CDOGONIACER. 1738 
Gdogonium crassum. (Hass.) Wittr. Gotl. Sotv. Alg. p. 20, t. 1. 
f. 4-6. 
Oogonia single (rarely twin), obversely egg-shaped ellipsoid, 
a little swollen, opening by a pore above the middle; oospores 
ellipsoid, not filling the oogonia. 
Sizz.—Cells -033--055 mm. 2-5 times as long; oogonia 
065-07 x 1-125 mm. ; oospore :06-:066 x ‘08-11 mm. 
Wittr. Mon. Gdog. p. 48. Kirch. Alg. Schles. p. 59. 
Vesiculifera crassa Hass. Alg. t. 51, f. 1. 
Plate LXVI. fig. 1. Cdogonium crassum, with oogoniam x 400. 
Gdogonium subsetaceum. Kutz. Spec. p. 368. 
Basal cell dilated and discoid at the base, rather lobed, 
terminal joint obtuse ; oospores broadly oval, golden red, closely 
involved in the oogonium, 
Sizz. Cells 04-052 mm. equal or twice as long ; oogonia 
"065 x :055 mm.; ocospore 06 x *05 mm. 
Kutz. Tab. iii, t. 41, f.1. Rabh. Alg. Hur, iii, 352. 
Deeside (Scotland). 
Plate LXVI. fig. 5. Cidogonium subdsetacewm, with oogonium x 400. 
Gunvus 65. BULBOCHETE. 4g. (1817.) 
Filaments articulated, branched, joints thickened upwards, at 
or about the apex bearing sete, which are straight, hyaline, 
colourless, more or less elongated, bulbous at the base, cell 
membrane usually punctate ; oogonia opening by a lateral pore 
above the middle; mature oospore red; monecious or 
dicecious. 
Reproduction sexual as in Gdogonium. In the diccious 
species nannandrous (dwarf males). 
The following arrangement of the British species is based on that of 
Prof, Wittrock :— 
BULBOCHGTE, 
Sect. 1. Oogonia globose or subglobose, patent ; oospores with the same 
form, and filling the oogonia, Dicecious. 
A. Dwarf males unicellular. 
None. 
B. Dwarf males bicellular. 
a. Basal cell of the stem of the male plants shorter than the 
spermogonia, 
B. intermedia, DBary. 
B. polyandra, Cleve. 
B. Brebissonii, Kutz. 
B, setigera, Ag. 
