129 



Paa Tentaklerne sees almindeligst lignende Køller 

 og Spindler som paa Fortroppen; men desforuden træffes 

 især til Siderne og op mod Enden mindre, mere fladtrykte, 

 takkede Spilder, der ere fra 0.120—0.160— lange og fra 

 0.020—0.036""" brede, Fig. 45. Paa Pinnulerne ere 

 Spiklerne mest spin delf ormede og smaa. 



De Spilder, som forekomme i Coenenchymet, ere for 

 Størstedelen takkede Spindler. 



Med tlndtagelse af et vare alle de Exemplarer, som 

 bleve fundne paa Expeditionen, fæstede til døde Skaller af 

 Astarte crenata, G-rav. 



Farven. 



Farven er hvid, men naar Polyperne ere fnldt ud- 

 strakte. er Zoanthodemet vandldart, spillende lidt i det Gule 



Findested. 



Station 338. 5 Exemplarer. 



Slægtskarakter. 



Stammen har faa, men udprægede Længdekanaler ; 

 dens Top er rig paa Polyper. Grenene korte, stillede i 

 Kran ds e omkring Stammen med nøgne Mellemrum, bærende 

 paa de udvidede Ender Polyperne. Polypcellerne adskilte 

 ved et bredt Coenenchym. Polyperne retraktile. Stamme, 

 Grene, Coenenchym og Polyper spikelholdige. Svælget 

 uden Spilder. 



Artskarakter. 



Zoanthodemet indtil 20""" høit, gjennemsigtigt. Stam- 

 men blød, omtrent 12"™ i Omkreds ved Grunden, udvidende 

 sig kølleformigt i Toppen, der er tæt besat med Polyper; 

 dens nederste Del nøgen. Basaldelen lidt udvidet, fæstet 

 til døde Skaller. Grenene korte, tykke, brede ved Grunden, 

 udvidende sig mod Enderne, som hver bærer 6 — 8 Polyper 

 og stillede kransformigt om Stammen med nøgne Mellem- 

 rum. Polypcellerne halvrunde, vel adskilte ved Coenenchym. 

 Polyperne retraktile, cylindriske. 10 — 12""" lange med 8 

 adskilte Længderækker Spikier, samt en udviklet Bagkrop. 

 Opimod Tentakelranden et triangulært, nøgent Felt imellem 

 hver 2 Tentaklers Grund, hvori 2 — 3 Spilder. Tentaklerne 

 3 — 4""" lange, pantsrede med Spilder. Pinnulerne staa tæt 



Den norske Nordhavsexpedition. D. C. Danielssen; Alcyonida. 



(the rays') terminate, partly, in a small star, and the middle 

 part is bare. They approach, much, in form to the double- 

 sphere, and measure 0.096'""' in length, and 0.068""" in 

 breadth at the extremities, and have a mesial stripe 0.036""" 

 in breadth (fig. 44). 



On the tentacles, clavates and fusees similar to 

 those of the anterior body are, most frequently, observed, 

 but, besides these, especially to the sides and in proximity 

 to the extremities, small, more flattened, spicate spicules 

 are met with, which measure from 0.120 — 0.160'"'" in 

 length, and from 0.020—0.036""" in breadth (fig. 45). On 

 the pinnules, the spicules are principally fusiform, and 

 small. 



The spicules which occur in the sarcosoma are, for 

 the greater part, spicate fusees. , 



With the exception of a single one, all the specimens 

 which were obtained on the expedition were adherent to 

 the dead shells of Astarte crenata, Gray. 



Colour. 



. 



The colour is white, but when the polyps are fully 

 extended the Zoanthodem is pellucid, shading a little towards 

 vellow. 



Habitat. 

 Station No. 338. Five specimens. 



Generic characteristics. 



The stem has few, but distinct, longitudinal ducts; 

 its summit is rich in polyps. The branches short, placed 

 in wreaths around the stem so as to leave bare intervals, 

 and they carry the polyps on their dilated extremities. 

 The polyp-cells are separated by a broad sarcosoma. The 

 polyps retractile. The stem, branches, sarcosoma, and 

 polyps contain spicules. Gullet devoid of spicules. 



Specific characteristics. 



The Zoanthodem measures up to 20 mm in height, 

 transparent. The stem soft, measures about 12'"'" in cir- 

 cumference at the base, becomes dilated in subclaviform 

 at the summit, which is closely beset with polyps ; the lowest 

 part bare. The basal part a little dilated and adherent 

 to dead shells. The branches short, thick, broad at the 

 root, become dilated towards the extremities, each of which 

 carries 6 — 8 polyps, and they are placed in wreaths, around 

 the stem, so as to leave bare intervals. The polyp-cells 

 semi-circular, well separated by sarcosoma. The polyps 

 retractile, cylindrical, 10 — 12""" in length, havæ 8 separ- 

 ated longitudinal series of spicules, and a dilated posterior 

 body. Up towards the tentacular margin, a triangular 



IT 



