121 



med 8 Rækker Spilder, Fig. 33. og paa dets indre Flacle 

 sees^langs Bugsiden en temmelig smal. halvruncl Svælggrube, 

 der er beklædt med lange Pidskeceller, som ikke afvige i 

 Form fra de ved saa mange Arter tidligere beskrevne 

 G-eisselceller, imedens de her dog synes at være noget 

 kortere, Fig. 32, /. Der, livor Svælggruben begrændses til 

 Siderne, er en Fold, som danner et Fremspring i Svælg- 

 hnlheden, Fig. 32, g. hvorved denne under Svælgets Sammen- 

 snøring ligesom deles i to Længdehulheder, saaledes at den 

 meget videre Hulhed følger Rygsiden og kan betragtes som 

 Tarmrør. imedeus den smalere udgjør Svælggruben eller 

 det egentlige Spiserør (Øsophagus). I Mavehulheclen er 

 langs Septula Kjønsorganerne, eler som sædvanligt beståa 

 af stilkede Kapsler, hvori Kjønsproduktet udvikles, og som 

 her bestod af Æg i forskjellige Stadier, uden at nogen 

 Embryodannelse synes at være begyndt. 



Paa Basaldelen ligge Spiklerne pakkede tæt sammen. 

 Dobbeltstjernen og Firlingen er den hyppigste Form, hvor- 

 under cle optræde. men imellem dem sees enkelte Spindler; 

 Dobbeltstjernerne ere dels 3-, dels 4 — Gstraalede; undertiden 

 er den ene Ende af Spikelen mere uclviklet end den anden. 

 Straalerne ere mere og mindre brede, mere og mindre 

 takkede i Enderne ; de have som oftest et nøgent Midt- 

 belte, men stundom kan dette ogsaa være indtaget af en 

 Tak eller Straale ; de ere fra 0.056— 0.084""" lange og fra 

 0.024— 0.064"™ brede i Enderne med et fra 0.008—0.036'"'" 

 bredt Midtbelte, Fig. 34. 35. 36. 37. 38. 39. Firlingerne 

 vise sig dels i mere eller mindre udpræget Korsform, dels 

 som smukke Stjerner, hvis Straaler stundom ere delte, og 

 dels som Rosetter; men alle ere besatte med større eller 

 mindre Papiller; de korsformede ere fra 0.060 — 0.064""" 

 lange med en Tverstok fra 0.044—0.056™'", Fig. 40. 41; 

 de stjernedannede ere omtrent lige lange som brede, fra 

 0.056—0.080""» i -Tversnit, Fig. 42. 43, og Bosetterne ere 

 0.060""" lange, 0.056""" brede, Fig. 44. 45. Spincllerne ere 

 uregelmæssige med som oftest afstumpede Ender og takkede, 

 0.112""" lange o^ 0.060'"'" brede. Fig. 46. 



Paa Stammen ligge Spiklerne paa hverandre uden 

 egentlig at være sammenpakkede som paa Basalen. Ogsaa 

 her synes Dobbeltstjernen at være den hyppigste; Firlinger 

 forekomme noget sjeldnere, men langt sjeldnere er den sammen- 

 satte Stjerne og Spindelen, og kun enkeltvis sees en Klubbe. 

 Dobbeltstjernerne variere her meget; nogle have overordentlig 



Den norske Nordhavsexpeditioii. I). C. Danielsseu: Alcyonida. 



everywhere, clad with a layer of globular endothelial cells 

 like those found in the ducts of the stem (PI. XXI. 

 fig. 32, e). The gullet-tube is very wide and cylindrical; 

 it is furnished with 8 series of spicules (PI. XXI, fig. 33), 

 and on its inner surface, along the ventral side, there is 

 seen a pretty narrow, semicircular, gullet-groove which 

 is clad with long flagelliform cells not differing in form 

 from those (Greissel-cells) previously described in connec- 

 tion with so many species, whilst they, here, however, 

 appear to be somewhat shorter (PI. XXI, fig. 32, /). At 

 the point at the sides, where the gullet-groove ceases, 

 there is a fold which forms a projection into the gullet- 

 cavity (PI. XXI, fig. 32, g). causing the latter, on the 

 gullet contracting together, to be, as it were, divided into 

 two longitudinal cavities, in such manner, that the very 

 much widest of these two cavities runs along the dorsal 

 side, and may be considered as an intestinal canal, whilst 

 the smaller one serves as the gullet-passage, or the real 

 alimentary-tube (Oesophagus). The reproductive organs 

 are found along the septula, in the gastral cavity, and 

 they, as usual, consist of pedunculated capsules in which 

 the sexual product is developed, and which, here, consisted 

 of ova in various stages of development without, however, 

 any embryonal formation appearing to have begun. 



On the basal part, the spicules are situated closely 

 packed together. Bistellates and quadruplets are the most 

 frequent forms in which they appear, but between these 

 a few fusees are, also, seen. The bistellates are, partly 3-, 

 partly 4 — 6 rayed; sometimes the one extremity of the 

 spicule is more developed than the other, and the rays 

 are more or less broad and more or less spieate in the 

 extremities ; they have most frequently a bare middle stripe 

 but, sometimes, that may also be occupied by a spike or 

 ray ; these bistellates measure from 0.056 — 0.084""" in 

 length, and from 0.024 — 0.064""" in breadth at the extre- 

 mities, and they have a middle stripe measuring from 

 0.008—0.036""" in breadth (PI. XXI, figs. 34. 35. 36. 37. 

 38. 39). The quadruplets present themselves in more or 

 less distinct cruciforms, partly, as beautiful stars whose 

 rays are sometimes ramous, and partly as rosettes, but 

 all of them are beset with larger or smaller papillæ; the 

 cruciforms measure from 0.060 — 0.064'""' in length, and 

 have a transversal arm Avhich measures from 0.044 — 0.056""" 

 (PI. XXI, fig. 40. 41); the stelliforms measure about the 

 same in length as in breadth, being from 0.056 — 0.080""" 

 in diameter (PI. XXI, figs. 42. 43) and the rosettes mea- 

 sure 0.060'"'" in length, and 0.056""" in breadth (PI. XXI, 

 figs. 44. 45). The fusees are irregular but, most usually, 

 have blunted extremities, and are spieate ; they measure 

 0.112"™ in length, and 0.060™'" in breadth (PI. XXI, 

 fig. 46). 



On the stem, the spicules are placed upon each other 

 without really being packed together, as is the case on 

 the base. Also, here, the bistellate appears to be the 

 most frequent spicular form met with. Quadruplets appear 

 somewhat more rarely, but the complex stellate and fusee 

 are far more rare, and quite exceptionally is a clavate 



16 



