498 
figs. 58—63; Conferva flacca Lyngb., Hydrophyt., p. 144; C. contorta 
Lyngb., 1. c. p. 145. 
The specimens referred to this species had from 1—3pyrenoids; 
the cells were about V* as long as they were broad. The breadth 
of the cell-filaments varied from about 20—60 [i. 
Lyngbye’s Herbarium contains several gatherings of Conferva 
flacca ; in those which I examined I found intermixed a large 
Ulothrix, which, judging from the dried material, agreed well with 
U. flacca ; and Urospora mirabilis also occurred in several of the 
gatherings. Lyngbye’s Conferva contorta (Hydrophyt., p. 145) must 
likewise be referred to the present species. His Herbarium con¬ 
tains two gatherings of the latter, one from Kvalbo (Syd.) epiphytic 
on the stem of Fucns , and one from rocks near Tliorshavn; on 
the packets he has written: — Conferva flacca var. contorta. 
This species has been found both on exposed and on sheltered 
coasts, where it grows sometimes gregariously on rocks, and some¬ 
times as an epiphyte on larger algae. It occurred with zoospores in 
May and June. 
The present species is doubtless commonly distributed along the 
coasts of the Faeroes. It had already been found by Lyngbye, who 
writes with reference to it (1. c. p. 144): — »Ad insulas Faeroenses saxis 
insidens«, and (1. c. p. 145) »Habitat ad littora Faeroensia stipitem infe- 
riorem Fuci vesiculosi viridi suo caespite parasitice obvestiens«. 
171. U. pseudoflacca Wille, Studien liber Chlorophyceen, p. 22. 
The specimens referred to the present species appear to agree 
well with Wilie’s description (1. c.). One large pyrenoid occurs 
in each cell, and the ribbon-shaped chromatophore is thickest where 
the pyrenoid is situated. The cells vary from about V 2 as long to 
about 16 ,u thick, thus agreeing with those of forma minor Wille, 
which also grow as an epiphyte. 
This species has been met with on exposed as well as on 
sheltered coasts as an epiphyte on different brown algae growing 
between tide-marks. Fruiting specimens were observed in June. 
I think it is common along the coasts of the Fseroes though , it has 
hitherto been found only on Syd.: Trangisvaag (!), Vaags Ejde (!). 
172. U. consociata Wille. Studien iiber Chlorophyceen p. 25. 
The specimens referred to this species appear to agree fairly 
well with Wi 11 e’s description. The cell-filaments were often adherent 
