On the Marine Algæ from North-East Greenland. 97 



Of the 60 enumerated species not less than 9 (15 p. ct.) have 

 only been found on the East coast (besides the five species new to 

 Greenland, further Chantransia efflorescens, Petrocelis polygyria, La- 

 minaria saccharina var. grandis and Arthrochœte penetrans). This 

 rather high number seems to suggest a considerable difference be- 

 tween this area and that of the West coast. Some of these species 

 are however very small and will probably be found also on the 

 West coast on further investigation, like e. gr. Pseudendoclonium sub- 

 marinum, but others are so large and conspicuous that they can 

 scarcely be supposed to have been overlooked, as Punctaria glacialis 

 and Laminaria saccharina var. grandis. It must however be remem- 

 bered that only the southern part of the West coast can be said to 

 be rather well investigated with regard to the marine algæ, while 

 the part North of 73° Lat. N., with which a comparison would be 

 particularly desirable, is very imperfectly known in that respect. 



A comparison of the flora communicated below with a list of 

 the species found in Scoresby sound, ca. 70° 27' Lat. N. (comp. К. 

 Rosenvinge 1898 I) shows nearly the same number of species. As 

 the last-named locality, in particular Hekla Havn and surroundings, 

 must be considered as comparatively well investigated through N. 

 Hartz's careful collections, we may be permitted to conclude that 

 the material brought home by Mr. Lundager also gives a rather ex- 

 haustive idea of the algal flora of that small part of the Arctic Sea 

 where it was gathered. The comparison of the two floræ shows 

 further that a great number of species are common, as was to be 

 expected. Some of the not-common species are so inconspicuous 

 that their absence from one of the areas ought not to be taken into 

 consideration; in other cases their absence cannot be regarded as 

 accidental. As species occurring in Scoresby Sound but wanting in 

 the area here in question might be named: Dilsea intégra (also found 

 at Sabine Island, 74^^ 32' Lat. N.), Pessonellia Rosenuingii, Scaphospora 

 arctica (= Haplospora globosa'?) Chordaria flagelliformis, Dictyosiphon 

 foeniculaceus, Punctaria plantaginea, Chcetomorpha tortuosa. Further 

 may be named Agarum Turneri, the presence of which in Scoresby 

 Sound, however, has not been proved with certainty, and Ptilota 

 pectinata, which has been found at Cape Wynn (74° 32' Nat. N.), 

 though not in Scoresby Sound. Of the species only found North of 

 76° Lat. N. must especially be named the new species Punctaria 



nion varians mnst be omitted (see above, tlie number must be diminished 

 with 1, but as Chantransia microscopica var. collopoda must be regarded as a 

 distinct species (comp. К. Hosknvingk 1909 p. 81) the number remains the same. 

 Thus, after the new additions to the flora, the total number for Greenland is 

 181, for West Greenland 165. 



