11 



a. typica K. llosenv. I. c. 



The main part of Ihe specimens belongs to tlie typical form. 

 They were gathered in a depth of 1 — 3 fathoms, and their length 

 varies from 5 — 15 cm. The material was collected as well on 

 open as on sheltered shores in June — July and consists of mere 

 sterile plants. The species seems to be common. 



ß. connibosa (J. Ag.) K. Rosenv. 1. c. 



This variety has only been found in one place, on sheltered 

 shore, in rapid current. Sterile specimens 6 cm. high. 



The main form was found in the following places : 



Gr. or.: Kap Dan, Tasiusak, Kakasuak, Kangarsik, Angmagsivik, 

 Turner Ö, Turner Sund, Sabine Ö. 



ß. corymhosa : 



G r. o r. : Turner Sund. 



22. D. siniiosa (Good, et Wood.) Lam., K. Rosenv. Grl. 

 Havalg. p. 808, Deux. INlém. p. 27. 



The main pari of the specimens belongs to f. lingulata, and 

 only a few plants may be referred to f. typica or f. quercifolia. 

 The largest plants are 30 cm. long. The species was gathered 

 in May — August in a depth of up to 30 fathoms. Specimens 

 with tetraspores were found in July. 



It is worth noticing how common f. lingulata is in this 

 collection from the eastern coast; formerly it was only known 

 from a single place in Greenland, Sabine Ö (Rosenv. 1. c), and is 

 not mentioned at all from the western coast. This form which 

 usually occurs in sheltered places, was collected in East Green- 

 land in exposed places, near Kap Borlase Warren (11 fathoms), 

 off Turner Ö (15— 20 fathomsl and near Sabine Ö (3—8 fathoms). 

 In Turner Sund it was gathered on sheltered shore, in rapid 

 current and in a depth of 3 — 5 fathoms. Possibly such places 

 may be called sheltered on account of the considerable depths, 

 and I also suppose that the presence of the ice for the greater 

 part of the year reduces the eflects of the exposed position. 



