2 68 F. BORGESEN 



Rhodophyceae. 



Fam. Bangiaceae. 



Goniotrichum Kiitz. 



G. elegans (Chauv.) Le Jolis. 



Le Jolis, Alg. mar. Cherb., p. 103. Rosenvinge, L. Kolderup, The marine 

 of Algae of Denmark, Part I. 1909, p. 75, where literature, synonyms etc. are also quoted. 



Of this species some smaller specimens are found growing epiphytic upon 

 Herposipho)iia tctiella. 



The specimens seem to agree very well with the description and figures 

 of ROSENVINGE. In a few of the filaments several rows of cells occurred quite 

 in accordance with the figures D. and E. of this author. 



Area of distribution: Europe, Mediterranean Sea, Maroc, West Indies, 

 Peru, Easter Island. 



Erythrotrichia Areschoug. 



E. carnea (Dillw.) J. Ag. 



J. Agardh, Till Algernes System atik, VI, Ulvaceae (Lunds Univ. Arsskrift, vol. 

 XIX, 1883, P- I 5)- Rosenvinge, Mar. Algae of Denmark, part 1, 1909, p. 67. — 

 Conferva carnea Dillwyn, Brit. Conf., 1809, pi. 84. Conferva ceramicola Lyngb , 

 Hydrophytol., 1819, p. 144, pi. 48 D. Bang/a ceramicola Chauvin, Recherch. sur 

 l'org. de plus. genr. d'Algues, Caen 1842, p. 29 — 30; Harvey, Phycol. Brit., pi. 317. 

 Erythrotrichia ceramicola Aresch., Phyc. Scand., 1850, p. 210; Le Jolis, Alg. mar. 

 Cherb., 1880, p 103, pi. 3, figs. 1 — 2; Berthold, G, Die Bangiaceen des Golfes 

 von Neapel, 1882, p. 25. 



Some small specimens are found epiphytic on Jania tenella and Callitliam- 

 nion paschale. The plants seem to be in good accordance with the description 

 of ROSENVINGE, 1. c. The filaments are about 24 [i thick. Their base was 

 quite like the figure of ROSENVINGE (1. c. fig. 8). The cells were mostly rather 

 short, rarely longer than wide. 



The spore-formation takes place in the well-known manner by means of 

 an oblique wall at the upper end of the cells. 



Area of distribution: Atlantic coast of Europe and North America, 

 Mediterranean Sea, Maroc, West Indies, West coast of North America etc. 



Erythrocladia Rosenv. 



E. subintegra Rosenv. 



Rosenvinge, L. Kolderup, The marine Algae of Denmark, Part I, 1909. p. 73. 



Specimens quite like RoSENVlNGE's figure of older plants and young ones 

 like those I have figured (Marine Algae of D. VV. I., vol. II, p. 7—9, fig. 3 a, b) 

 were found on Cladophora spec, mentioned above, p. 249. 



Area of distribution: Denmark, West Indies, etc. Most probably widely 



spread. 



