— 168 — 



Phyllitis fascia (0. F. MiiU.) Kulz., Rosenv. Gil. Havalg. p. 862. 



Tliis 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 i2 — 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 M- 



E. Icel. Holmanes (CO.); Borgarnes. 



N. Icel. Grjutnes (CO.): Hri'sey. 



NW. Icel. Kolbeinsa, Broddanes; Latravi'k in AOalvi'k (CO.). 



SW. Icel. Olafsvi'k, Reykjavik. 



S. Icel. Vestmannaeyjar. 



Fam. Dictyosiphonacese. 



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

 Grl. Havalg. p. SG2, 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 

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

 with Rosenvinge's figure (Deux. Mem. 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. BerufjorQur, ReyOarfjorSur, Sey5isfj6r(5ur. 

 NW. Icel. IsafjorOur. 

 SW. Icel. Stykkisholmur. 



Dictvosiphon Ekmani 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. Stykkish(31mur. 



IHctyosiphon Mesogloia Aresch. Obs. phyc. 3; Reinke xVlgenflora 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. 



^) H.Simmons (Algologiska >'otiser. Bot. Xot. 1898) mentions specimens of 

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



