481 
Fig'. 98. Pleurococcus spec. 300: 1. 
a gathering of a great many different algae, e. g. Calothrix scopulorum, 
some very thin Oscillariacece, fragments of Ulothrix, Porphyra, etc.; 
and further, a small, unicellular, yellowish alga, which occurred 
abundantly in the gatherings and is presumably that which Ly ngby e 
calls Palmella adnata , as I think it must be this alga to which he 
refers when he writes in his diagnosis: »granulis internis globosis, 
fuscis«, and in Descript.: »granula intra substantiam lutescentem 
minuta, globosa, fusca«. 
Judging from the material in hand, the cell contents are of a 
yellowish colour, which corresponds to Lyngbye’s description. As 
far as I can see, the chromato- 
phores consist of one or more > 
parietal plates (fig. 98); some of ' 
the cells contained one or two 
fairly large pyrenoids, the cliro- 
matophores being generally arranged around the latter somewhat 
in the form of a star. The cells are almost oval, and are about 
11 —12 [i long and 5,5—7 y broad. They are divided sometimes 
by transverse and sometimes by longitudinal walls (fig. 98). 
I think this alga may quite naturally be referred to the genus 
Pleurococcus. I have preferred not to give it a name, as it appears to 
me that Hudson’s name adnata can hardly be used, for, his original 
examples not being available for reference, and his description being 
short, it is very difficult to decide which plant he was describing, and 
moreover, later authors (Nsegeli, Berkeley) have referred his plant 
to the genus Gloeocystis. Further, I have preferred to call it Pleurococcus 
sp. as it appears to me highly probable that the Protococcus ovalis 
described by Hansgirg in Foslie’s »Contribution« I, p. 159, is 
identical with the Pleurococcus in question. Hansgirg gives no 
reasons for calling his plant Protococcus, and his description and 
figures as a whole are not exhaustive enough for comparison. 
With regard to its occurrence along the coasts of the Faeroes 
Lvngbye (1. c.) writes: — »Habitat ad rupes maritimas declives Faeroenses, 
inter Thorshavn et Hoyvig in superiore refluxus limite, rarior«. 
Order PROTOCOCCACEAE. 
CHLOROCHYTRIUM Cohn. 
158. Ch. inclusum Kjellm., N. I., p. 392 (320), tab. 31, figs. 8—17; 
Rosenv., Gronl., Havalg., p. 963. 
The Fseroese examples appear to be precisely similar to Kjell- 
