HYDROIDA 



6i 



distinct main ring of uematocysts. 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 LajiiiiKiria. 



The species was first described by Wright (1859) by the name of Endcndriii>ii arbiiscida from 

 the Firth of Forth. However, another Eiidnidn'uiii had been previously described by d'Orbigny 



200 rn. __••--- 6 00 nj. ■..«._..._. 1000 m, 2000m. 



Text- fig. T. The occurence of Eudendriuni Jrng/it/ • and Eiideiulriuin aiiiiulatum ▲ in the Northern Atlantic. 

 (The vothed coastal parties denote a scattered occurence of Emieittium JVrfg/iti according to the litterature). 



(1S39) by the name of Tiibularia arbusaila 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 Hartlanb 

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

 denomination of Hartlanb, Eitdcudriiiiii Wrigliti. 



Eudendriuni Wrig/ifi\s 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 otit. The 

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

 Mediterranean. Eudendriuni 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 Trondhj em fjord. 

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



