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



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



Locality: Nordlanden. I have collected it myself at BodO. Possibly Kleen's 

 specimens are derived from the same place. 



Monostroma undulatum Wittr. 

 Monoatr. p. 46. 



Descr. et Fig. Monostroma undulatum Wittk. 1. c. et t. .3, fig. 9. 

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

 Ulva lacluca Sommerp. Suppl. p. 185; see. syn. 

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



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

 officinalis. 



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



Locality. Nordlanden at Kjerring Isle according to specimens in Wahlenberg's 

 herbarium. 



Monostroma lubricum K.tellm. 

 Spetsb. Thall. 2, p. 48. 

 Descr. et Fig. Monostroma lubricum Kjkllm. 1. c. et t. 4, fig. 8 — 9. 

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



The habitat of this species is unknown. Cp. Kjellm. 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 Sea: Sviatoi Noss on the coast of Russian Lapland. 



Baffin Bay: the Avest coast of Greenland at Kakortok Bay according to specimens 

 ih the herbarium of Copenhagen Museum. 



Monostroma cylindraceum nob. 



M. thallo initio sacculum subcylindraceum, tenuem, flaccidum, flavescentem, bullosum, usque 10 era. 

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

 laciniato; parte monostromatica vegetativa 40 — -45 /.i. crassa; corpore cliloropliylloso lumen cellulare in sectione 

 thalli transversa qvadratum vel rectangulare, 10 — 15 (^i. altum non vel fere explente; parte zoosporifera e cellulis 

 lumine cellular! in sectione transversa thalli elliptico vel circular! constructa. Tab. 30. 



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

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

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

 green in colour, feebly or not at all shining, of loose consistency, 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 



