— 168 - 



Phyllitis fascia (0. F. Müll.) Külz., Rosen?. Grl. Havalg. p. 862. 



This species occurs in rock-pools, often gregariously, particularly in 

 the lower part of the litoral region, more rarely in the upper part. Spe- 

 cimens with plurilocular sporangia have heen gathered in May — September. 

 The frond is 2 — 10 cm. high and 2,5 mm. — (more than) 1 cm. broad. 

 Sometimes the frond is undulate. I have never met with cavities in the 

 frond of this species 1 ). 



E. I c el. Hölmanes (CO.); Borgarnes. 



N. Icel. Grjötnes (CO.); Hrisey. 



NW. Icel. Kolbeinså, Broddanes; Latravik in Aöalvi'k (CO.). 

 SW. Icel. Ölafsvi'k, Reykjavik. 

 S. Icel. Vestmannaeyjar. 



Fam. Dictyosiphonaceæ. 



Coilodesme bulligera Strömf. Algveg. p. 48, Tab. II, fig. 9 — 12; Rosenv. 

 Grl. Havalg. p. 862, Deux. Mem. p. 61, fig. 13. 



In rock-pools in the litoral region, and at low- water mark. The spe- 

 cimens occurring in pools in the upper litoral region are usually inflated. 

 Most frequently the specimens are undivided and agree very well with 

 Strömfelt's figure (1. c), but I have also met with forked specimens agreeing 

 with Rosenvinge's figure (Deux. Mém. 1. c). The frond is up to 30 cm. 

 long and 1 — 3 cm. broad. Specimens gathered in May — August had uni- 

 locular sporangia. 



E. Icel. rather common. Berufjöröur, Reyöarfjöröur, Seyöisfjöröur. 



NW. Icel. Isafjöröur. 



SW. Icel. Stykkishölmur. 



Dictyosiphon Ekinani Aresch. Obs. phyc. 3, p. 33. 



It has only been found in one place, growing on Scytosiphon lomen- 

 tarius in the litoral region. The frond attains a length of up to 6 cm. and 

 a breadth of 1,5 mm. With unilocular sporangia in June. 



SW. Icel. Stykkishölmur. 



Dictyosiplion flesogloia Aresch. Obs. phyc. 3; Reinke Algenflora der 

 westl. Ostsee p. 64. 



I have met with this species in rock-pools in the litoral region. The 

 frond is c. 20 cm. long and 3 mm. broad. With unilocular sporangia in 

 June and September. 



N. Icel. Arnarnes. 



NW. Icel. Skalholtsvik. 



J j H. Simmons (Algologiska Notiser. Bot. Not. 1898) mentions specimens of 

 Phyllitis fascia 2 mm. broad and 10—25 cm. long, partly hollow. 



