34 TE © EDO GO Niwa AGE 
division of the suffultory cell basal; outer oospore wall scrobiculate; 
androsporangia scattered or epigynous, 1-3; dwarf males on oogonia 
(rarely on adjacent cells), antheridia interior, stipe slightly curved, 
shorter than antheridia; vegetative cells 17—2050-90yu; oogonia 
49-50 X37-45u; oospores 40-48X35-43u; androsporangia 11-15 
12-18u; dwarf males 10-12 X 28-33. 
United States: Massachusetts, Illinois, Alaska; Europe. 
This species is rather readily distinguished by its usually 
basal division of the suffultory cells, its interior antheridium, 
and its erect oogonia. It is distinguished from the variety 
minor by its larger size. 
9a. Var. minor Woronichin. 
1923, p. 99; (2) B. brebissoni Kuetz. f. in Borge 19238, p. 30; Tiffany 1928, p. 136. 
Smaller than the type; vegetative cells 13-17 X20-100u; oogonia 
35-38 X 31-388; oospores 33-36 X 29-364; dwarf males 8-9 X 26-27. 
minis Caveasus. 
10. B. furberae Collins. 
(Pl. I, fig. 8.) 
1918a, p. 142, Pl. 124, figs. 1-5; Tiffany 1928, p. 136, Pl. XIV, fig. 8. 
Dioecious, nannandrous, gynandrosporous; oogonia depressed globose, 
below terminal setae, patent (rarely erect); division of suffultory cell 
inframedian; outer wall of oospore scrobiculate; androsporangia 
scattered, 1-9; dwarf males on oogonia, stipe strongly curved; antheridia 
interior; vegetative cells 10-15X30-75u; oogonia 36-43X27-34p; 
oospores 34-41X25-32u; androsporangia 9-108-9u; dwarf males. 
1-8 X20—25p. 
United States: Massachusetts (Woods Hole). 
This species differs from B. elatior in its scrobiculate spore 
wall and its division of suffultory cell. It is smaller than 
B. brebissonit. 
11. B. crenulata Pringsheim. 
(Pl. I, fig. 4.) 
1858, p. 72, Pl. 6, fig. 4; B. crenulata Pringsh. var. plena Wittr. 1872, p. 19; 
Wittrock 1874, p. 45; Hirn 1900, p. 331, Pl. LIII, fig. 337; Collins 1909, p. 269; 
Heering 1914, p. 238, fig. 359; Tiffany 1928, p. 136, Pl. XIV, fig. 4. 
Dioecious, nannandrous, gynandrosporous; oogonia subdepressed- 
globose, patent, below terminal setae or androsporangia, or rarely 
vegetative cells; division of suffultory cells median or slightly below; 
spore wall scrobiculate to crenulate; androsporangia epigynous or 
scattered, 1-5; dwarf males on or near oogonia, antheridia interior, 
stipe slightly curved, shorter than antheridium; vegetative cells 16-20 X 
32-70u; oogonia 43-48 35-43u; oospores 40-46 X33-40u; antheridia 
10-15X7-10u; dwarf males 9-10 X 24—26un. 
