51 



Farven. 



Farven er bleg gulrød. Polypkroppen næsten vand- 

 klar med et svagt rødligt Skjær af det gjennemskinnende 

 Svælg. Tentaklerne lidt mørkere. 



Findested. 

 Station 370. Et større og et mindre Exemplar. 



At' den her givne Beskrivelse vil det erfares, at Duva 

 spitsbergensis har saameget tilfælles med Duva arborescens, 



at det er næsten umuligt makroskopisk at skille dem fra 

 liinanden. Benyttes derimot! en stærk Loupe. vil det strax 

 vise sig, at imedens Duva arborescens Lar Kalkspikler over- 

 alt i Zoantliodemet. mangler Duva spitsbergensis saadanne 

 de fleste Steder, hvorved den nærmer sit»' mere Duva 



paa eie 



rosea. milii.. men 



seender. 



hvorfra den dog adskiller si<>- i flere Hen- 



Artskarakter. 



Zoantliodemet indtil 110""" lioit. Stammens Omfang 

 ved Grunden 45""", furet paalangs, rundt omgiven af Grene 

 fra Basaldelen til Toppen. Basaldelen glat. Grenene nøgne, 

 sta-rkt forgrenede; de yderste Smaagrene bære 3 — 6 Polyper. 

 1 Stammens Basaldel smau, spredte Spikler som takkede 

 Spindler med vingeformede Udvidninger og korsformede 

 Firlinger. Hele den øvrige Del af Stammen med dens 

 Grene og Smaagrene uden Spikler Polyperne cylindriske 

 meil en lanu; Bagkrop Polypkroppen forsynet med 8 Dobbelt- 

 rækker Spikler, hvoraf de 2 paa Bugsiden ere meget korte, 

 imedens de 2 paa Rygsiden indtage næsten hele Polypens 

 Længde. Spiklerne paa Kroppen optræde som takkede 

 Spindler, tornede Koller og korsformede Firlinger. Ten- 

 taklerne have paa deres aborale Flades Grund Spikler, der 

 ere Fortsættelser af Kropsspiklerne. Farven bleg gulrød. 

 Polyperne næsten vandklare med et svagt rødligt Skjær af 

 Svælget. Tentaklerne mørkere. 



Colour. 



The colour is pale yellowish red. The body of the 

 polyp is almost pellucid, with a faint reddish tinge imparted 

 by the translueent gullet. The tentacles are a little dalker 

 in colour. 



Habitat. 

 Station No. 370. One largish. and one smaller spec- 



inien. 



From the description given, hero, it will be gathered. 

 that as Duva spitsbergensis has so much in commom with 

 Duva arborescens, it is almost impossible to distinguisb 

 them from each other macroscopically. If. on the other 

 hand. a powerful magnifier is used, it will, inmiediatelv, 

 become apparent, that whilst Duva arborescens has, every- 

 where. calcareous spicules on the Zoanthodem, Duva spits- 

 bergensis is devoid of these on most parts of it, and it, 

 thus. approaches more to Dura rosea, ru/lu, hut from which 

 it is distinguished. however, in several respects. 



Specific characteristics. 



The Zoanthodem measures up to 1 1 1 )""" in height. The 

 circumference of the stem is, at the base, 45"""; it is longi- 

 tudinally grooved, cylindrical, and. from the basal part to 

 the summit. is encompassed by branehes: the basal part 

 smooth; the branehes bare. and strongly ramitied; the 

 outermost branchlets carry 3 — 6 polyps. ln the basal part 

 of the stem, minute, dispersed, spicules. appearing as spicate 

 fusees with pennate dilations, and as cruciform quadruplets. 

 The entire remainder of the stem, with its branehes and 

 branchlets, devoid of spicules. The polyps cylindrical, 

 with a long posterior body; the body of the polyp fur- 

 nished with 8 double-series of spicules, of which, the 2 

 series on the ventral side are very short, whilst the 2 

 series on the dorsal side occupy almost the entire length 

 of the polyp. The spicules on the body appear as spicate 

 fusees. aculeated subclavates, and cruciform quadruplets. The 

 tentacles have, at the base of their aboral surface, spicules 

 which are a continuation of the spicules of the body. The 

 colour is pale yellowish red. The polyps almost pellucid, 

 with a faint reddish tinge imparted from the gullet. The 

 tentacles darker in colour. 



