HYDROIDA 



6l 



distinct main ring of nematocysts. On the other hand, there is round the polyp body, at its base, a 

 distinctive girdle of large stinging cells. Otherwise, the colony has no particular stinging organs. 



The gonophores are styloid. The male gonophores have two chambers with a well marked 

 accumulation of stinging cells distally, and are densely clustered on short stems perpendicularly 

 placed on the trunk. Female gonophores are unknown. 



Material: 



The Faroe Islands: Trangisvaag, on roots of Laminaria. 



The species was first described by Wright (1859) by the name of Eudendrium arbuscula from 

 the Firth of Forth. However, another E^^dendr^^lm had been previously described by d'Orbigny 



200 m. 



. 6 oo ni. 



.._...._.... i ooo m. .._.._ _..2ooom. 



Text-fig. T. The occurence of Eudendrium Wrighti and Eudendrtum annulatum A in the Northern Atlantic. 

 (The vothed coastal parties denote a scattered occurence of Eudentium Wrighti according to the litterature). 



(1839) by the name of Tubularia arbuscula from Patagonia, and even though it will be questionable 

 whether the species of d'Orbigny can be reidentified, we are no doubt right to follow Hartlaub 

 (1905) and abandon the name of arbuscula for the northern species. Here we, therefore, adopt the 

 denomination of Hartlaub, Eudendrium Wrighti. 



Eudendrium Wrighti\& an absolutely littoral species, the occurence of which seems to be restricted 

 to the zone of the Laminaria. It occurs quite frequently from Bohuslan as far as towards the Trond- 

 hjemfjord, and it is peculiar, therefore, that its female gonophores have not yet been pointed out. The 

 species is quite common at the British Isles (s. the Text-fig. T), and it has also been recorded from the 

 Mediterranean. Eudendrium Wrighti is, therefore, likely to be characterized as an Atlantic species of 

 southern character, which is able to penetrate into the northern seas as far as the Trondhjemfjord. 

 The Faroe Islands have now to be added to the localities where the species has been found. 



