KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 20. N:0 5. 295 



Geogr. Distrib. Known only from the Norwegian Polar Sea. 



Localiiy: Nordlanden. I have coUected it myself at Bodö. Possibly Kleen's 

 speciraens are derived from the same place. 



Monostroma undulatum Wittr. 

 Monostr. p. 46. 

 Descr. et Fig. Monostroma undulatum Wittr. 1. c. et t. 3, lig. 9. 

 Syn. Monostroma undulatum Kleen, Nordl. Alg. p. 41. 

 Ulva lactuca Sommerf. Suppl. p. 185; see. s^jh. 

 » » Wg. Fl. Lapp. p. 507; sec. spec. 



Habitat. Found on the upper part of the sublitoral zone, attached to Corallina 

 offi,cinalis. 



Geogr. Distrib. Known only from the Norwegian Polar Sea. 



Localiiy: Nordlanden at Kjerring Isle according to specimens in Wahlenberg's 

 herbarium. 



Monostroma lubricum K.tellm. 

 Spetsb. Thall. 2, p. 48. 

 Beser, et Fig. Monostroma lubricum K.jellm. 1. c. et t. 4, fig. 8 — 9. 

 Syn. Monostroma lubricum GoBi, Algenfl. Weiss. Meer. p. 79. 



The habitat of this species is unknoAvn. Cp. K.jellm. 1. c. 



Geogr. Distrib. It belongs to the arctic region of the Polar Sea, where it is 

 found at several places. Its most northern point is Fairhaven on the north-west coast 

 of Spitzbergen Lat. N. 79° 49'. 



Localities: The Greenland Sea: Fairhaven. 



The Murman Sen: Sviatoi Noss on the coast of Russian Lapland. 



Baffin Bay: the west coast of Greenland at Kakortok Bay according to speciraens 

 in the herbarium of Copenhagen Museum. 



Monostroma cylindraceura nob. 



M. tliallo initio saceulum suboylindraccum, tenuom, flaccidura, flavescentem, bullosum, usque 10 cm. 

 longum diametro 3 — 4 cm. formante, demum libero, rima longiore vel breviore exorta plus minus expanso, vix 

 laciniato; parte monostromatica vegetativa 40 — 45 ^i. crassa; corpore clilorophylloso lumen cellulare in sectione 

 tlialli transversa qvadratum vel rectangulare, 10 — 15 u. altum nen vel fere explente; parte /.oosporifera e cellulis 

 lumine cellulari in sectione transversa tlialli elliptico vel circulari construota. Tab. 30. 



Descripion. The present alga is attached by a callus radicalis. The frond has 

 at first the shape of an almost cylindrical säck, uneven and bullate on the surface, 

 attaining a length of 10 cm. by 3 — 4 cm. in diameter, very påle green or yellowish 

 green in colour, feebly or not at all shining, of loose consistenc}', and so slimy that it 

 adheres strongly to the paper in drying. At last a reft is formed at the top, stretching 

 more or less far downwards, sometimes nearly to the base, the frond expanding at the 



