fond 
May 1911.] BOTANICAL SOCIETY OF EDINBURGH 177 
the brown chromatophore distinguishes it at once from all 
other known freshwater Algee, he established the new genus 
Pheothamnion. He suggests, however, to create a sub- 
family, Pheeothamniez of the Cheetophoraceze (Harv.) Wittr.. 
the latter being a family of the Chlorophycez or Green 
Alge. 
The description of this Alga given by Lagerheim (2) is as 
follows :— 
“Thallus confervoideus (non mucosus) monopodialiter 
ramosus, ramis superioribus suberectis, ramis inferioribus 
patentibus, algis majoribus adnatus. Cellule vegetativee 
cylindric vel subclavatee vel ovoidex; cellulze terminales 
obtuse vel acutatee, nunquam piliferee; cellula basalis 
subhemispheerica, basi in disculum dilatata; membrana 
cellularum tenuis et hyalina, septis incrassatis ; chromato- 
phorz laminzeformes, parietales, fusco-virides vel olivaceze 
(colore orto e chlorophyllo cum phycoxanthino mixto). 
Zoosporangia intercalaria e cellulis vegetativis orta, eadem 
forma ac cellule vegetative. Zoospor bine, bipartitione 
contenti zoosporangii ort, olivaceo-virides, puncto rubro 
nullo, ciliis vibratoriis binis in fine anteriore zoosporee positis 
preeditze, per ostiolum poriforme zoosporangii examinantes, 
sine conjugatione germinantes. Cellulee vegetativee ‘mem- 
brana in mucum gelatinosum mutata) bipartitione suecedanea 
in statum palmellaceum transeuntes.” 
The dimensions given by Lagerheim are as follows :— 
Long. cell. veg. 6-10u ; lat. cell. veg. 4-8. 
M4 » apie. 6-12y 54.) ,»- apic. 4G. 
i wea Orie. 4 tale | Wage. Ou 
, zoosporang. 6-10u ;_,, zoosporang. 5-8u. 
Diam. orif. zoosporang. 34; diam. zoosporang. 4-5. 
» cell palmell. Au. 
Total height of plant up to 100u. 
Twenty-one figures on one plate were also published in 
Lagerheim’s paper (2). 
The plant was distributed in Wittrock and Nordstedt’s 
“ Alow aque dulcis exsiccatee,” fase. 13, No. 608. 
Two years later this Algz was described by A. Hansgirg 
in the first volume of his “ Algaflora of Bohemia” (3), and he 
placed the family Pheeothamniez under the order Syngene- 
