36 



hvor Polyperne fortrinsvis sidd.'. Polypcellerne runde, staa 

 tæt i hverandre og forsynede med 8 adskilte, spikelrige 

 Længderibber, hvorimellem en smal, nøgen Fure. eler op 

 uiidil Cellens Rand udvider sig til et triangulært Rum. 

 Polyperne 5 — 6""" lange, cylindriske, udvidende sig trakt- 

 formigt imod Tentakelskiven, hvor der tindes 8 trekantede, 

 nøgne Felter, rigt besatte med Neniatocyster. Tentaklerne 

 halv saa. lange som Kroppen, forsynede med Spilder paa den 

 aborale Flade. Pinnulerne uden Spikler; saavel paa disse 

 som paa Tentaklernes adorale Side samt paa Mundskiven 

 en Mængde Nematocyster. Paa Basaldelen væsentligst 

 Dobbeltstjerner ; paa Stammen fornemmelig sammensatte 

 Stjerner og særegne brede, rigt ornameiiterede Spikler; 

 paa Polypcellen elliptiske Spindler, Dobbeltstjerner og eien- 

 dommelige Firlinger; paa Polypkroppen hovedsagelig lange, 

 dels krumme, dels lige, takkede Spindler; saa godt som 

 overalt ere Spiklerne ligesom overstrøede meil tine Kalk- 

 korn; paa Svælget to Rækker spredte, flade, uregelmæssige 

 Spikler. Farven gul. 



I et tidligere Arbeide 1 at .1. Kuren og mig er op- 

 stillet Slægten Duva og karakteriseret saaledes: 



"Zoanthodemet trædannet, stærkf forgrenet. Stammens 

 Basaldel bred. Hovedgrenene lange, binde, bøielige, enten 

 dele sig i Smaagrene, disse i tiere Stilke, der hver 

 bærer paa. deres Ender flere Polyper, eller forblive udelte, 

 men pgsaa da bære paa Enden en Samling af Polyper. 

 hvilke dels ere sammenvoxede ved Grunden, dels skilte ved 

 et smalt Coenenchym. Polyperne ikke retraktile, kurte. 

 men vel udviklede. forsynede med lange, spindelformede, 

 takkede Spikler. Grenene og Smaagrenene uden Kalk. 

 Spiklerne i Stammen dels mangestraalede, korte Spindler, 

 dels simple Dobbeltstjerner. ikke synbare for blotte Øie. 

 Septa uden Kalk." 



Senere Undersøgelser have gjort det nødvendigt at 

 foretage nogen Forandring veil denne Karakteristik. 

 Der er nemlig fundet paa den norske Nordhavsexpedition 

 ikke mindre end 8 nye Arter, som jeg tinder at innatte 

 henføre til Slægten Duva, omendskjont tiere at' dem afvige 

 fra. den oprindelig givne Skegtskarakter derved, at der 

 tindes Kalkspikler saavel i Stammen som i (Trenene. At 

 danne en ny Slægt for disse anser jeg ikke fornødent; thi 

 naar undtages Kalkafsætningen i Stamme og Grene, saa 

 have de baade i deres ydre og indre Bygning saameget 

 tilfelles, at en Adskillelse i to Slægter ikke vil kunne be- 

 grundes. Hertil kommer, at jeg Ims enkelte Arter har 

 fundet Antydninger til Overgange, idet der nemlig enten 



' Bergens Museum. Nye Alcyonider, Gorgonider og Penna- 

 tulider, tilhørende Norges Fauna ved J. Koren og D. C. Danielssen. 

 Pag. i. Bergen Iss;. 



closely enveloping branches. These are thiek and short, 

 and at the extremities they become dilated in spheriform, 

 the polyps being especiallj situated there. The polyp-cells 

 are cylindrical, and placed close to each other; they are 

 fumished with 8 separated, longitudinal ribs rich in spicules, 

 between whieh there is a narrow bare furrow that. in proximity 

 to the margin of the cell. becomes dilated to a. triangular 

 space. The polyps 5 — 6""" in length, cylindrical, dilating, in 

 proximity to the tentacular disk. in infundibuli form. 

 where, 8 triangular bare areas richly occupied by nema- 

 tocysts are found. The tentacles are half the length of 

 the body. and are fumished with spicules on their aboral 

 surface. The pinnules are devoid of spicules. On the 

 pinnules. and also on the adoral side of the tentacles. a 

 multitude of nematoeysts are found. On the basal part, 

 principally, bi-stellate spicules. On the stem. principally, 

 complcx stellates and peculiar, broad, richly ornamented, 

 spicules. On the polyp-cell, elliptic fusees, bistellates and 

 peculiar quadruplets. On the polyp-body, principally, long, 

 parth bent, partlj straight, spicate fusees, almost everywhere 

 the spicules are. as it were, overstrewed with minute, cal- 

 careous grannules. <>n the gullet, two series of scattered, 

 flat. irregular spicules. The colour yellow 



In a previous 1 work, by J. Koren and myself, 1 have 

 proposed tu form the genus Duva and distinguished it tims : 

 "The Zoanthodem aborescent, strongly ramous. The'' 

 -basal part of tic stem broad. The main branches long," 

 ••soft. hVxihle. and ramifying, either into branchlets, and" 

 •'these. again, into small stalks each of which carries mi its" 

 "extremity several polyps; or they remain entire, but in" 

 -that case. also, they carry on the extremitj a collection" 

 -of polyps 'which. partly, an- concreted together at the"' 

 -lunt. and partly, are separated by a narrow sarcosoma.'' 

 -The polyps non-rctractilc short, but well developed, and" 

 "furnished with long. fusiform, spicate spicules. The" 

 •■bi-anches and the branchlets aon-calcareous. The spicules" 

 •'of the stem. partly, multi-radiate, short fusees; partly. 

 -plain bistellates invisible tu the naked eye. Septa non-" 

 "calcareous". 



Subsequent examinations have shown the necessitj 

 of making mhiic change in these characteristics. There 

 has. in fact, becn discovered during the Norwegian North- 



Atlantic Expedition, no fewer than 8 new sj ies which 



I feel compelled to relegate to the genus Duva. although 

 several of theni differ from the generic character origi- 

 nally stated, inasmuch that calcareous spicules are found, 

 both, in the stem as well as in the branches. I do 

 not consider it necessarv tu tunn a new genus fur these. 

 because, with the exception of the calcareous deposit in 

 the steins and branches. they have. in both their interim- 

 and exterior structure, sn much in common, that a sepa- 

 ration into two genera can not be niaintained. To this 



1 Bergens .Museum. Nye Alcyonider. Gorgonider og 1' 

 tulider. tilhørende Norges Fauna ved .1. Koren og D. C. Danielssen, 

 Paa-. :;. Bergen 18S3. 



