14 



som den Del, hvorfra de udgaa; disse Stoloner ere tynde 

 og fæste sig et Stykke fra Basaldelens Grund, Fig. 1, a. 

 Paa nogle mindre Exemplarer danner Basaldelen kun et 

 enkelt, tykt Rør fyldt med Ler; men fra det udgaa flere 

 mere eller mindre tykke Stoloner 1 . Stammen er rund. 

 riflet paalangs, 35"™ i Omkreds ved Grunden, men aftager 

 noget i Tykkelse opad imod Toppen, hvor den bliver 

 temmelig smal, og hvorfra udgaa 3 tætstaaende, tykke, . 

 korte Grene, Fig. 1. Omtrent 12"™ fra Basaldelen sees 

 dels enkelte Polyper, dels korte, tykke Grene at udspringe 

 rundt om Stammen, og fra nu af tiltage Grenene baade i 

 Mængde og Størrelse, saa at Stammen paa dens øverste 

 Del er godt forsynet dermed. Paa Midten af Stammens 

 grenbærencle Del ere Grenene længst, indtil 20""" lange, 

 og paa dem iagttages flere Smaagrene, Fig. 1. Saavel 

 disse som Grenene ere rigt besatte med Polyper, der staa 

 saa tæt, at cle for en Del skjule Grenene. 



Hvad ovenfor er beskrevet, gjælder nu væsentlig det 

 største Exemplar; paa andre Exemplarer er Stammen 

 forholdsvis tyndere: Grenene udspringe rundt Stammen, 

 have ofte Smaagrene, og ere rigt besatte med Polyper. 

 Paa to Exemplarer er Stammen nøgen i en temmelig lang 

 Strækning, og dens øverste Ende deler sig i 2 — 3 Hoved- 

 grene, som ere meget tykke, forholdsvis korte og forsynede 

 med enkelte Smaagrene, der ligesom Grenene bære en 

 Mængde Polyper. Det er disse to Exemplarer, hvis Basal- 

 del er skiveformigt udvidet, Fig. 1, A. 



Polyperne ere krukkeformede med bred Tentakel- 

 skive og omtrent 8""" lange, Fig. 2. Kroppen er 5'"'" 

 lang, forsynet med 8 Spikelrækker. Tentaklerne tykke ved 

 Grunden, 3""" lange; Pinnulerne temmelig lange, smale, og 

 saavel disse som Tentaklerne ere rige paa Spikier, Fig. 2. 



Hele Zoanthodemet er spikelrigt, Paa Basaldelen 

 med dens Stoloner ligge Spiklerne pakkede paa hverandre 

 og optræde væsentligt under Form af Dobbeltstjerner, 

 hvoraf enkelte nærme sig Dobbeltkuglen med takkede Ender, 

 0.112"™ lange, 0.096""" brede i Enderne og 0.032""" bred 

 paa det glatte Midtparti, Fig, 3. Dobbeltstjernerne have 

 tildels et langt, nøgent Midtparti, Fig. 4 ; men hyppigst er 

 dette kort, imedens der fra begge Ender udgaa Straaler, 



1 Hos Vceringia fruticosa finder man Basaldelen meget for- 

 skjellig paa de forskjellige Exemplarer. Almindeligst er den noget 

 hult opsvulmet, dannet af en fast Membran, der former sig snart til 

 et Hør, snart til en hul Kugle, der er fyldt med graasort Ler, og fra 

 hvilke flere Stoloner udgaa. 



basal tubes there proceeds a long style, consisting of the 

 same membranous substance as the part from which it 

 proceeds. These styles are thin, and are adherent a 

 little above the basal root (fig, 1, a). In a few of the 

 smaller specimens, the basal portion forms only one 

 thick tube filled Avith alumina but, from it, several, more 

 or less, thick styles proceed, whilst, a few specimens 

 have a discoidal base 1 . The stem is cylindrical, and longi- 

 tudinally grooved, and it measures 35""" in circumference 

 at the base, but diminishes, somewhat, in thickness, up 

 towards the summit; it there becomes pretty narrow, and 

 from that point there proceed, 3 closely placed, thick, 

 short branches (fig. 1). About 12"™ above the basal part 

 may be observed, partly, a few polyps, partly, a few, short, 

 thick branches, which shoot out from the stem, round 

 about it; above that point, the branches increase, both 

 in number and size, so that the stem, on its uppermost 

 part, is well supplied with them. At the middle of the 

 ramous part of the stem, the branches are longest, and 

 measure, up to 20""" in length, and several branchlets are 

 seen upon them (fig. 1). Both, these and the branches 

 are richly beset with polyps which are placed so closely, 

 that they, in a measure, conceal the branches. 



What is stated above refers principally, however, to 

 the largest specimen; . in other specimens the stem is, 

 relatively, thinner, and the branches spring from the stem, 

 round about it, quite from the basal portion; they have 

 often branchlets richly beset with polyps. In two 

 specimens, the stem is bare for a rather considerable 

 extent, and its uppermost extremity ramifies into 2 — 3 

 chief branches, which are very thick, relatively short, and 

 furnished with a few branchlets, which, like the branches, 

 carry a "multitude of polyps. It is in these two speci- 

 mens that the basal portion is expanded discoidally 

 (fig. 1, A), 



The polyps are urceolate with broad tentacular 

 disks, and measure about 8""" in length (fig. 2). The 

 body measures 5""" in length, and is furnished with 8 

 spicular series. The tentacles are thick at the root, and 

 measure 3""" in length. The pinnules are rather long, and 

 narrow, and they, as well as the tentacles, are rich in 

 spicules (fig, 2). 



The entire Zoanthodem is rich in spicules. In the 

 basal portion with its styles, the spicules are placed 

 packed upon each other, and appear, principally, in the 

 form of bistellates, of which, a few approach in form 

 to the double-sphere with spicate extremities, and measure 

 0.112"™ in length, ånd 0.096""" in breadth at the extrem- 

 ities, and 0.032"'"" in breadth at the smooth mesial part 

 (fig. 3). The bistellates have, partly, a long, bare, mesial 



1 In Yæringia fruticosa, the basal portion is found to be 

 very variable in the different specimens. Most frequently, it is some- 

 what expanded, and formed of a firm membrane, which, sometimes, 

 takes the form of a hollow tube, and sometimes, the form of a hol- 

 low sphere which is filled with greyish-black Alumina, and from 

 which several styles proceed. 



