130 



sammen, ere tykke og forsynede med Spikler. Paa Basal- 

 delen er Spikelformen hyppigst Firlinger, Dobbeltstjerner 

 og Spindler; paa Stammen, Valser og Koller; paa Poly- 

 perne Koller, Spindler, Klubber og i Coenencbymet Spindler. 



Underfamilie Organinæ, mihi. 



Oiyanidus Nordenskjoldi, n. g. et sp. 



Tab. XIX, Fig. 46—70. Tab. XX, Fig. 1—44. 



Zoanthodemet indtil 20""" hoit. Stammen er lige tyk 

 overalt, omtrent 25""" i Omfang og dannet af en Samling 

 Poljper, hvis lange, rørformige Celler ere sammenvoxede 

 efter hele Længden, hvorved det Hele faar nogen Lighed 

 med en Samling Orgelpiber, Tab. XIX, Fig. 46. Ikke alle 

 Celler (Calyx) ere lige lange, hvorved der dannes ligesom 

 Afsatser paa Stammen; men hvad enten de ere korte eller 

 lange, lobe de lige ned til Basaldelen. De længste og 

 videste Celler ere noget indknebne paa Midten, omtrent 

 der, hvor de korte Celler ende foroven, Fig. 46. a, men 

 udvide sig meget snart igjen, for senere at beholde sin 

 tidligere Vidde. 



Cellerne, der ere cylindriske, glatte og glindsende-, 

 lobe ikke ganske parallelle ved Siden af hverandre, men 

 bugte sig tildels temmelig meget, uden dog at den ene 

 Celle omslynger den anden. De ere i udstrakt Tilstand 

 fuldkommen vandklare og saa gjennemsigtige, at Septula 

 sees tydeligt i hele Længden; de kunne trække sig lidt 

 sammen og blive da mindre klare ; men naar Polyperne ere 

 fuldt udstrakte. svulme Cellerne stærkt op. og da er hele 

 Zoanthodemet gjennemsigtigt ; kun ved Hjælp af Loupen 

 sees Kalkafsætningerne i Huden, hvilke ordne sig i Rækker. 

 Cellens øverste Ende gaar over i Polypen, eller, om man 

 vil, denne gaar over i Cellen, og der, hvor Overgangen 

 linder Sted, ei' en liden Indsnoring, idet Polypkroppen her 

 udvider sig noget ; men nogen tydelig Grændse er der ikke, 

 Fig. 46, b. Cellen kan derfor betragtes som Polypens 

 Bagkrop; thi i den forhenger Mavehulheden sig lige ned til 

 Basalen. Cellernes Antal er væsentligt afhængigt af Kolo- 

 niens Størrelse. Paa de største Exemplarer er der henved 4< ». 



cpY<M0-» 



Orgel. 



bare area between the bases of each 2 tentacles, occup- 

 ied by 2 — 3 spicules. The tentacles 3 —4""" in length, 

 sheathed with spicules. The pinnules placed close to each 

 other, thick and furnished with spicules. On the basal 

 part, the spicular forms whieh are most frequent are 

 quadruplets. bistellates, and fusees; the most frequent forms 

 on the stem are cylinders and subclavates. On the polyps, 

 the most frequent spicular forms are subclavates, fusees, 

 and clavates ; and in the sarcosoma fusees. 



Sub-Section Organinæ, mihi. 



Organidus 1 Nordenskjoldi, n. g. et sp. 



Fl. XIX. figs. 4ti— TØ. Pl. XX, figs. 1—44. 



The Zoanthodem measures up to 20"'"' in heiglit. 

 The stem is uniform in thickness throughout, and measures 

 about 25""" in circumference; it is formed of a collection 

 of polyps whose long tubular cells are concreted together 

 throughout their entire length. giving to the whole struc- 

 ture, somewhat, the appearance of a collection of organ 

 pipes (Pl. XIX. fig. 46). The cells (Calyx) are not all 

 uniform in length, forming, thus, as it were, terraces upon 

 the stem. hut whether they are short or long they extnul 

 quite down to the basal part. The longest and widest 

 cells are somewhat constricted at the middle, at about the 

 point where the short cells terminate above (Pl. XIX, 

 fig. 46, a), but they very soon become dilated again so as 

 to, subsequently, retain their previous width. 



The cells, which are cylindrical, smooth. and shining, 

 do not run quite parallel alongside of each other. but 

 bulge out, sometimes, ■ a good deal, without, however, the 

 one cell entwining the other. In the extended state they are 

 quite pellucid and are. tlien. so transparent that the sep- 

 tula can be distinctly observed throughout the entire length; 

 they are capable of contracting together a little, and are, 

 then, not quite so pellucid, but when the polyps are fully 

 extended the cells swell strongly up and, then. the entire 

 Zoanthodem is transparent; with the assistance of a mag- 

 nifying glass, alone, can the calcareous deposits in the 

 integument be observed; these are arranged in series. The 

 uppermost extremity of the cell passes over into the 

 polyp, or it may be said that the latter passes over into 

 the cell, and at the point where the transition occurs there 

 is a small constriction, caused by the body of the polyp 

 becoming somewhat dilated there, but there is no distinct 

 margin (Pl. XIX. fig. 46, b). The cell may, therefore, 



of-yaiot 



Organ. 



