124 



Krystallofanes 1 polaris, n. g. et sp. 



Tab. XIX. Fia-. 1—45. 



Zoanthodemet indtil 2U""" høit. Stammen omtrent 



1 2 i Omkreds ved Grunden, men udvider sig næsten 



kølleformigt i Toppen, der er godt besat med Polyper, 

 liloil og gjennemsigtig, svagt riflet paalangs af de store 

 Længdekanaler og paa dens nederste Del nogen i en 

 Hoide af 5""" fra Basaldelen. Fig. 1. Denne er tynd. 

 tast. membranagtig og kun lidet udvidet. Grenene danne 

 tykke, korte, meget brede, gjennemsigtige Lapper, der om- 

 give Stammen næsteD krandsformigt med store Mellemrum, 

 idet nemlig hver Krands. hvoraf der er høist 3, staa langt 

 fra hverandre, saa at Stammen stykkevis bliver blottet. 

 Fig. 1. Enhver Gren er nogen og noget smal ved sit 

 Qdspring, men bliver bredere mod Enden og bærer en 

 Samling af 6 — 8 Polyper. hvis Celler staa tæt i hverandre 

 uden at være sammenvoxede, idet et smalt Coenenchym 

 adskiller dem, 



Polypcellerne ere halvkugledannede, tæt besatte meil 

 Kalk. og naar Polypen begynder at trække sig ind. ser 

 det iul, som om Cellens Rand har 8 Tiender; er Polypen 

 fuldt udstrakt, sees vanskelig nogen Grændse niellem drus 

 Bagkrop og Cellen: thi de gaa saagodtsom umærkeligt over 

 i hinanden; kun derved, at Spiklerne paa Cellen ligge 

 tættere til eller paa hverandre, end paa Bagkroppen. kan 

 de vedHjælp af Loupe eller stærkere Forstørrelse adskilles, 

 Fig. 2. a. 



Polyperne ere retraktile, cylindriske, omtrent ln — 12 



lange, med en udviklet Bagkrop. Denne er omtrent o 

 lang, forsynet med 8 Længderækker Spiklcr, sum ere vel 

 adskilte ved et nogent, gjennemsigtigt Mellemrum. T hvert 

 Spikelfelt er der i Regelen 3 Rækker Spilder, som ligge 

 lidt paaskraas, Fig. 2, b. Forkroppen er 3 — 4""" lang og 

 lidt indkneben, hvor den gaar over i Bagkropen, men ud- 

 vider sig op mod Tentakelskiven og er vel forsynet med 

 Spikler, der her ligge paatvers i Begyndelsen, men skraane 

 stærkt af mod Tentakelskiven. hvor de ordne sig i Rækker, 

 som forend de gaa over paa Tentaklerne. vige fra hver- 

 andre og danne triangulære Felter, fra hvis spidse Vinkel 

 udgaar en kort Række Spikler, Fig 2. r. Mundskiven er 

 næsten flad med en aflang Mundspalte. Tentaklerne 3 — 4""" 

 lange, temmelig tykke ved Grunden og paa deres aborale 

 Side pantsret med Spiklerne; Pinnulerne staa temmelig 

 tæt, ere tykke og forsynede med Spikler, Fig. 2. 



1 At' xpucraXXo?, en Krystal og shmo?, lysende. Paa Tavle 

 XIX staar Chrysofanes, skal være Krystallofanes. 



Krystallofanes 1 polaris, n. g. et sp. 



Pl. XIX. figs. 1-4:.. 



The Zoanthodem measures up to 21)""" in height. 

 The stem measures about 12""" in circumferénce. at the 

 base, but becomes somewhat dilated, in subclaviform, at 

 the top. which is well covered with polyps. It is sutt and 

 transparent, slightly grooved longitudinally. by the large 

 longitudinal ducts, and, in its lowest part. is bare for a 

 height of 5""" from the base (fig. 1). The basal part is 

 thin. hard, and membranaceous, and it is univ slightly 

 dilated. The hranches oecuras short. thick. very broad, trans- 

 parent excrescences, which surround the stem almost in 

 wreaths. having wide intervals between them owing to eacli 

 wreath, of which there are 3 at the must. being situated far 

 apart from the adjacent one, causing the stem, in poitions, 

 tu be exposed (fig. 1 ). Every branch is bare, and rather 

 naiTOwat its root, hut becomes broader towards the extremity 

 and bears a collection of 6 — 8 polyps, whose cells are 

 placed close up to each other without, however, heing 

 concreted togethei - , as a slender sarcosoma separates them. 



The polyp-cells are semispherical in form. and are 

 closely covered with calcium; when the polyp begins to 

 retract itself, it appears as if the margin of the cell has 

 8 teethj hut when the polyp is fully extended, it is with 

 difficulty that auy margin can be seen between its posterior 

 body and the cell, because- they pass into each other, 

 or are absorbed the one into the other, almost imperceptibly. 

 The transition ur margin can univ he recognised with the 

 assistance of a magnifier, or on considerable magnification, 

 from the fact that the spicules of the cell lie duser to, or 

 upon. each other than on the posterior body (ri-:. 2. a). 



The polyps are retractile, cylindrical, and nieasure 



about LO — 12 in length. and they have a. developed 



posterior body which measures about o""" in length, 

 and is furnished with 8 longitudinal series of spicules, 

 well separated by a hare. transparent, interval. In each 

 spicular area there are, as a rule, 3 series of spicules. 

 which are placed a little diagonally fri".. 2. &). The 

 anterior body measures 3 — 4""" in length. and is a little 

 constricted at the point where it passes over into the 

 posterior body, but it becomes dilated in the proximity 

 of the tentacular disc, aud is well supplied with spicules 

 which, here, are placed, at the commencement, transversally, 

 but slope quickly off towards the tentacular disk. where 

 they become arranged in series which, before they pass 

 over to the tentacles, diverge from each other and form 

 triangular spaces, from whose acute angle a short series 

 of spicules issues (fig. 2, c). The oral disk is almost flat. 



1 From xpuuTvX/.o? = a crystal — cpa-ioc = gleaming. 

 Erratum: Owingto a clerical error, the appellation Chri/sofam 

 erroneously printed on Pl. XlXinstead el' thecorrect one, Kiystallof 'anes. 



