47 



Grene, der meget snart forgrene sig i 3 — i Smaagrene, 

 som hver bærer 4—6 Polyper. Saavel Stammen som Gre- 

 nene og Smaagrenene ere faste, stive og forsynede med 

 Spikier, der kun kan iagttages ved stærk Loupe, Fig. 

 34. 35. 



Polyperne ere cylindriske, langstrakte, 5""" lange, med 

 en kort, noget udvidet Forkrop og en smal, noget længere 

 Bagkrop, Fig. 36; de ere rigt forsynede med Spikier, som 

 ere ordnede i Eækker overalt paa Ryggen og Siderne, 

 Fig. 36, imedens den nederste Del af Bugen er saagodt- 

 som spikelfri. Fig. 37, hvorfor de i Spiritus opbevarede 

 Polyper altid ere stærkt bøiede mod Bngsiden. Tentak- 

 lerne ere 2,5™'" lange, omtrent halvt saa lange som Poly- 

 pens hele Længde, temmelig tykke, og cle 4 Rygtentakler 

 have paa deres aborale Side en Bække Spikier, Fortsættelse 

 af Byggens, eler strækker sig et Stykke ovenfor Tentakelens 

 Midte, Fig. 36; Pinnulerne ere uden Kalk. I Polypernes 

 Mavehulhed sees Æg. 



I Basaldelen ligge Spiklerne kompakt paa hverandre 

 i flere Lag, hvilket giver denne Del af Zoantbodemet sin 

 betydelige Haardhed. Hovedmassen af Spiklerne optræder 

 her under ganske særegne Former, for- største Delen for- 

 skjellige fra dem, vi tidligere have fundet bos Alcyoniderne. 

 Kun hos Duva aurantiaca fandtes enkeltvis nogle Spikier 

 i Basaldelen, der havde nogen Lighed med dem. De kunne 

 sammenlignes med Søiler, som have en bred, lidt knudet 

 Basal, et temmelig langt, næsten glat, rundt Skaft, og et 

 Kapitel, der er bredt som Basalen og besat med Blade ; 

 de ere 0.180""» lange; Basalen og Kapitelet er 0.080 mm 

 bredt, Skaftet 0.026""" bredt, Fig. 38. Søilespiklerne op- 

 træde hist og her imellem de Spikier, der udgjør Hoved- 

 massen og hvoraf enkelte have Kølleformen, men Største- 

 parten danner korte, lidt knudrede, dels lige, dels krumme 

 Bjelker, der ere 0.140'»'» lange 0.032"™ brede, Fig. 39—44. 

 Temmelig ofte sees ogsaa imellem de nævnte Bjelker kors- 

 formede Firlinger, hvis Arme ere omtrent lige lange, 

 0.090""" i Gjennemsnit, og so in have paa deres Ender 

 enkelte smaa Papiller, Fig. 45 ; men meget sjeldnere sees 

 Firlinger af Timeglasform, som ere 0.100""" lange, 0.080»"» 

 brede i Enderne og 0.040""" brede paa Midten, Fig. 46. 

 Overorden thg sjeldent træffes en meget sammensat, tornet 

 eller bladet Spindel, der er 0.100""" lang, 0.080" m paa 

 Midten, Fig 47. 48, samt korte Klubber, 0.080""» lange, 

 med 0.052""» bredt Hoved og 0.024'""' bredt Skaft, Fig. 49. 



Stammen er ligeledes meget rig paa Spikier, der paa 

 den nederste Halvdel ligge tæt til hverandre, men spredes 

 mere, jo længere man kommer oj) imod Toppen. Paa 



from each other, and are cylindrical, grooved, and, as a 

 rule, ramify, a few millimetres from the stem, into two 

 smaller branches which very speedily again ramify into 

 3 — 4 bran chiefs, each of which carries 4 — 6 polyps. Botb, 

 the stem, as well as the branches and the branchlets, are 

 firm, stiff, and supplied with spicules which are only obser- 

 vable, however, through a powerful magnifier (figs. 34. 35). 

 The polyps are cylindrical, elongate, and measure 

 5""" in length, and they have a short, somewhat dilated 

 anterior body, and a narrow, somewhat longer posterior 

 body (fig. 36); they are richly furnished with spicules, 

 which are, everywhere, arranged in series on the dorsum 

 and the sides (fig. 36), whilst, the lowest part of the ven- 

 trum is almost devoid of spicules (fig. 37) ; for this reason 

 the polyps preserved in alcohol are always strongly curved 

 towards the ventral side. The tentacles are 2,5""" in length, 

 or about half of the entire length of the polyp ; they 

 , are tolerably thick, and the 4 dorsal tentacles have, on 

 their aboral side, a series of spicules which is a continuation 

 of the dorsal one, and extends itself a little way above the 

 middle of the tentacle (fig. 36). The pinnules are non- 

 calcareous. In the ventral cavity of the polyps, ova are 

 observed. 



In the basal part, the spicules are placed compactly 

 upon each other in several layers, and this imparts, to 

 that part of the Zoanthodem, its firmness. The main 

 body of the spicules appear, here, in quite peculiar forms, 

 different, for the greater part, from those which we have 

 previously found in the Alcyonoids. In Duva aurantiaca 

 alone, did we find, occasionally, a few spicules in the basal 

 part, having some resemblance to them. They may be said 

 to resemble columns with a broad somewhat protuberant 

 base, a rather long, almost cylindrical shaft, and a capital, 

 as broad as the base, beset with foliage ; they measure 0.180""" 

 in length, and the base and capital measure 0.080""" in 

 breadth; the shaft measures 0.026 mm in breadth (fig. 38). 

 The columnar spicules appear, here and there, between 

 the spicules which compose the main body and of which 

 a few have the subclaviform, but the greater number of them 

 form short, slightly rugged, partly straight, partly bent, beams, 

 measuring 0.140"'"' in length, and 0.032 7 "'" in breadth (figs. 

 39 — 44). Pretty frequently, there are, also, seen between 

 the beams mentioned, cruciform quadruplets, whose arms 

 are about uniform in length, and measure 0.090""" in 

 diameter, and which, on their extremities, have a few small 

 papillæ (fig. 45), but, much less frequently, quadruplets of 

 the hour-glass form are seen, which measure 0.100'"'" in 

 length, and O.080""" in breadth at the extremities, and 

 0.040""" at the middle (fig. 46). Extremely rarely, a very 

 complex, aculeated, or foliaceous fusee is met with, which 

 measures 0.100""" in length, and 0.040'""' in breadth at 

 the middle (figs. 47. 48), also, short clavates, measuring 0.080""" 

 in length, and having a 0.052""" broad head, and a 0.024""" 

 broad shaft (Fig. 49). 



The stem is, likewise, very rich in spicules which, in 

 the lowest half portion, are placed close to each other, but 

 become more dispersed the further up they proceed towards 



