129 



Paa Tentaklerne sees almindeligst lignende Køller 

 og Spindler som paa Forkroppen; men desforuden træffes 

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



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



0.020—0.036 brcdr. Fig. 45. Paa Pinnulerne ere 



Spiklerne mest spindelformede og sinaa. 



De Spilder, som forekomme i Ooenenchymet, ere for 

 Storstedelen takkede Spindler. 



Med Undtagelse af et vare alle de Exemplarer, som 

 bleve fundne paa Expeditionen, fæstede til dode Skaller af 

 Astarte crenata, Grav. 



Farven. 



Farven er hvid. men naar Polyperne ere fuldt ud- 

 strakte. er Zoanthodemet vandklart. spillende lidt i det Gule 



Findested. 

 Station 338. 5 Exemplarer. 



Slægtskarakter. 



Stammen bar faa, men udprægede L;engdekanaler ; 

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

 Krandse omkring Stammen med nogne Mellemrum, bærende 

 paa de udvidede Ender Polyperne. Polypcellerne adskilte 

 ved et bredt Coenencbym. Polyperne retraktile. Stamme. 

 Grene. Coenenchym og Polyper spikelholdige. Svælget 

 uden Spilder. 



Artskarakter. 



Zoanthodemet indtil 20""" hoit. gjennemsigtigt. Stam- 

 men blød. omtrent 12""" i Omkreds ved Granden, udvidende 

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

 dens nederste Del nøgen. Basaldelen lidt udvidet, fæstet 

 til dode Skaller. Grenene kurte, tykke, brede ved Granden, 

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

 og stillede kransformigt om Stammen med nogne Mellem- 

 rum. Polypcellerne halvrunde, vel adskilte ved Coenenchym. 



Polyperne retraktile, cylindriske. 10- -12 lange med 8 



adskilte Længderækker Spilder, samt en udviklet Bagkrop. 

 Opimod Tentakelranden et triangulært, nøgent Felt imellem 

 hver 2 Tentaklers Grand, hvori 2 — 3 Spikler. Tentaklerne 

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



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



(the ravs) tenninate, partly. in a small star. and the middle 

 part is bare. They approach, muen, 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 — 0.1(30""" 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. Grav. 



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. 



Speciflc characteristics. 



The Zoanthodem measures up to 20""" in height, 

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

 cumference at the base, becomes dilated in subelaviform 

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

 part bare. The basal part a little dilated aud 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. have 8 separ- 

 ated longitudinal series of spicules, and a dilated posterior 

 body. Up towards the tentacular margin, a triangular 



17 



