70 



D. Myxophyeeæ. 



Fam. Rivulariaceæ. 



Calothrix Ag. 



112. C. scopuloruin (W. et M.) Ag., K. Rosenv. Grl. Havalg. 

 p. 966, Deux. Mém. p. 121. 



It has been collected in the littoral region in August 1891 

 by N. Hartz. It seems to have been abundant. 

 Gr. or.: Heklahavn (N. H.). 



Oscillatoria Vauch. 



113. 0. amphibia Ag., K. Rosenv. Grl. Havalg. p. 967. 



It has been collected in July on stones in the littoral 

 region. 



Gr. or.: Stenö. 



Pleurocai)sa Thur. 



114. P. ainethystea K. Rosenv. Grl. Havalg. p. 967. 

 var. Jobs. Schmidt in Jonsson Icel. Alg. p. 378. 



The specimens were abundant on the filaments of Rhodo- 

 chorton Rothii in the littoral region, and they agree entirely 

 with the description of the Icelandic plants given by Jobs. 

 Schmidt (I.e.), they were collected in July. 



Gi\ or. : Stenö. 



