MARIXE ALGAL VEGETATION 77 



Corallina officinalis. Dictyosiphon Ekmani. 



Petroderma maculiforme. D. Mesogloia. 



Myrionema Laminariae (in E.Greenl.) Desmarestia ligulata. 



M. vulgare. Leathesia diffbrmis. 



M. Corunnse. Laminaria saccharina (in E. Greenl.) 



M. fasroense. L. faeroensis. 



Ascocyclus islandicus. L. hyperborea. 



Ectocarpus tomentosus. Alaria esculenta in E. Greenl.) 



E. fasciculatus. Fucus spiralis. 



E. Hinksise. F. serratus. 



Sphacelaria olivacea. Pelvetia canaliculata. 



Of the 57 species here mentioned three are found in East Green- 

 land; viz. Myrionema Laminarice, Laminaria saccharina and Alaria 

 esculenta. It is most probable that none of these 57 species will be 

 met with in West Greenland, with the exception, perhaps, of some 

 of the M[//'zo/?ema-species. 



There are 74 species absent from East Greenland which are found 

 in Iceland. Of these, 54 species have already been mentioned (see 

 above), and to these must be added 20 species which are absent 

 from East Greenland but present in West Greenland and Iceland. 

 These species are the following: 



Bangia fuscopurpurea. Ectocarpus Stilophorae. 



Porphyra umbilicalis. E. tomentosoides. 



Chantransia secundata. E. penicillatus. 



C. virgatula. Sphacelaria radicans. 



Polysiphonia urceolata. Litosiphon filiformis. 



Antithamnion floccosum. Phyllitis zosterifolia. 



Ceramium rubrum. Dictyosiphon Chordaria. 



Ralfsia ovata. D. con^mbosus. 



R. verrucosa. D. hippuroides. 



Microsyphar Polysiphoniae. Castagnea virescens. 



It seems most probable that these 20 species are to be met 

 with in East Greenland. 



The 11 species present in E. Iceland and absent from West 

 Greenland are included in the above-mentioned figure. They are: 



Gigartina mamillosa. Laminaria saccharina (in E. Greenl.) 



Delesseria sangvinea. L. fseroensis. 



Odonthalia dentata. L. hyperborea. 



Dumontia filiformis. Alaria esculenta (in E. Greenl.) 



Lithothamnion flavescens. Fucus spiralis. 



L. Ungeri. 



The 23 species present in E. Iceland and absent from East Green- 

 land have also been alreadv recorded. With the addition of the 9 



/ 



of the above-mentioned species they are the following: 



