46 



HYDROIDA 



The well developed colony in hand has been wrongly determined as Podocorytic cariica. It is 

 hardly intelligible that Bedot, in his "Materianx ponr servir a Thistoire des Hydroides", shonld have 

 followed Allman (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 ojDcn 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 same species which is recorded, by the name 



200 m. toom. tooom. 2000m. 



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



of Podocoryuc carnca^ from the north of Iceland, on the operculum of a Balamis Ilanimcri (vSa^munds- 

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

 in Hydractinia carnca^ and, on the contrary, wholly agrees with Hydractinia Sarsii (Tab. I I'^ig. 12). 

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

 been found (Text-fig. M). 



Hydractinia ecininata (Fleming) van Beneden. 

 1828 Alcyoniiiiii rchiiiafitiii^ Fleming, A History of British Animals, jx 517. 

 1841 Hydractinir^ van Beneden, Recherches sur la structure de I'oeuf dans un nouvean 



Polype (genre Hydractinie), p. 89. 

 1909 Hydractinia n/o/iocarpa pars, Broch, Die Hydroiden der arktischen Meere, p. 199. 



. senre de 



