57 



Polyperne ere bægerformede, 3""" lange med en kort, 

 smal Bagkrop, Fig. 84. Polypkroppen, som er omtrent 

 2""" lang. er temmelig bred op imod Mundskiven og meget 

 rig paa Spikler, der paa Forkroppen ordne sig i Rækker, 

 Fig. 84 ; kun den nederste Del af Bagkroppens Bugflade 

 er spikelfri. Tentaklerne ere 1.3""" lange, forsynede som 

 sædvanligt medPinnuler og have paa deres aboraleSide en 

 Længderække Spikler, der naa omtrent til Tentakelens 

 Midte, men herfra ligge de paatrers lige til Enden. Tab. 

 VI. Fig. 20. Båsaldelen og den nederste Del af Stammen 

 har Spikler; den øvrige Del af Stammen. Grenene og 

 Smaagrenene ere uden saadanne. 



Båsaldelen er meget rig paa Spilder, som optræde her 

 muler meget forskjellige Former. Den hyppigste synes at 

 være mere eller mindre sammensatte Stjerner, hvis Straaler 

 ere tykke med takkede Ender; de største have af og til 

 et smalt, nogent Midtbelte, ere 0.116""" lange, 0.104™ 

 brede; de mindre ere fattigere paa Straaler. fra 0.080 — 

 0.180""" lange og fra 0.056 — 0.064""" brede, og mange ere 

 kun i (Jdvikling, Fig. 85 — 90. Ikke fuldt saa hyppigt 

 som den sammensatte Stjerne med dens Udviklingsformer 

 forekommer dels vingeformigt udvidede, takkede Spindler 

 med mere eller mindre indskaarne Rande, fra 0.068 — ■ 



0.112' lange og fra 0.036-^0.060""" brede. Fig. 91, dels 



lige, takkede Spindler fra 0.060—0.076""" lange og fra 

 0.012—0.024""" brede. Fig. 92. 93; disse sidste ere dog 

 langt sjeldnere end hine. — Imellem de ovennævnte Spikler 

 iagttages af og til Firlinger, hvoraf enkelte ikke ere fuldt 

 udviklede og nærme sig Formen af sammensatte Stjerner, 



ere 0.112™" lange 0.068 ' brede, men lidt smalere paa 



Midten. Tab. VI. Fig. 1. 2. imedens andre nærme sig 

 Timeglasformen. ere 0.080""" lange, 0.044™" brede paa 

 Midten, men lidt bredere i Enderne, Fig. 3. Foruden 

 disse mindre udprægede Firlinger tindes der andre fuldt 

 udviklede. der have Korsformen; den ene af disse kors- 

 formede Firlinger er 0.112""" lang og lige saa bred, besat 

 jned Kunder. Fig. -i; den anden, der er meget rigt orna- 



nienteret med Lovværk, er 0.152 lang, 0.120""" bred, 



Fig. 5; denne pragtfulde Spikelform er dog sjelden. Ende- 

 lig træffes flere Former af Klubber; den ene Form er 

 kun svagt besat med smaa Knuder, har temmelig bugtede 

 Rande og er 0.116""" lang. 0.064""" bred foroven. Fig 6; 

 den anden er næsten ganske glat med skarpere Rand og 

 lidt indkneben paa Midten, er 0.100""" lang. 0.040""" bred. 

 Fig. 7. og den tredie Form er bladet med et kort. til- 

 spidset Skaft. 0.144""" lang. 0.080""" bred foroven. Fig. 8. 



crowded, and are. completely, concealed by the closely 

 grouped polyps (Pl. V. figs. 82. 83). 



The polyps are chalice-formed. measure •">""' in length, 

 and have a short narrow posterior body (Pl. V. fig. 84). 

 The body of the polyp, whdch is about 2" in length, is 

 rather broad up towards the oral disk. and very rich in 

 spicules, which. upon the anterior body. arrange themselves 

 in series (Pl. V. fig. 84). The lowest part of the ventral 

 surface of the posterior body is. alone, devoid of spicules. 

 The tentacles measure 1,3""" in length, aud are furnished, 

 as usual, with pinnules; on their aboral side there is a 

 longitudinal series of spicules whicfi extend to about the 

 middle of the tentacle, but from this point they are placed 

 transversally. right out to the extremity (Pl. VI, fig. 26). 

 The basal part. aud the lowest part of the stem. have 

 spicules; the rest of the stem. the branches, and the 

 branchlets are devoid of them. 



The basal part is very rich in spicules. and tln\ 

 appear, here, in very different forms. The most frequent 

 form appears to be. more or less complex, stellates, whose 

 rays are thick and have spicate extremities. The largest 

 have. uow and then, a narrow. bare. mesial belt, and mea- 

 sure 0.116"" in length and 0.104""" in breadth. The 

 smaller ones are not so rich in rays, and measure from 

 0.080—0.180""" in length and from 0.056—0.064""" in 

 breadth; many of them are only in process of development 

 (Pl. V. figs. 85 — 90). Not quite so frequent as the com- 

 plex stellate with its evoluting forms, there appear, partly. 

 pen nate dilated spicate fusees. with, more or less indented 

 margins, and measuring trom 0.068 — 0.112"'"' in length. 

 and from 0.036—0.060""" in breadth (Pl. V. flg. 91) partly. 

 straight spicate fusees. measuring from 0.060 — 0.076 m " in 

 length. and from 0.012—0.024""" in breadth (Pl. V. figs. 

 92. 93); these last are. however. far more rare than the 

 others. Between the above mentioned spicules. quadrup- 

 lets may. now and then, be observed. of which, a few are 

 not fully developed, and these approach in form to complex 

 stellates. and measure n.112""" in length. and 0.068""" in 

 breadth. but are a little narrower at the middle (Pl. VI. 

 figs. 1. 2); whilst, others approach to the hour-glass form, 

 and measure 0.080""" in length. and 0.044""" , in breadth at 

 the middle. but are a little broader at the extremities 

 (Pl. VI, fig. 3). Besides these less distinguished quadrup- 

 lets. other ones, fully developed, are fouhd, and these 

 have the cruci-form; the one of these cruci-form quadrup- 

 lets measures, 0.112""" in length. and the same in breadth. 

 and is beset with knots iPl. VI. fig. 4). The other. 

 which is very richly embellished with fretwork, measures 



0.152 in length, and 0.120""" in breadth (Pl. VI. fig. 5), 



this brilliant spicule-form is. however. rare: tinally. several 

 clavate-forms are met with; the one form is. only. sparingly 

 beset with small knots. and has rather indented margins; 

 it measures 0.116""" in length. and 0.064""" in breadth 

 above (Pl. VI, fig. 6). The second form is almost quite 

 smooth, has a more defined 'margin, and is also a little 

 constrieted at the middle; it measures 0.10(1"'" in length. 

 and 0.040 ' in breadth (Pl. VI. fig. 7); the third form 



Den norske Nordhavsexi>editiun. D. C. Danielssen: Alcyonida. 



