174 NEMATOPHYCES. 
b. Basal cell of the stem of the male plants longer than the 
spermogonia, 
B. gigantea, Pring. 
Sect. 2. Oogonia ellipsoid or subellipsoid; oospores of the same form, 
filling the oogonia, epispore longitudinally costate, costes more or less 
crenulate. 
Sub-Sect. 1. Species moncecions. 
B. mirabilis, Wittr. 
Sub-Sect. 2. Species dicecious. 
A. Dissepiment of supporting cell obsolete. 
B. pygmeea, Pring. 
B. Dissepiment of supporting cell present. 
By insignis, Prings. 
B. rectangularis, Wittr. 
Species of which the organs of fructification are imperfectly known. 
B. gracilis, Prings. 
Szction 1. Oogonia globose, or subglobose ; dicecious. 
B. Dwarf males bicellular. 
Bulbochete intermedia. DeBary Edog. 72, t. 4, f. 1-7. 
Oogonia somewhat depressedly globose, seated beneath the 
androsporangia, dissepiment of the supporting cell in the 
middle ; epispore delicately crenulate (rarely seen) ; andro- 
sporangia 1-2 celled, epigynous, rarely scattered, dwarf males 
seated on the oogonia, stem slightly curved. 
Size. Cells ‘017-019 mm. 14-3 times as long ; androspore 
cells 013 X-01 mm.; oogonia ‘04-'048 X °031--04 mm. ; dwarf 
males :009-°01 X -024--026 mm. 
Wittr. Mon. Cidog. p. 44, t. 1, f. 18. Kirch. Alg. Schles. 
p. 60. Rabh. Alg. Eur. iii, 358. 
Britain, Ireland. 
Plate LXVII. fig. 1. Bulbochete intermedia, with oogonia, after 
DeBary x 400. 
Bulbochete polyandra. Cleve. Wittr. Disp. p. 140. 
Idio-androsporous. Oogonia sub-depressedly globose, seated 
beneath terminal sete or vegetative cells ; dissepiment of sup- 
porting cell above, or rarely about the middle; epispore deli- 
cately crenulate or nearly even; androsporangia 4-10 celled ; 
dwarf males seated on the oogonia, stem a little curved. 
' Size. Cells :015-02 mm., 3-5 times as long; oogonia 
035-046 x :032--088 mm.; androspore cell -013-'014 x 
‘012-015 mm.; dwarf males ‘008--009 < :023 mm. 
Wittr. Mon. Gidog. p. 46, t. 1, f. 19,20. Kirch. Alg. Schles, 
p. 61. 
Britain, Ireland. 
Plate LXVIL. fig. 2. Bulbochete polyandra, with oogonia; 2a, with 
androsporangia x 400, 
