerne. Farven: Kroppen er bleg 

 brunlig, men dens overste Rand er i nogle Millimeters 

 Bredde hvid. Mundskiven mørkebrun: omkring Munden 

 en lysere Ring. Tentaklerne mork rødbrune. Roret, som 

 Dyret bebor, er henved en Fod langt og er sammensat af 

 brungult Ler, temmelig ujævnt, ligesom filtret paa dets 

 udvendige Side. imedens det er glat, glinsende og niem- 

 branøst paa dets indre Væg. 



Findested. 



Station 251. Kun et Exemplar, og det var saavidt 

 ilive ved dets Udtagelse af Skraben, at det kunde tegnes 

 og for en Del observeres ; mange af Randtentaklerne vare 

 a trevne. Af tomme Ror fandtes flere. 



Da jeg ikke har villet odelægge det eneste Exemplar, 

 som haves, og da jeg antager, at Dyret i anatomisk-histo- 

 logisk Henseende ikke adskiller sig væsentlig fra Cerianthus 

 Vogti, har jeg ingen intimere Undersøgelse foretaget. At 

 Arten er forskjellig fra Cerianthus Vogti fremgaar for- 

 mentlig af Tentaklernes Antal og Beskaffenhed. af Farven, 

 af det lange Ror, den bebor og endelig af den yderst for- 

 skjellige Lokalitet, paa hvilken den fandtes. 



Æffireæ 1 , Danielssen. 



Cerianthus abyssorum. n. sp. 



Pl. V. fig. 7. 



The body is cylindrical, but dilates itself stronglv al 

 the top in infundibuliform ; it measures 65""" in length, 



25 in breadth at the uppermost and 8'""' in breadth 



at the lowest, acuminated extremity , which latter is 

 furnished with a large round aperture that dilates and 

 contracts itself. The integument is smooth, but upon its 

 uppermost fourth-part has strongly distinguished longitud- 

 inal folds that appear to correspond in number to that of 

 the tentacles. The uppermost margin of the body carries 

 a series of 40 tentacles, which are non-retractile. råtner 

 thin, and about as long as the breadth of the oral disc 

 (Pl. V, rig. 7). This sinks in infundibuliform towards 

 the oblong oral aperture. which is surrounded by 40 ten- 

 taetes that are. perhaps, a Little thinner than the marginal 

 tentacles, but of about the same length as these. The 

 peristome is furnished with fine folds that issne, fan like. 

 from the inner tentacular series towards the marginal ten- 

 tacles. The colour. The body is pale brownish, but its 

 uppermost margin is, for a few millimetres of its breadth, 

 white. The oral disc is dark-brown. with a lighter coloured 

 annulus round the oral aperture. The tentacles dark red- 

 dish-brown. The tube that the animal dwells in is about 

 a foot long. and is constructed of brownish-yellow clay, 

 pretty rough, appearing porous on its external side, whilst 

 upon its inner wall it is smooth, shining and membranous. 



Habitat. 



Station No. 251. Only one specimen. and it was so 

 far animate when removed from the dredge. that it could 

 be drawn and to some extent observed. Many of the 

 marginal tentacles were torn away. Several empty tubes 

 were found. 



As I have been unwilling to destroy the solitary 

 specimen we have, and as I imagine that the animal does 

 not, in anatomo-histological respects, materially distinguish 

 itself from Cerianthus Vogti, I have not made any par- 

 ticularly elose investigation of it. That the species differs 

 from Cerianthus Vogti is probable from the number and 

 nature of the tentacles, trom the colour of the long tube 

 in which the animal dwells and. finally, from the extremely 

 different locality in which it was found. 



Ægireæ 1 , Danielssen. 



Actinida med fuldstændig Kropshulhed (Coelom) og Actinida with a perfect body-cavity (Coelom) and 



et udviklet l)igestionsapparat. bestaaende af Svælgrør, Tarm a developed digestive apparatus, consisting of æsophagus, 



og Anus. 



1 Ægir = Havets Gud. 



intestine and anus. 



Ægir = The god of the sea in Scandinavian mythology. 



