49 



Paa Téntaklernes aborale Side ere Spiklerne mindre, 



men danne langs Midtlinien en Længderække, hvori de 

 ligge meget tæt; takkede Spindler og Køller, lig dem paa 

 Kreppen, ere hyppige; de aftage i Størrelse, jo længere de 

 naa op paa Tentakelen, men imellem disse sees mange 

 forskjelligt formede, temmelig flade Spikler med Takker og 

 indskaarne Rande, fra 0.048—0.060""" lange og fra 0.008— 

 0.032 brede, Fig.' 76—81. 



Farven. 

 Bleggul, spillende lidt i det Kode 



Findested. 

 Station 164. Et storre og et mindre Exemplar. 



Artskarakter. 



Zoanthodemet indtil 70""" høit. Stammen ved Grunden 

 70""" i Omkreds, rund. furet, aftager temmelig pludselig i 

 Tykkelse. Basaldelen udvidet membranagtigt. Strax oven- 

 for Basaldelen enkelte tynde, korte Grene, bærende flere 

 Polyper. Hovedgrenene begynde længere oppe paa Stammen, 

 ere tykke, staa langt fra hverandre, dele sig i kort Afstand 

 fra Stammen i 2, og hver af disse forgrene sig i 3 — 4 Smaa- 

 grene, der hver hærer 4 — 6 Polyper. Disse ere cylindriske, 

 5"™ lange; Forkroppen noget udvidét, Bagkroppen smal, 

 temmelig lang. Polypkroppen og de 4 Rygtentakler for- 

 synede med Spikler. Hele Zoanthodemet rigt paa saadanne. 

 Spiklerne paa Basaldelen optræde væsentligt i Form af 

 knudede Bjelker, hvoriiuellem Soiler, Koller, Firlinger og 

 enkelte Spindler. Paa Stammens nedre Halvdel ere Dobbelt- 

 stjerner, Koller og Spindler de almindeligste; paa den øvre 

 Halvdel træffes Firlinger hyppigere end paa noget andet 

 Sted af Kolonien. Paa Polyperne er Spindelformen hyp- 

 pigst. Farven bleggul, spillende lidt i det Rode. 



Duva spitsbergensis, n. sp. 



Tab. III. Fig. 18—29. 



Zoanthodemet indtil 110""" høit. Stammen 45""" i Om- 

 kreds ved Grunden, furet eiter Længden og rundtom forsynet 

 med Grene fra den øverste Del ai Basalen til Toppen, Fig. 18. 



Den norske Nordhavsexpedition. D. ('. Danielssen: Alcyonida. 



0.040—0.120""" (figs. 73. 74). whilst others. which. however, 

 are extremely rare, approaeh more to the stellate form. 

 and measure 0.05(3""" in diameter (fig. 75). 



( >n the aboral side of the tentacles, the spicules are 

 smaller, but they form a longitudinal series along the mes- 

 ial line. in which they become set very closely; spicate 

 fusees and subclavates, like those of the body. are frequent; 

 they diminish in size the further up they exteml upon the 

 tentacle, but, between them, many variably-formed, rather 

 flat spicules, with spikes and indented margins are visible, 

 which measure from 0.048 — 0.060""" in length, and from 

 0.008- 0.032""" in breadth (fig. 76—81). 



Colour. 

 Pale yellow. shading a little towards brown. 



Habitat. 

 Station No. 164. A largish and a smaller speeimen. 



Specifle characteristics. 



The Zoanthodem measures up to 70""" in height. The 

 stem. at the base. measures 70""" in circumference, is cylin- 

 drical, grooved, and diminishes rather abruptly in thick- 

 ness. The basal part is membranaeeously dilated. Immed- 

 iately above the basal part. a few thin short branches 

 carrying several polyps. The main branches commence 

 further up the stem, air thick, and placed far apart from 

 each other; at a short distance trom the stem they ramify 

 into 2, and each of these again, ramifies into 3 — 4 branchlets, 

 each of which carry 4 —6 polyps. These are cylindrical 

 and 5""" in length. The anterior body somewhat dilated. 

 The posterior lindy narrow, rather long. The body of the 

 polyp, and the 4 dorsal tentacles, furnished with spicules. 

 The entire Zoanthodem rich in these. In the basal part 

 the spicules appear, principally, in the form of protubera- 

 ted beams, between which. columns, subclavates, quadruplets 

 and a few fusees. On the lower half part of the stem. 

 bistellates, subclavates, and fusees. are the most frequent. 

 and on the other half part quadruplets are more frequent than 

 in any part of the colony. In the polyps, the fdsiform 

 is the most frequent. Colour, pale yellow, shading a little 

 towards red 



Duva spitsbergensis. n. sp. 



Pl. III. figs. 18—29. 



The Zoanthodem measures up to 110™*" in height 

 The stem measures 45""" in circumference at the base: is 

 longitudinally grooved: and, round about it, is furnished. 



