-.-ry,-.'<''=^ 



Contribution. I. 



23 



^*- 



Beser, Fucus smuosus y ciuercifolius Turn, 1. c. 



Exsicc, Delesseria sinuosa Arescli. Alg. Scancl. ex3icc. No. 74, 



f. Ungulata Ag. 



ri 



Spee. Alg. 1, p. 175. 

 Descr, Delesseria sinuosa y lingulata Ag. 1. c. 

 Fig, Phycodrys sinuosa Kiilz. Tab. Fhvc. 16, t. 20, flg. e—f. 



. Syn. Fucus rosens Fl. Pan. t. 652. 



n 



sinuosus Wg. Fl. Lapp. p. 491. 



I ■ 



This is properly a pelagic species, and appears along 

 the unsheltered coast almost ever in the typical form, or 

 iorms which are most nearly related to thi.s. But it also 

 enters into the bays or occnrson sheltered places, yet here 

 it does not develop to the sameluxuriancy as on open shore 

 and assiimes more or less differing forms. It is at least on 

 such places the most extreme forms are observed. Thns f. 

 Ungulata is only to be met with in more or less sheltered 

 localities, or on a greater depth, and generally on looser 

 bottom than the other forms. Of the form qiicrcifolia I have 

 only seen a couple of specimens at East-Finmarken, or pro- 

 perly a transition between this form and f. typica, bnt most 

 likely to be reckoned to the former. 



The present species is litoral, sublitoral as well as eli- 

 toral. Within the litoral region it is not of ten met with, 

 and only in rock-pools, generally attached to Laminaria~r oois. 

 The sublitoral zone is its proper native place. On open shore 

 and rocky bottom, on a depth of 5—15 fathoms the best de- 

 veloped and most Inxuriant individuals are collected, attai- 

 ning a length of 40 cm. Large and well developed speci- 

 mens are also to be fonnd growing on the stems and root 

 of Laminaria hyperhorca. I only knowlittle of its occurrence 

 in the elitoral zone, aa I have here only two times met with 

 a few living but somewhat stunted individuals, on a depth 

 of about 25 fathoms. Yet this has been onloose andclayish 



bottom wliere the plant seldom thrivcs, and on such locali- 



