89 



brede ; hvor der er et nogent Midtparti, er dette i Regelen 

 fra 0.020—0.028""" bredt/ Fig. 9—15. Dobbeltstjernerne 

 ere smaa og sjeldnere, have som oftest et nogent Midt- 

 parti, men paa enkelte sees Midtpartiet at være besat med 

 smaa Torne; de ere fra 0.088—0.116'"'" lange og omtrent 

 0.080""" brede i Enderne, medens Midtpartiet er 0.040'"'" 

 bredt, Fig. 16. 17. Xoget hyppigere end Dobbeltstjerner 

 tindes Firlinger af forskjellig Form; enkelte danne et Kors, 

 hvis Længdestok er 0.180""" og Tverstok 0.100""", og som 

 er rigt besat med Blade, andre danne Rosetter, 0.148""" 

 lange, 0.140""" brede, og atter andre nærme sig Timeglas- 

 formen, ere 0.084""" lange, 0.080""" brede i Enderne og 

 0.036""" paa Midten, Fig. 18—20. Imellem disse forskjel- 

 lige Spilder sees hist og her enkelte, mindre udviklede, der 

 synes ikke at have antaget nogen bestemt Form ; de ere 

 fra 0.072—0.092""" lange, fra 0.032—0.036»"" brede op 

 imod Enderne og paa Midten fra 0.012—0.020'""' brede, 

 Fig. 21. 22. 



Paa Stammen ere Dobbeltstjerner. sammensatte 

 Stjerner, samt Klubber almindeligst. Dobbeltstjernerne 

 have brede, næsteii bladformige Straaler, hvis Ender dele 

 sig, og hvis nøgne Midtparti er meget langt; de ere fra 

 0.104—0.120""" lange og fra 0.060—0 096""" brede i 

 Enderne med et Midtparti, der er fra 0.016—0.024""" 

 bredt, Fig. 23 — 25. De sammensatte Stjerner have saa 

 brede og takkede Straaler. at det har sine Vanskelig- 

 heder at gjenfinde Stjerneformen paa mange af dem; 

 de ere fra 0.121—0.160'»'" lange og fra 0.072—0.128""» 

 brede, enkelte ere lidt smalere paa Midten, og paa dem 

 viser der sig da et tyndt, nogent Belte, Fig. 26—29. Klub- 

 berne ere stærkt bladede, have et temmelig kort Skaft og 

 ere forskjellige fra dem paa Basaldelen, hvilket bedst sees 

 ved at sammenligne Figurerne; de ere fra 0.108 — 0.144'""' 

 lange og fra 0.060—0.120""» brede foroven, Fig. 30- 33. 

 Imellem Klubberne sees enkelte, skaftede Stjerner, eler 

 muligens ere ei fuldt udviklede Dobbeltstjerner, da der paa 

 Skaftets Ende er Takker, som kunne være endnu ikke ud- 

 voxede Straaler; de ere 0.180""" lange, 0.080""» brede i 

 den egentlige Stjerne, medens Skaftet er kun 0.024""" bredt. 

 Fig. 34. Endelig tindes, men yderst sjeldent, en mindre 

 udviklet Dobbeltstjerne, der er 0.088""» lang, 0.044""" bred 

 i Enderne og 0.020""" bred paa det nøgne Midtparti. Fig. 35. 



Paa Grenene optræder Dobbeltstjernen som den hyp- 

 pigste Repræsentant, sjeldnere er den sammensatte Stjerne, 

 imedens Klubberne ere temmelig almindelige. Dobbelt- 

 stjernerne have brede, bladformige Straaler, som ere mere 

 eller mindre takkede i Enderne og have et nøgent Midt- 



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



measure from 0.120 — 0.164""" in length, and from 0.064 — 

 0.080""" in breadth. The mesial part, when bare, usually 

 measures from 0.020—0.028'»"' in breadth (Pl. XII. figs. 

 9 — 15). The bistellate spicules are small and more 

 rare, and, most frequently, have a bare mesial part but, 

 in a few, the mesial part is observed to be beset with 

 minute aculeæ. They measure from 0.088—0.116"'"' in 

 length, and about 0.080"'»' in breadth at the extremities. 

 whilst the mesial part measures 0.040""" in breadth (PI. XII, 

 figs. 16. 17). Somewhat more frequently than the bistellates, 

 quadruplets of a variable form occur; a few form a 

 crucifix, whose longitudinal arm measures 0.180""", and the 

 transversal arm 0.100""» in length, and these are richly 

 beset with leaves; others form rosettes measuring 0.148""" 

 in length, and 0.140""" in breadth, and, again, others 

 approach in form to a sand-glass, and measure 0.084""" in 

 length, 0.080 7 "™ in breadth at the extremities, and 0.036"*°* 

 in the middle (PI. XII, figs. 18—20). Between these 

 various spicules, a few imperfectly developed ones are, here 

 and there, observed, which do not appear to have acquired 

 any definite form. They measure from 0.072—0.092""» in 

 length, from 0.032—0.036""" in breadth, up towards the 

 extremities, and from 012—0.020""" in breadth at the 

 middle (PL XII, figs. 21. 22) 



Bistellates, complex stellates, and clavates are the 

 most frequent spicular forms on the stem. The bistellates 

 have broad, almost foliate, rays whose extremities divide, 

 and whose bare mesial part is very long. They measure 

 from 0.104—0.120»"" in length, from 0.060—0.096"™ in 

 breadth at the extremities, the mesial part measuring 

 from 0.016—0.024""» in breadth (PI. XII, figs. 23. 25). 

 The complex stellates have such broad and spicate rays 

 that, it is with difficulty the stellate form can be recognised 

 in many of them. They measure from 0.121 — 0.160""" in 

 length, and from 0.072 — 0.128""" in breadth; a few are a 

 little narrower in the middle, and, in them, a thin, bare, 

 stripe shows itself (PI. XII, figs. 26—29). The clavates 

 are strongly foliated, have a rather short shaft, and they 

 differ from those of the basal part; this is best observed 

 by comparing the illustrative figures. They measure from 

 0.108—0.144»"» in length, and from 0.060—0.120'""' in 

 breadth above (PI. XII, figs. 30—33). Between the clav- 

 ates, a few shafted stellates are observed, which are, possibly, 

 partially developed bistellates, because, on the extremity of 

 the shaft, spikes appear, which may probably be rays not 

 yet developed. They measure 0.108""" in length, and 

 0.080""" in breadth through the star itself, whilst the shaft 

 only measures 0.024""" in breadth (PI. XII, fig. 34). 

 Finally, but extremely rarely, an imperfectly developed 

 bistellate is found, which measures 0.088""» in length, 

 0.044""" in breadth at the extremities, and 0.020""" in 

 breadth at the bare mesial part (PI. XII, fig. 35). 



On the branches, the bistellate form appears as the 

 most frequent spicular representative, more rarely do com- 

 plex stellates occur, whilst the clavates are rather frequent. 

 The bistellates have broad foliate rays which are more or 

 less spicate at the extremities, and they have a bare mesial 



12 



