148 REE “OE DIO'GON LACE AS 
The twisted appearance of the filaments, the inframedian 
operculum, and the non-filled oogonia are characteristic. It 
should be remarked that Hallas’ original figure which Hirn 
copies gives every evidence of an inframedian “‘pore.’’ The 
description however indicates an operculate oogonium. The 
curved filaments are similar to those of the monoecious Oe. 
curvum (No. 2). It should be compared with Oe. platygynum 
(Nosi67): 
177. Oe. schmidlei Gutwinski. 
(Pl. LVII, fig. 572.) 
1896, p. 2, Pl. 1, fig. 2; Hirn 1900, p. 228, Pl. XX XVIII, fig. 234. 
Dioecious, nannandrous; oogonium 1, obovoid-globose, operculate, 
division superior (? narrow); oospore globose, not filling oogonium, 
spore wall pitted, rather thick; dwarf male a little curved, on suffultory 
cell, antheridium exterior, 1?; vegetative cell 10*25-90u; suffultory 
cell 22 44u; oogonium 2932-37; oospore 26 X 26u; dwarf male stipe 
5X 27u; antheridium 5-6 X5-6uy. 
Austria; British Columbia. 
Gutwinski’s figure leaves room for doubt as to the exact 
nature of the oospore wall. Hirn (1900) regards it as ‘‘mem- 
brana porifera’’ which I have interpreted as pitted. The 
record from British Columbia by Mr. G. H. Wailes gave no 
added data. In general appearance it resembles the larger and 
smooth spored Oe. hians (No. 180). 
178. Oe. longatum Kuetzing. 
(Pl. LVIILI, fig. 563.) . 
1853, p. 11, Pl. 33, fig. 6; Wittr. 1874, p. 38; Nordst. 1877, p. 28; Oe. crispulum 
Wittr. and Nordst. im Wittr. 1872, p. 5; Hirn 1900, p. 239, Pl. XL, fig. 248; Heering 
1914, p. 182, fig. 249; Tiffany 1926, p. 105, Pl. IX, fig. 106; P. B. A. No. 82. 
Dioecious, nannandrous; oogonium 1-8, ovoid to ellipsoid, opercu- — 
late, division superior; oospore ellipsoid about filling the oogonium, 
spore wall usually smooth, basal cell elongate; terminal cell obtuse; 
dwarf male on the oogonium; antheridium exterior, 1—?, curved; vege- 
tative cells 4-7 10-35u; oogonium 16-18 X 21—25yu; oospore 15-17 
17-19; dwarf male stipe 5-6 X 10-15y; antheridium 4-5 X 5-6u. 
United States: Iowa, Massachusetts, Pennsylvania; Austria, 
England, Finland, Germany, Sweden; British Columbia. 
Cf. Oe. rugulosum, below. — 
179. Oe. rugulosum Nordstedt. 
(Pl. LVIII, fig. 560.) 
1877, p. 28, Pl. 3, figs. 12 and 13; Oe. sp. Borge 1896, p. 5, Pl. 1, fig. 4; Hirn 1900, 
p. 241, Pl. XL, figs. 249 and 250; Heering 1914, p. 182, fig. 250; Transeau 1917, p. 231; 
Tiffany 1926, p. 105, Pl. IX, fig. 96. 
Dioecious, nannandrous; oogonium 1—2, obovoid or obovoid-ellipsoid, 
operculate, division superior; oospore ellipsoid, nearly filling oogonium 
