OEDOGONIUM 133 
146. Oe. armigerum Hirn. 
(Pl. XLII, fig. 415.) 
1900, p. 203, Pl. XX XIII, fig. 208; (?) Oe. echinatum Wood tn Wolle 1887, p. 86, 
Pl. 85, figs. 13-16. 
Dioecious, nannandrous; oogonium 1, subglobose, pore superior; 
oospore globose, nearly filling oogonium, outer layer of spore wall 
echinate; dwarf male curved, on suffultory cell, stipe sometimes 2—4 
celled; antheridium exterior, 1—?; vegetative cell 9-11 36—100n; 
oogonium 29-33 X32-35u; oospore 26-29 x 26-29; dwarf male, lower 
cell 7-8 X 20-24, upper cell 4-6 X 21-30y; antheridium 5-6 X7-8un. 
Brazil. 
Characterized by its echinate oospore wall with the spines 
not spirally arranged. It is smaller than either Oe. echinatum 
(No. 147) or Oe. lindmanianum (No. 148). 
147. Oe. echinatum (Wood) Wittrock. 
(Pi. XLV, fig. 436.) 
Androgynia echinata Wood 1872, p. 198, Pl. 18, fig. 3; Oe. echinatum Wittr. 1878, 
p. 137; Hirn 1900, p. 204. | 
Dioecious, nannandrous; oogonium (?) 1, globose, usually depressed, 
pore superior; oospore globose, distending oogonium, outer layer of 
spore wall echinate; dwarf male suberect, near oogonium, (?) antheridium 
exterior, 1; vegetative cell 8-13X50-138y; oogonium 35-36 35-36; 
oospore (without echinations) 25-26 x 25-26u. 
United States: Pennsylvania. 
Wood’s figure of the echinate oospore is the only record 
of this species, other than the description above. 
148. Oe. lindmanianum Wittrock. 
(PL. XLV, figs. 434 and 435.) 
In Wittr., Nordst., and Lagerh. Alg. Exs. No. 1216, 1896; Hirn 1900, p. 204, 
Pl. XXXIV, fig. 209. 
Dioecious, nannandrous, idioandrosporous; oogonium 1, obovoid- 
globose or subglobose, pore superior; oospore globose or subglobose, 
quite filling oogonium; outer spore wall echinate; androsporangium to 
7-seriate; dwarf male a little curved, on suffultory cell, antheridium 
exterior, 1; vegetative cell 22-30 40-120u; oogonium 46-57 x 46-57; 
oospore (with spines) 45-56 X 45-54; androsporangium 22-28 & 17-27; 
dwarf male stipe 12-15 838—46u; antheridium 6-8 x 11-16n. 
Paraguay. 
Cf. Oe. armigerum (No. 146). 
149. Oe. cyathigerum Wittrock. 
(Pl. LI, figs. 484 and 485.) 
1870, p. 131, Pl. 1, figs. 6 and 7; Oe. cyathigerum Wittr. var. rumelica Istvanffi 
1890, p. 77; Oe. ornatum Hirn 1896, p. 3, fig. (p. 4); Hirn 1900, p. 252, Pl. XLIII, 
figs. 265 and 266; Heering 1914, p. 184, fig. 256; Tiffany 1926, p. 103, Pl. IX, figs. 
104 and 105. 
Dioecious, nannandrous, idioandrosporous; oogonium 1-3, subovoid 
or quadrangular-ellipsoid, pore superior; oospore same form as oogonium, 
