54 



fra 3—6 Polyper, af hvilke dels 2, dels 3 ere sammenvoxede 

 ved Grunden. Stammerne og Grenene med deres Forgre- 

 ninger ere uden Kalk, kun Basaldelen bar Spikier, hvoraf 

 Dobbeltstjernen er den almindeligste Form. Polyperne ere 

 temmelig korte, forsynede med Spikelrækker, som paa Ryg- 

 siden indtage Kroppens hele Længde, men paa Bugsiden 

 kim den øverste Halvdel. Spiklerne have væsentligt Form 

 af takkede Spindler, Køller, Tvillinger og Firlinger. Farven : 

 Stammen og Grenene violerte, spillende lidt i det Gule; 

 Polyperne intens violerte. 



Duva flava, n. sp. 



Tab. V. Fig. 1—33. 



Zoanthodemet er indtil 35""" høit. Stammen rund, 

 furet paalangs, temmelig blød og 20 — 25""" i Omfang ved 

 Grunden. Basaldelen tynd, fast, membranagtigt udvidet. 

 Stammen, der aftager lidt i Tykkelse opad, er lige fra 

 Grunden og til Toppen tæt besat med korte, forholdsvis 

 tykke Grene, hvoraf enkelte et Par Millimeter fra deres 

 Ud spring dele sig i to mindre Grene, som atter dele sig i 

 flere Smaagrene, der hver bære flere Polyper, imedens de 

 fleste Grene lidt længere fra Stammen dele sig i 3 — 4 

 mindre, som dele sig i ligesaa mange Smaagrene, der hver 

 bærer 6 — 7 Polyper, Fig. 1. 2. Grenene, der ere temme- 

 lig bløde med udprægede Længdekanaler, ere ligesom Smaa- 

 grenene ■ og den øverste Del af Stammen uden Kalk. 

 Polyperne ere lidt langstrakte, kolbeformige, 4 mm lange med 

 en omtrent lige lang For- som Bagkrop. Polypkroppen, 

 der er 2,5""" lang, er rigt forsynet med Spilder, som paa 

 Forkroppen ordne sig i regehnæssige Eækker, der ophøre 

 ved Tentaklernes Grund, Fig. 3. Paa Bagkroppen ligge 

 de mere uregelmæssigt ; og dennes Bugflade er enten uden 

 Spikier, eller de ere her meget sparsomme. Tentaklerne 

 ere omtrent halvt saa lange som Kroppen, og saavel de 

 som Pinnulerne ere uden Spilder. I Polypernes Mave- 

 hulhed samt tildels i dennes Forlængelse i Smaagrenene 

 sees fuldt udviklede Mg. 



Basaldelen er ikke særdeles rig paa Spikier; de ligge 

 ei i flere Lag, men støde dog tæt til hverandre og paa 

 enkelte Steder endog ligge paa hverandre. De hyppigste 

 Former, hvorunder de optræde, ere sammensatte Stjerner 

 og Spindler. De første ere tildels saa komplicerede, at 

 man kun ved Hjælp af lidt Fantasi kan faa Stjerneformen 

 frem; men brydes de i flere Stykker, lykkes det stundom 



come several times ramified; the outermost branchlets 

 carry 3 — 6 polyps on their extremities; of these, sometimes 

 2. and sometimes 3, are concreted together at the base. 

 The stems, and the branches with their ramificalions, are 

 non-calcareous; only the basal part posesses spicules, of 

 which, the bistellate is the most frequent form. The polyps 

 are rather short, and are furnished with spicular series 

 which, on the dorsal side, occupy the entire length of the 

 body, but on the ventral side, occupy only the uppermost 

 half part of it. The spicules have, principally, the form of 

 spicate fusees, subclavates, twins, and quadruplets. Colour, 

 the stem and the branches violet, shading a little towards 

 yellow. The polyps, intense violet. 



Duva flava, n. sp. 



PI. V. Figs. 1—33. 



The Zoanthodem measures up to 35""" in height. The 

 stem is cylindrical, longitudinally grooved, pretty soft, and 

 it measures 20—25"™ in circumference at the base. The 

 basal part is thin, firm, and membranaeeously dilated. The 

 stem diminishes a litlte in thickness upwards, and, right 

 from the base to the summit, is closely beset with short, 

 relatively thick, branches, of which, a few, a couple of 

 millimetres beyond their root, ramify into two smaller 

 branches, which, again, ramify into several branchlets, each 

 carrying several polyps; but most of the branches ramify, 

 a little further from their root, into 3 — 4 smaller ones, 

 which, again, ramify into as many branchlets, each carry- 

 ing 6 — 7 polyps (figs 1. 2). The branches are rather soft, 

 and have promiment longitudinal ducts; they are, like the 

 branchlets and the uppermost part of the stem, non-cal- 

 careous. The polyps are slightly elongate, and claviform; 

 they measure 4'"™ in length; the anterior and posterior body 

 are about uniform in length. The body of the polyp mea- 

 sures 2,5""" in length, and is richly furnished with spicules, 

 which, upon the anterior body, arrange themselves in regu- 

 lar series; these cease, however, at the root of the tentacles 

 (fig. 3). On the posterior body they are placed more irre- 

 gularly, and its ventral surface is, either, devoid of spicules, 

 or they are, here, very _ sparingly seen. The tentacles are 

 about half the length of the body, and both, they as well 

 as the pinnules, are devoid of spicules. In the ventral cavity 

 of the polyps, and also, partly, in its prolongation into the 

 branchlets, fully developed ova are visible. 



The basal part is not particularly rich in spicules; 

 they are not placed in numerous layers, but still abut 

 close upon each other, and, in a few places are even placed 

 upon each other. The most frequent forms in which they 

 appear, are complex stellates and fusees. The first men- 

 tioned are, partly, so complicated, that, only by a stretch of 

 fancy can we succeed in making out the stellate form; 



