767 



hijperhorea is oflcii round in the association. The lamina of L. 

 hijperhorea in this sheltered place is often only slightly divided, 

 sometimes even perfectly Nvhole as with f. ciiciillata of L. digitata, 

 which species may also be found belonging to the association 

 especially in shallower water. 



The Laminaria /"oeroe/?sz's- association has also been found at 

 the bottom of Trangisvaag and Vaagfjord on Sydero, and in Kal- 

 bakfjord and Kollefjord on Stromo, and in Skaalefjord on Ostero, 

 that is, in the most sheltered localities, but nowhere so luxuriantly 

 developed as in the »Sundene«. 



This vegetation is liowever quite wanting in places wliere there 

 is a current or surf from the sea. Here w^e find a Laminaria 

 /zz/joer&orea- association which essentially resembles tliat of exposed 

 coasts. The rapid current makes up for tlie troubled sea and con- 

 stantly carries clean water to the algae. In these conditions we 

 therefore find an epiphytical vegetation on the stalk of L. hijper- 

 horea, as luxuriant and w^ell developed as on exposed coasts. La- 

 minaria digitata is often found intermingled in the upper part of 

 the association, and both here and lower down Laminaria saccharina 

 and Alaria escnlenta may be found. 



Simmons mentions a Laminaria longicruris-formsiiion (78, p. 256) 

 which he calls this association, following my former determination 

 of Laminaria fceroensis. 



The Desmarestia- Association . 



Here and there, w^here the bottom is stony, at a depth of about 

 10 fathoms, we find an association which mainly consists of Des- 

 marestia aculeata with Desmarestia viridis intermingled. To judge 

 from the dredgings, this association was w^ell developed at the 

 entrance of the gulf at Klaksvig, where it has also been observed 

 by Simmons. Phyllophora Brodicei, Polijides rotundas, Porphyra 

 miniata, Antithamnion Plumala, and some few Laminaria saccharina 

 and L. hyperborea were also found here on stones. Simmons men- 

 tions Ph. rubens and P/?. membranifolia in this locality, but my obser- 

 vations (8, p. 358) indicate that this must certainly be a mistake. 

 In the »Sundene« I have met with a similar Desniares/za-association ; 

 and Porphyra coccinea was found growing on Desmarestia acaleata 

 which may be perfectly hidden by this beautiful, little rosy alga. 



On the coasts of the Fseroes this Des/nares^za-association is at- 

 tached to the bottom, even in sheltered places. Some loose speci- 



