HYDROinA 



59 



2 00 m. 600/71. looom. looom. 



Text-fig. S. The habitat of EHdendriuin ramcum \\\ the Nortliern Atlantic. 



perfect cosmopolite. It occurs frequently everywhere in tlie iiiiddle and deeper parts of the litoral region 

 of the northern seas (Text-fig. S), and may, exceptionally, as in the "Ingolf st. 2i, also penetrate far 

 down into the abyssal region. 



1 o 



Eudendrium ramosum (Linnc) Ehrenberg. 

 1758 Tiibiilaria raiiiosa^ Linne, Systema naturte, ed. X, p. 804. 



1834 Fjidoidriuiu raiiiosiiii/, Ehrenberg, Beitrage zur physiologischen Kenntnisse der Corallenthiere, 



p. 296. 

 nee 1887 — — , Bergh, Karaliavets Goplepolyper, p. 332. 



nee 191 1 — — , Ssemundsson, Bidrag til Kiindskaben cm de islandske Hydroider, p. 74. 



The strongly branched colonies show an almost quite regular, alternating arrangement of 

 the small branches. The main stem is fascicled. The small branches are annulated above their rise 

 from the mother branch, but are elsewhere quite smooth. The polyps have about 20 tentacles. The 

 stinging cells are not accumulated in any particular main ring round the tentacles or the polyp bod)'. 

 The colony has no particular stinging organs. 



The gonophores are styloid. The male gonophores have 2—3 chambers and are seated round 

 entirely atrophied polyps with short h)drocauli. The female gonophores are pear-shaped and borne 

 on the bodies or on the stems of polyps which are either fully developed or somewhat reduced as 

 compared to the sterile polyps. The spadix is unbranched. 



Material : 



Southeastern Iceland : (Horring) 1898. — Depth 52 — 49 fath. 



8» 



