oblong-ellipsoid, 26-33/x in diameter, 44-58/a long. Oospores oblong 

 to subcylindric; outer spore wall longitudinally ribbed with costae; 

 25-31- ( 37 )/x in diameter, 43-56ja long. Antheridial cells 7-10 ^i in 

 diameter, 8/a long. Division of the suffultory cell superior. 



On submerged aquatics in lakes and in a roadside fosse. Mich., 

 Wis. 



Bulbochaete mirabilis fa. immersa (Wittr.) Hirn 1900, p. 352 



Vegetative cells 13-1 7/* in diameter, 16-30/a long, Oogonia 25-33/a 

 in diameter, 40-48/x long. Oospores 23-30/a in diameter, 38-46/j, long. 

 Antheridia 7-1 1/* in diameter, 6-8/x long. 



Mich. 



Bulbochaete Nordstedtii Wittrock 1875, p. 44 

 PI. 27, Fig. 3 



Nannandrous; gynandrosporous. Vegetative cells 14.8-(18)ju, in 

 diameter, (28)-30-45-(85)/x long. Oogonia depressed-globose; be- 

 low androsporangium (usually); 33-38- (43) /a in diameter, 29-36;u, 

 long. Oospores depressed-globose; outer spore wall finely scrobicu- 

 late; 32-34-(41)/a in diameter, 27-34/i, long. Male filaments on the 

 oogonia, 12/a in diameter, 23/x long. Division of the suffultory cell 

 superior. 



Attached to grass in a ditch through a Sphagnum bog. Wis. 



Bulbochaete obliqua Lundell in Hirn 1900, p. 344 

 PL 24, Fig. 7 

 Nannandrous; gynandrosporous or idioandrosporous. Vegetative 

 cells 21-27 fi in diameter, 42-108/a long. Oogonia depressed-globose; 

 patent; 55-64/i, in diameter, 43-51/a long. Oospores depressed- 

 globose; wall smooth; 53-62/^ in diameter, 40-49/a long. Male fila- 

 ments 9-lOjLi in diameter, 40-57/i, long. Division of suffultory cell 

 median, 

 Mich, 



Bulbochaete poltjandria Cleve in Wittrock 1871, p. 140 



PL 27, Figs. 4, 5 



Nannandrous; idioandrosporous. Vegetative cells elongate, 14.8— 

 20/i, in diameter, (45)-74-100/a long. Oogonia depressed-globose, 

 46.2^ in diameter, (32)-33.3-(42)/i, long. Oospores the same shape 

 as the oogonia; outer membrane pitted with scrobiculations; (37)-44|U, 

 in diameter, (30)-33-40/x, long. Dwarf male filaments on the oogonia, 

 8-9/i, in diameter, 23-26/x long. Division of suffultory cell superior, 

 sometimes nearly median. 



On Drepanocladus on bottom of a soft water lake, depth 35 feet. 

 Wis. 



[ 152 ] 



