78 



H. JONSSON 



Bangia fuscopurpurea. 

 Porphyra umbilicalis. 

 Chantransia secundata. 

 Polysiphonia nrceolata. 

 Antithamnion floccosum. 

 Ralfsia verrucosa. 

 Ectocarpus Stilophora?. 



Ectocarpus tomentosoides. 

 E. penicillatus. 

 Sphacelaria radicans. 

 Litosiphon filiformis. 

 Phyllitis zosterifolia. 

 Dictyosiphon Chordaria. 

 Castagnea virescens. 



These species might possibly also be found in East Greenland, 

 as they are already known from West Greenland (see above), and 

 in that case there could be only 9 E. Iceland-species which were 

 not known from East Greenland. 



In West Greenland there are 27 species which are not found 

 in Iceland. These are: — 



Harveyella mirabilis. 



Callymenia sangvinea. 



Delesseria Montagnei. 



Polysiphonia elongata. 



Ceramium Areschoughii. 



C. septentrionale. 

 Rhododermis elegans. 



Lithothamnion intermedium. 



Chantransia collopoda. 

 Sorapion Kjellmani. 



Ectocarpus Pringsheimii. 

 E. ovatus. 

 E. pycnocarpus. 

 E. maritimus. 



Sphacelaria racemosa. 



Phaeosaccion Collinsii. 

 Symphyocarpus strangulans. 



Kjellmania subcontinua. 



Coelocladia arctica. 

 Delamarea attenuata. 



Dictyosiphon hispidus. 



Myriocladia callitricha. 

 Laminaria solidungula. 

 L. longicruris. 



L. cuneifolia. 

 L. groenlandica. 

 Agaruni Turneri. 



Of these species 13 (with prefixed) are found in East Greenland. 



In East Greenland 21 species are found which are not known 

 from Iceland. In addition to the 13 above-mentioned species, they 

 are the following: — 



Chantransia efflorescens. Ectocarpus helophorus. 



Haplospora globosa. 



Dilsea integra. 

 Petrocelis polygyna 

 Cruoriopsis hyperborea. 



Punctaria glacialis. 

 Myrionema foecundum. 



The greater number of the West Greenland and East Greenland 

 species here mentioned will probably be met with in Iceland, espe- 

 cially on the north and east coasts. It is less likely, however, that 

 the following species will be found in Iceland: — Callymenia sanguinea, 

 Delesseria Montagnei, Dilsea integra, Petrocelis polygyna, Laminaria 

 solidungula, L. cuneifolia, L. groenlandica and Agarum Turneri. 



According to the above comparisons Iceland most nearly resembles 

 Finmark, and next to that place the Faeroes; the resemblance to West 



