153 



A specimen of S. oligospomm, I received from Mr. Svedelius, growing in 



the walls of Polysiphonia, had the basal filaments for the most part imited 



in a pseudoparenchyma. The number of chromatophores and the branching 



of the basal filaments was the same as in S. StilophorjE var. csespitosa. 



The hairs had also a sheath below. The erect portion of the frond is 



much less developed, the sporangia sessile, simple and much shorter, 



than in the named variety. 



The species is only known from few places, but 1 think it will prove 



to be much more common. 



E. I eel. Holmanes. 



N. Icel. EyjafjorOur. 



NW. Icel. Skalholtsvi'k; Latravik in AOalvik (CO.). 



SW. Icel. Reykjavik. 



S. Icel. Vestmannaeyjar. 



Pylaiella littoralis (L.) Kjellm. Ectocarpus 1., 

 Kuck. Ectoc. p. 7; Rosenv. Grl. Havalg. p. 881 ; 

 Pylaiella littoralis, P. varia Kjellm. Handbok p. 83. 



var. opposita Kjellm. Besides the typical 

 form, which occur? everywhere along the coast, 

 I have in one place. KolfreyjustaOur in E. Icel., 

 met with f. rupincola Kjellm. 



var. f.rnia (J. Ag.) Kjellm. is found here 

 and there along the coasts. Besides the typical 

 form, I think I have been able to discern f. sub- 

 glomerata Kuck. and f. pachycarpa Kuck. 



var. divaticata Kjellm. has only been found 

 in some few places. I have not met with the 

 typical form, but a specimen collected by Strom- 

 felt in E. Iceland and by him determined as 

 f. compacta Kjellm., is to be referred to it. 

 F, ramellosa Kuck. I have met with in few places 

 in N. Icel., NW. Icel. and SW. Icel. usually down 

 to a depth of G fathoms on Alaria esculenta 

 and other alg*. 



var. varia (Kjellm.) Kuck. 



f. tifpica, Pylaiella varia Kjellm. Arct. Alg. p. 282. 



1 have only met with the typical form. It is both found loose and 

 growing on other algte e. g. Ascophyllum nodosum in the literal region, 

 and on Saccorhiza dermatodea and Alaria esculenta in the sublitoral region 

 down to a depth of 5 fathoms. Gathered with unilocular and plurilocular 

 sporangia in Juli — September. This var. has only been found in following 

 places : 



Fig. 13. Pylaiella littoralis 



(L.) Kjellm. var. varia 



(Kjelhii.) Kuck. f. typica 



wilii plurilocular sporangia. 

 (12G : 1.) 



