On the Marine Algæ from North-East Greenland. 99 



ner as that used in 1898 (II), a much smaller 'number of North 

 Atlantic species results than in the flora of the whole of Greenland, 

 as might be expected. When all the species are included the fol- 

 lowing numbers result: arctic 35 p. ct., subarctic 466 p. ct. and 

 North Atlantic 183 p. ct., while the numbers for the whole of 

 Greenland are: arctic 30 p. ct., subarctic 37-7 p. ct. and North 

 Atlantic 323 p. ct.^ When the Rhodophyceæ and Phæophyceæ 

 are only taken in consideration, we obtain for North-East Green- 

 land: 35*6 p. ct. arctic, 53*3 p. ct. subarctic and 11*1 p. ct. North At- 

 lantic species, for the whole of Greenland: 33 p. ct. arctic, 461 p. ct. 

 subarctic and 209 p. ct. North Atlantic. The last named numbers 

 for North-East Greenland are almost identical with the corresponding 

 numbers for the whole of East Greenland found in 1898 (i. e. for 

 the East coast south of 74° 30' Lat. N. or more correctly south of 

 70° 30' Lat. N.): 36'5 p. ct. arctic, 54 p. ct. subarctic and 11 p. ct. 

 North Atlantic species, (K. Rosenvinge 1898 II p. 180). This striking 

 agreement in spite of the existing floristic differences between the 

 different parts of the East coast seems to be the expression of the 

 pronounced arctic character of the whole coast. Even if the num- 

 bers given might be somewhat altered by taking Jönsson's paper 

 (1904) into consideration, and will probably be altered by further 

 investigations, I do not doubt that the agreement mentioned really 

 exists. 



LIST OF THE SPECIES. 



A. Rhodophyceæ. 



Fam. Corallinaceœ. 

 Lithothamiiion Phil. 



1. L. tophiforme Unger. 



Foslie (1895) p. 119, (IHO.')) p. 51, K. Rosenvinge (1898 I) p. 13. 



The collection contains one specimen only which can be referred 

 to this species. It agrees with the specimens formerly found in 

 West Greenland and has bipartite sporangia (144 /^ long, ion thick). 



Localit)'. Entrance to the harl)our. 



2. L. glaciale Kjellm. 



Kjellman (188:5 1 p. 12;^: K. Rosenvinge (1893) p. 773, (1898 I) p. 9. 



f. typica Foslie (^1905) p. 26. 



^ See note page 98. 



