XXIII 



SUPPLEMENT. 



As the distribution of the Chlorophyceæ and Cyanophyceæ is 

 at present insufficiently iinown, and these groups of Algæ are very 

 variously dealt witli, \ve have been of opinion that no satisfactory 

 result would be obtained by including in our list all the species, 

 which have been reported from the area mentioned above (see above 

 p. II). Hence we only give those species which are known from Green- 

 land, Iceland and the Færoes, that is, species from a somewhat 

 limited area, the Algæ-flora of which has been described under the 

 same system of classification. The occurrence of these species within 

 the larger area, however, is also stated in the following list. 



We mention these groups of Algæ here, because when the 

 species are classified on the same system, a comparison may be 

 made between different floræ-districts just as well as for any other 

 group of Algæ. We give these groups in a supplement, however, 

 as we only re fer to species from a part of the whole area we chose 

 for our purpose. 



Regarding the names of authors of species we refer to the Algæ- 

 floræ of Greenland, Iceland and the Færoes (8, 31, 32, 45 — 47 in 

 our Bibliography). 



Chlorophyceæ. 



Protococcaceæ. 

 B2 Chlorochytrium Cohnii .... 



B2 Ch. dermatocolax 



Hl Ch. inclusiiin 



Bl Ch. Schmitzii 



D Codiolum Petrocelidis 



B2 C. gregariiim ^^ 



D C. pusillum 



Uloaceæ. 



B2 Percursaria perciirsa 



D Eiiteromorpha aureola 



El E. Linza 



G E. intestinalis^° 



C E. clathrata 



A Monostroma groenlandicum 



B2 M. Grevillei 



Bl M. iindulatiim 



A M. leptodermum 



Bl M. fuscum 



C Ulva Lactuca 



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