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Contribution. I. 



97 





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Syn. Cliorda lomeutaria Arescb. Pliyc. Scand. p. 365. 

 Fucus lomcntarius Sommcrf. Suppl. p. 184 J) 



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The form flstiilosa se.ems to me to be a pretty well mar- 

 ked one. It is smaller tlian the typical form,, and disting- 

 nishes itself, besides not being constricted, by the form of the 

 paraphyses. These are most often rather mimerous and ge- 

 nerally clavate or subclavate, with a much attenuated base. 

 The hairs are few or often wanting. 



The species in question is litoral, chiefly occurring a.t 

 low-water mark, and here it often grows gregarious in a 

 greatnumber of individuals. It thrives best on open coasts, is 

 here vigoronsly developed, attaining a length of 1 m. and more, 

 but occurs also in sheltered places. The form fishtlosa lives in 

 the same localities as f. typica, thongh occosionally in rock- 

 pools and higher np than the latter. Specimens bearing ga- 

 metangia have been coUected in the later half of June, in 

 July and in the beginning of August. 



Distrih idiom Common along the whole coast and at se- 

 veral places abundant, as KjoUefjord, Mehavn, Finkongkjei- 

 lena Syltefjord. 



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Gen. Physematoplea Kjellm. mscr. 

 Physematoplea atten uata Kjellm. 



N. Tyll. Algfl. p. 321. 

 Descr, Scytosiplion attenuatns Kjellm. L c. 

 Fig, „ „ ,; » t- 2^. %• 1-5. 



This alga is litoral, growing in rock-pools on exposed 

 places. It is here smaller and thinner than at the coasts of 

 Spitsbergen, 3—7 cm. long. It bears zoosporangia in the 



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middle of July. At West Finmarken it has been tåken with 



'. It has been sliowii tliat Chordaria attenuata Fosl. in Tromso Mus. 

 Aarsli. X, p. 176 is a Scytosiphon, but I do not know, yet, wliether 



refcrrible to ;S'. lomenUirius* 



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