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I have found this association at its finest development in the 

 Sounds between Stromo and Ostero, and especially between Tliorsvig 

 and Kvalvig. The tides are wanting here, consequently there is 

 no current, and even during a storm the water is only slightly 

 troubled in this narrow sound. Huge specimens of L. fceroensis 

 grow abundantly here in shallow water near the coast forming 

 dense » forests «. 



The stalk which is often nearly two fathoms long and thin 

 below% is fastened b}^ several liaptera to stones on the bottom. Its 

 uppermost part is thick, hollow and full of air; it often measures 

 some inclies in diameter and serves as an air-bladder. These mav 

 be seen side by side on the surface of the w^ater, the huge lamina 

 hanging down from them. Tliis agrees perfectly witli Rosenvinge's 

 description (71, p. 211) of L. longicriiris on tlie coasts of Greenland, 

 wliich species in tlie wdiole mode of its life seems to be closely 

 related to L. fceroensis. 



L. fceroensis fructifies in summer, and probably tlien readies its 

 highest development. The changing of the lamina is hardly restricted 

 to any special season. According to my observations it may be 

 supposed, that tlie lamina grows more or less evenly for the greater 

 part of the year, and gradually decays at the apex. 



As mentioned before, Laminaria fceroensis grows down to a depth 

 of about 10 fathoms; in deep water it is, however, most often some- 

 what smaller. Far out in the fjords, where there is some current 

 and more troubled water, the lamina becomes narrower, almost 

 lanceolate and the stalk less swelled. I call this form f. saccharini- 

 formis, as it is very much like L. scicchcirina , from which it may, 

 however, be easily distinguished by its hollow stalk. 



The stalks of L. fceroensis are generally without epiphytes. Ac- 

 cording to Rosenvinge (1. c. p. 212), this is also most often the case 

 with L. longicruris in Greenland. In »Sundene«, in shallow water, 

 I have however sometimes met with plants with the stalks den- 

 sely overgrown with some green and brown algae, e. g. Monostroma 

 fnscam, Ectocarpus litoralis, Ectocarpns spec, etc. The stones on 

 wdiich it grows are likewise often covered by large, dark red crusts 

 of Crnoria pellita. In deep water various red epiphytes, e. g. Poly- 

 siphonia urceolata, Lomentaria clavellosa, Ptilota phimosa, Delesseria 

 sinuosa, etc. are also found on the stalk. It very commonly oc- 

 curs also, that young specimens of Laminaria fceroensis are attached 

 to the stalks of old specimens. In deeper water the Laminaria 



