27 



saaledes intet. Den oversto Del h:ir Længdcstribning soiu 

 T. variahiJis. 



Hvad Hydranthen angaar stemmer Tentaklernes Stør- 

 relse og Anordning med Diagnosen for nævnte Art, og 

 Gonoforerne har G — 7 Kadialkanaler; hvorvidt de har Ribber 

 eller ikke kan ikke afgjøres, da deres Udvikling er saa 

 lidet fremskreden. 



Blastostylernes Bygning og Størrelse synes at være 

 noget afvigende, idet de danner korte, tætte Klaser, der 

 ikke naar længer end til Enden af de distale Tentakler; 

 det er dog muligt, at dette Forhold senere, under Gono- 

 forernes videre Udvikling vil forandri'S. 



Pindested. St. 343. 



Tubularia regalis, Boeck (28). 



(Tab. I, Fig. .')). 



Trophosome. Hydrocaulus ngrenet, viser Længde- 

 stribning; ingen Krave. Hydranthen har 20 — 3U i)roxi- 

 male Tentakler, 2 — 4 cm. lange, og distale i tiere tætstil- 

 lede Rækker. 10 — ^20 ugrenede Blastostyler, 3.5 cm. lange, 

 danner en Krcds lige indenfor de proxiniale Tentakler. ' 



Gonosome. Fastsiddende medusoide Gonoforer uden 

 Eadialkanaler, Tentakler eller Ribber. 



Denne Art, som tidligere er l>eskrevet a f BoerJ,- efter 

 et Exemplar fra Spitsbergen, er under Nordh.-Exp. fundet 

 paa to Stationer og i Exemplarer, der i Størrelse endog 

 overgaar Boecks Exemplar. Ingen af dem er helt fuld- 

 stændige, da Stilken er afreven ovenfor Hydrorhiza. Boeck 

 har heller ikke givet nogen Beskrivelse af denne; jeg anser 

 det dog for sandsynligt, at den er forgrenet og at flere 

 Stilke er tvundet om hinanden nederst, da Hydrocaulus, 

 som øverst er lys og temmelig hyalin. og har en Diameter 

 af 3 — 4 mm., smalner af mod den proximale Del og sam- 

 tidig blir mørkere og mindre gjennemsigtig, hvad der ogsaa 

 er Tilfældet bos T. indivisa og andre Arter, hvis Hydro- 

 caulus er sammensat i sit nedre Forlob. Paa et Par af 

 Nordh.-Exp.'s Exemplarer har den afrevne Stilk en Høide 

 af over 20 cm., og det er ikke usandsynligt, at den naar 

 op til ca. 30 cm. Med sine prægtige Hydranther, der 

 maaler 7—9 cm. over de proxiniale Tentakler, og hvis 

 Blastostyler er næsten lige lange som disse, blir vel Tubu- 

 laria rec/alis staaende som Slægtens første Representant 

 med Hensyn paa Størrelse og vakker Bygning. 



Findested. St. 290, St. 343. 



Tubularia larynx. Ell. & Sol. 



Trophosome. Hydrocaulus rørformig, forgrenet, ud- 

 gaar fra en krybende, sterkt forgrenet Hydrorhiza, fore- 

 kommer i store Kolonier: men de enkelte Rør er adskilte 

 helt ned. Ringe tindes paa enkelte Partier af Hydrocaulus, 

 og den er under Hydranthen udvidet til et Slags .Krave. 



course of the stem. Its upper parts is longitudinally stri- 

 ped like T. variahilis. 



As regards the hydranth, the size and arrangement 

 of the tentacles agree witli the detinition of the above- 

 named species. and the gonophores have (J or 7 radial 

 canals. Whether they have ribs or not cannot be deter- 

 mined, as their developeraent is so very slight. 



The structure and size of the blastostyles appear to 

 be somewhat different, as they form short, thick dusters, 

 which reach no farther than the end of the distal tentacles; 

 it is, bowever, ]røssible that this may alter later on during 

 the further development of the gonophores. 



Looality. Station 343. 



Tubularia regalis. Boeck (28). 



(Pl. I, tig. .'.). 



Trophosome. Hydrocaulus unramificd, exhibiting 

 longitudinal striping; no collar. The hydranth bas from 

 20 to 30 proximal tentacles, 2 — 4 cm. long, and several 

 close rows of distal tentacles. From 10 to 20 unramified 

 blastostyles, 3..t cm. long, form a circle just within that 

 of the proximal tentacles. 



Gonosome. Fixed raeduosid gonophores, without 

 radial canals, tentacles or ribs. 



This species, which bas previously been described l)y 

 Boeck from a specimen from Spitsbergen, was found during 

 the N. Atlan. Exp. at two stations, the specimens being 

 even larger than that of Boeck. None of them are quite 

 perfect, as the stem has been broken off above the hydro- 

 rhiza, nor has Boeck given any description of the hydro- 

 rhiza. I think it probable, however, that it is raraified, 

 and that several stenis are twisted round one another at 

 the bottom, as the hydrocaulus, whose upper part is light 

 and rather hyaline, and is 3 or 4 mm. in diameter, tapers 

 towards its proximal part, at the same time becoming 

 darker and less transparent, as is the case in T. indivisa 

 and other species where the lower part of the hydrocaulus 

 is composite. In two or three of the N. Atlan. Exp. 

 specimens, the length of the broken stem is more than 20 

 cm., and it is not iraprobable that it attains a length of 

 about 30 cm. With its splendid hydrantlis. measuring 

 from 7 to 9 cm. beyond the proximal tentacles, T. regalis 

 will ahvays rank as the first representative of the genus 

 as regards size and beauty of form. 



Locality. Station 290, Station 343. 



Tubularia larynx. Ell. and Sol. 



Trophosome. Hydrocaulus tubular, ramified, sprin- 

 ging from a creoping, mach ramified hydrorhiza; occurring 

 in large colonies, bnt each tube separate to the very bot- 

 tom. Rings are found on sonie parts of the hydrocaulus, 

 which expands below the hydranth to a sort of collar. 



