46 



HYDROIDA 



The well developed coloin- in hand has been wrongly determined as Podocoryne carnca. It is 

 hardly intelligible that Bedot, in his "Materiaux pour servir a I'histoire des Hydroides", shonld have 

 followed All man (1872) and referred this species to Stylactis ; it is one of the few species of Ily- 

 dractinia which, even at the extremities of small colonies, show no indication of the open network of 

 stolons for which Stylactis should be distinguished. 



The species seems to be a boreal one, but it has hitherto been recorded only from very few 

 localities, as it has probably been mistaken for Hydractinia carnca also by investigators subsequent to 

 M. Sars (1846). It has previously been recorded only from the coast of Norway near Bergen. In the 

 Danish collections is found a well developed, though sterile, colony from Iceland (Seydisfjord), 

 seated on the claw of a strand-crab. It seems to be the saing species which is recorded, by the name 



200 m. 600m. .. ipoo m. 2000m. 



Text-fig. M. Finds of Hydractinia Sarai • end Hviiractinia carica J^ in the Northern Atlantic. 



of I'odocoryiie carnca^ from the north of Iceland, on the operculum of a Balaiius HaiiDiicri (Stemunds- 

 son 1902, 1911); here is only found the chitinous crust; but it differs considerably from the crust found 

 in Hydractinia carnca^ and, on the contrary, wholly agrees with Hydractinia S'arsii (Tab. I Fig. 12). 

 Finally also West Greenland (Godthaab) has to be added to the localities where the species has 

 been found (Text-fig. M). 



Hydractinia echinata (Fleming) van Beneden. 

 1828 Alcyoniuin cchiuatuni^ Fleming, A History of British Animals, p. 517. 

 1841 ITydractinir^ van Beneden, Recherches sur la structure de I'oeuf dans un nouveau 



Polype (genre Hydractinie), p. 89. 

 1909 Hydractinia monocarpa pars, Broch, Die Hydroiden der arktischen Meere, p. 199. 



sen re de 



