124 L. KüLDERUP Rosenvinge. 



Fam. Myrionemaceæ. 



Myrionema Grev. 



41. M. foecundum (Strömf.) Sauv. 



Skuvageau (1898) p. 10; Børgesen (1902) p. 426. 

 Phycocelis foeciinda Strömfeit (1888) p. 7. 



A small Myrionema which seems referable to this species was 

 met with in the upper end of a young Alaria in close company 

 with Phœostroma piistulosum. The hairs were provided with a sheath 

 at the base, and were 4 — 5/^ thick. The sporangia which showed 

 here and there a few longitudinal divisions were 7 — 9 fx broad. 



Loc. Along Cape Bismarck Peninsula. 



Sorai)ion Kuck. 



42. S. Kjellmani (Wille) К. Rosenv. 



к. Rosenvinge (1898 I) p. 95. 



Some crusts of this species agreeing with the formerly collected 

 specimens from Greenland were met with growing on Lithothamnion- 

 crusts. They were up to 4 mm. in diameter and bore empty unilo- 

 cular sporangia which were scattered over the surface of the frond. 

 Sterile specimens undoubtedly of the same species were found on 

 Turnerella Pennyi. 



Loc. Danmarks Havn; off Baadskæret. 



Lithoderma Aresch. 



43. L. fatiscens (Aresch.) emend. Kuckuck. 



Kuckuck (1894) p. 238; К. Rosenvinge (1893) p. 901, (1898 I) p. 97; Jonsson 

 (1904) p. 39. 



This species is common, forming more or less extended crusts 



on the stones, often confluent so that the stones are covered with a 



continuous brown crust which easily loosens from the stone on 



drying. The crust is often fairly thick, e. gr. 30 cells thick and 



more. Some of the specimens collected in the end of August (or 



perhaps also in the beginning of September) showed plurilocular 



sporangia, as described by Kuckuck (1. с. p. 238 fig. 11 A), partly 



young partly fairly well developed, however scarcely fully ripe. 



This agrees with what I have found in specimens from Scoresby 



Sound (1898 I p. 98). 



Loc. Danmarks Havn; entrance to the Harbour; along Vestre Hav- 

 nenæs, ca. 38 meters. 



