170 THE “OE D-OGONTACE Ar 
229. Oc. plicatulum Wittrock. 
(Pl. LVI, fig. 535.) 
1874, p. 38; Hirn 1900, p. 310, Pl. XLVII, fig. 296; Oe. rothit Breb. in Rabenh. 
Alg. Eur. 2347, 1873. 
Oogonium 1-3, subpyriform-globose, medianly plicate, with 12-17 
longitudinal ridges, operculate, division supramedian; oospore sub- 
depressed- to subpyriform-globose, nearly filling oogonium, spore wall 
smooth; terminal cell apically obtuse; vegetative cell 7-11 16-65; 
oogonium 23-28 X 24-29; oospore 21-25 21-25n. 
India. 
To be compared with Oe. oelandicum (No. 164), Oe. mega- 
porum (No. 165), and Oe. crenulatum (No. 233). 
230. Oc. lagerstedtii Wittrock. 
(Pl. LVI, figs. 536-538. ) 
1874, p. 38; Hirn 1900, p. 311, Pl. XLVII, fig. 306. 
Oogonium 1-4, depressed-obovoid, medianly plicate, with 7-11 
longitudinal ridges, operculate, division inframedian; oospore depressed- 
globose or subglobose, not filling oogonium, spore wall smooth; vege- 
tative cell 5-8X10—-48u; oogonium 16-23 13-17y; oospore 13-16X 
11—14uy. 
Finland, Sweden. 
Cf. Oe. platygynum (No. 167). 
231. Oe. uleanum Hirn. 
(Pl. LV, fig. 529.) | 
1900, p. 311, Pl. XLVIII, fig. 308; Oe. sp. Moebius 1895, p. 174, Pl. 2, figs. 
11 and 12. 
Oogonium 1-2, subpyriform, medianly plicate, with 7-9 longitudinal . 
ridges, operculate, division inframedian; oospore globose or subglobose, 
not filling oogonium, spore wall smooth; vegetative cell 8-10 40-80y; 
oogonium 23-29 X 24-39; oospore 18-22 18—25uy. 
Brazil. 
Cf. Oe. platygynum (No. 167) and Oe. lagerstedtii above. 
232. Oe. pulchrum Nordstedt and Hirn. 
(Pl. LVI, fig. 541.) 
In Hirn 1900, p. 312, Pl. XLVIII, fig. 309. 
(?) Dioecious-nannandrous; oogonium 1, depressed-pyriform, med- 
ianly plicate, with 7-10 longitudinal ridges, operculate, division infra- 
median; oospore globose or subglobose, not filling oogonium, spore 
wall smooth; (?) androsporangium 1-4, subepigynous or subhypogynous 
or rarely hypogynous; vegetative cell capitellate; terminal cell (often an 
oogonium) apically obtuse, vegetative cell 6-9 X 20-52u; suffultory cell 
9-12 15-36y;. oogonitum 23-26 19-264; oospore 18-23 X 16-22); 
(?) androsporangium 7-8 X 7-8. 
Brazil. 
Cf. Oe. bahusiense (No. 166) and Oe. platygynum (No. 167). 
