4 6 



HYDROIDA 



The well developed colony in hand has been wrongly determined as Podocoryne carnea. It is 

 hardly intelligible that Bedot, in his "Materiaux pour servir a 1'histoire des Hydroides", should have 

 followed A 11 man (1872) and referred this species to Stylactis ; it is one of the few species of Hy- 

 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 carnea 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 same species which is recorded, by the name 



60 



40 



20o m. _ .. boom. .._ _. looom. 2ooom. 



Text-fig. M. Finds of Hydractinia Sarsi end Hydractinia carica A in the Northern Atlantic. 



of Podocoryne carnea, from the north of Iceland, on the operculum of a Balanus Hammeri (Saernunds- 

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

 in Hydractinia carnea, and, on the contrary, wholly agrees with Hydractinia Sarsii (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 Alcyonium echinatum, Fleming, A History of British Animals, p. 517. 

 1841 Hydractinie, van Beneden, Recherches sur la structure de 1'oeuf dans im nouveau . . . genre de 



Polype (genre Hydractinie), p. 89. 

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



