144 THE QEDOGONTACEAE 
167c. Var. nove zelandiz Hirn. 
(Pl. LVI, fig. 547.) 
1900, p. 278, Pl. XLVII, fig. 304; Oe. platygynum Wittr. forma Nordst. 1888, 
p. 12, Pl. 1, figs. 14 and 15. 
Gynandrosporous; oogonium subpyriform, projections obtuse or 
truncately rounded; vegetative cells very broadly capitellate, 6-9 
20-504; oogonium 24-28 X22-26u; oospore 20-22 18-204; andro- 
sporangium 7-8 X7-11p. 
New Zealand. 
Cf. Oe. bahusiense (No. 166). 
168. Oe. longicolle Nordstedt. 
(Pl. LV, figs. 516 and 517.) 
1878, p: 20; Pl. 2, figs. 11 and 12; Hirn 1900,-p. 263; Pl. XLV, fie278: 
Dioecious, nannandrous; oogonium 1-7, pyriform, often elongated 
longitudinally, operculate, division median and narrow; oospore sub- 
depressed-globose or subglobose, inflating oogonium medianly, not 
filling it longitudinally, spore wall smooth; basal cell subhemispherical; 
dwarf male unicellular, obovoid, minute, on oogonium; vegetative cell 
4-6 X 16-45; oogonium 13-16 16-324; oospore 12-15 X 10—-16y; dwarf 
male 24u; basal cell 14 6. 
Australia; Ceylon. 
168a. Var. senegalense Nordstedt. 
(Pl. LV, figs. 518 and 519.) 
1880, p. 18, Pl. 1, fig. 23; (2) Oe. delicatulum Kuetz. in Wolle 1887, P1. 81, figs. 
12 and 13; Hirn 1900, p. 264, Pl. XLV, figs. 279 and 280. O6¢. longicolle Nordst. 
var. senegalense Nordst. f. afghanicum Schaarsch. 1884, p. 249, Pl. 5, fig. 26, and 
in Hirn 1900, p. 264, Pl. XLV, fig. 281. 
Larger; vegetative cell 5-8X1240u; oogonium 16-20X 14-24; 
oospore 14-20 11-17; basal cell 13-14 X 5-7. 
Africa; Brazil; Ceylon; Australia; Afghanistan; Burma. 
The species is characterized by its small size, subhemi- 
spherical basal cell, nannandrous habit, and smooth oogonium. 
It is the smallest of similar species that follow: Oe. rothii 
(No. 169) and Oe. decipiens (No. 171). 
169. Oc. rothii (Le Clerc) Pringsheim. 
(Pl. LV, fig. 526.) 
(?) Prolifera rothii Le Clerc 1817, p. 476, Pl. 23, fig. 8; Oe. rothi Pringsh. 1858, 
p. 69, Pl. 5, fig. 4; Oe. cryptoporum Wittr. var. vulgare Wittr. f. abbreviata Gutw. 
1897, p. 126; Oe. cryploporum Wittr. var. subdepressum Wittr. in Wittr. and Nordst. 
Alg. Exs. No. 152, 1878; Hirn 1900, p. 265, Pl. XLV, fig. 282; Collins, 1909, p. 262; 
P. B. A. No. 520. 
Dioecious, nannandrous, gynandrosporous; oogonium 1-3, sub- 
depressed-globose, operculate, division median, narrow; oospore de- 
pressed-globose, almost filling oogonium, spore wall.smooth; andro- 
sporangium 1-4; subhypogynous, hypogynous, subepigynous, or scat- 
tered; vegetative cell 6-10 X 20-76u; oogonium 20-27 X 16—-27u; oospore 
17-25 X 14-20u; androsporangium 6-8 X5-10u; dwarf male 4X 11-12uy. 
