HYDROIDA 



59 



zoom. 6oofn. ...looom. 2000m. 



Text-fig. S. The habitat of Eudendrium ranieum in the Northern Atlantic. 



perfect co.smoi3olite. It occurs frequently everywhere in the middle and deeper parts of the literal region 

 of tlie northern seas (Text-fig. S), and may, exceptionally, as in the "Ingolf st. 21, also penetrate far 

 down into the abvssal region. 



Eudendrium ramosum fUnnc) Ehrenberg. 

 1758 Ttihularia raiiiosa., Linne, Systema naturae, ed. X, p. 804. 



1834 Euiinidn'iiiii raiiiosiii/i^ Ehrenberg, Beitriige zur physiologischen Kenntnisse der Corallenthiere, 



p. 296. 

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



nee 191 1 — — , Saemundsson, Bidrag til Kund.skaben om 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 brandies 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 body. 

 The colony has no particular stinging organs. 



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

 entirely atrophied polyps with short hydrocauli. 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 spadi.x is inibranched. 



Material : 



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



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