60 



H. JONSSON 



R h o d o p h 3' c e se. 



Porphyra miniata. 

 Conchocelis rosea. 

 Chantransia virgatula. 

 Phyllophora Brodisei * interrupta. 

 Actinococcus subcutaneus. 

 Euthora cristata. 



Rhodymenia palmata. 

 Delesseria sinuosa. 

 Rhodomela lycopodioides. 

 Odonthalia dentata. 

 Ptilota plumosa. 

 Lithothamnion glaciate. 



Ralfsia clavata. 

 Ectocarpus tomentosoides. 

 Leptonema fasciculatum v. 



drica. 

 Elachista fucicola. 

 Punctaria plantaginea. 

 Litosiphon filiformis. 

 Isthmoplea sphaerophora. 

 Stictyosiphon tortilis. 



P h se o p h y c e se. 



Phseostroma pustulosum. 

 Dictyosiphon hippuroides. 

 subcylin- D. foeniculaceus. 



Desmarestia viridis. 

 D. aculeata. 



Chordaria flagelliformis. 

 Chorda tomentosa. 

 C. filum. 

 Fucus inflatus. 



Chlorochytrium Cohnii. 

 C. inclusura. 

 C. dermatocolax. 

 Codiolum gregarium. 

 Percursaria percursa. 

 Monostroma Grevillei. 

 Ulothrix flacca. 



Pseudendoclonium submarinum. 

 Bolbocoleon piliferum. 

 Ulvella fucicola. 



C h 1 o r o p h y c e se. 



Pringsheimia scutata. 

 Urospora mirabilis. 

 U. Wormskioldii. 

 Chaetomorpha Melagonium. 

 Spongomorpha vernalis. 

 Acrosiphonia incurva. 

 Cladophora rupestris. 

 C. hirta. 

 C. sericea. 

 Ostreobium Queketti. 



Pleurocapsa amethystea. 



Cyanophyceae. 



C. The Boreal-Arctic Group. 



The species of this group are common in the Arctic Sea and 

 the boreal area of the Atlantic at least as far south as the Atlantic 

 coast of North Africa; probably some of them have a far greater 

 southern distribution. Some of them might possibly be considered 

 cosmopolitan. 



Bangia fuscopurpurea. 

 Porphyra umbilicalis. 

 Chantransia microscopica. 

 C. secundata. 

 Ahnfeltia plicata. 



Rhodophyceae. 



Antihamnion Plumula v. boreale. 

 Ceramium rubrum. 

 Rhodochorton Rothii. 

 R. membranaceum. 

 Hildenbrandia rosea. 



