NEW BRITISH FRESH WATER ALG M. 
115 
Oospores depressedly globose, small males unicellular, inversely 
egg-shaped, small, seated on the oogonia, basal cell dilated and 
scutiform below. 
Size. Veg. cell 4| p diam., 3 times as long; oogonia 16-18 p 
X 18-23 /x ; oospore 16 x 11 /x. 
In lakes, ditches, etc. Upper Lake of Killarney. 
GEdogonium suecicum. Wittr. Mon. (Edog. p. 30. West 109, t. 18, 
/ 2; 
Oogonia single, globose to elliptical -globose, opening with a 
median pore ; oospores filling the oogonia, globose, spiny with 
awl-shaped spines ; male plants about the same thickness as the 
female ; spermogonia of 2-4 cells, seated in the upper part of the 
thread, terminal cell obtuse. 
Size. Veg. cell 9-14 /x thick, 4 to 6 times as long ; oogonia 
32-38x36-40 p ; oospores (with spines) 31-37 /x diam. 
Ballynahinch. 
GEdogonium pilosporum. West Linn. Journ. 1892, p. 109, t. 18,/. 3. 
Dioecious ? Oogonia single, oblong-ellipsoid, inflated, a little 
produced at each pole ; oospores subglobose, membrane thick, and 
densely pilose with short hairs ; basal cell similar to the others. 
Size. Veg. cell 11-12 /x, 5-6 times as long ; oogonia 23 x 48 /x ; 
oospore, without spines, 17 x 18 /x, with spines, 19x21 /x, mem- 
brane of oospore 2 p. 
Arderry Lough. 
The oospores showed indications of an apical operculum, but an 
open one was not seen. 
Conferva stagnorum. Kutz. Wille. Conf. 20, t. l,f. 12-27, t. 2,/. 5U. 
West p. 111. Microspora (?) stagnorum. Toni. Syll. Alg. 229. 
Tufts yellow-green, becoming paler ; cells 5-9 p diam., 1-2 or 
rarely 3-4 times as long ; membrane thick in proportion, hyaline; 
cysts elliptical or subglobose, nearly entirely filling the mother- 
cell. 
Size. Filaments 8^-10 p diam. 
Near Westport; Ballynahinch ; Upper Lake of Killarney. 
Conferva pachyderma. Wille. Conf. 20, t. l,f. 28-35. West p. 111. 
Microspora pachyderma. Toni. Alg. p. 228. 
Vegetative cells 9-12 p diam., 1| to 3 times as long as broad, 
with a thick membrane ; persistent cells formed without any 
peculiar modification from the vegetative cells, ellipsoid or sub» 
globose or quadrangular. 
Derry cl are Lough ; South of Kenmare. 
Conferva abbreviata. Wille. Con.p. 21, t. 2,f. 58,59. West p. 111. 
Microspora abbreviata. Toni Syll. Alg. 228. 
Tufts floccose, floating, bright green, or for the most part 
coloured ferruginous ochre; vegetative cells shortly cylindrical, 
scarcely constricted, 5-10 p diam., 1J to 3 times as long, membrane 
homogeneous, hyaline, a little thickened. 
Cloonee Lough. 
