OEDOGONIUM 79 
United States: California. 
This species is near Oe. capilliforme (No. 387) and Oe. 
anomalum (No. 40). It is larger than either and has somewhat 
larger oogonia 1n proportion to the size of the vegetative cells 
than is the case in Oe. anomalum. The peculiar curvature 
(from which the specific name is derived) of the filaments, 
due to the opening of the antheridia, is usually characteristic 
of. the species. 
32. Oe. suboctangulare West and West. 
(Pl. XVII, fig. 160.) 
1902; ps 129) Pl. 17, figs. land 2; Hirn 1906; p. 23, Pl. I, fig. 4: 
Monoecious; oogonium 1, longitudinally rectangular in optical 
section, broadly inflated, membrane 3.4-3.8u4 thick, yellow, pore 
superior; oospore subrectangular-ellipsoid, filling oogonium except at 
the corners; antheridium 2, scattered; vegetative cell 50-54 & 175-240y; 
oogonium 53-67 X 82-92u; oospore 50-60 X 73-85y; antheridium 41-48 x 
25-27 u. 
Ceylon. 
The rectangularly appearing oogonium slightly exceeding 
the vegetative cells in diameter is a distinctive characteristic. 
33. Oe. martinicense Hirn. 
(Pl. XVII, fig. 159.) 
1900, p. 134, Pl. XVI, fig. 92; Oe. crassum (Hass.) Wittr. in Wolle 1887, p. 74, 
Pl. 76, figs. 2 and 3; Collins 1909, p. 240. 
Monoecious; oogonium 1, obovoid or subobovoid, pore superior; 
oospore obovoid or obovoid-ellipsoid, quite filling oogonium, spore wall 
smooth, often thick; antheridium 1—5, hypogynous; sperms 2, division 
vertical; vegetative cell 33-37115-240u; oogonium (63—)68-74 x 
96-125; oospore 66-72 X 81—-96y; antheridium 33-35 X 5-7u. 
United States: Iowa, Kansas; Island of Martinique. 
In appearance this species resembles Oe. landsboroughi 
(No. 48) or Oe. crassum (No. 49), both of which, however, are 
dioecious. 
34. Oc. kurzii Zeller. 
(Pl. XVII, fig. 163.) 
1873, p. 189; 1873a, p. 189;'Hirn 1900, p. 1385, Pl. XVI, fig. 93. 
Monoecious; oogonium 1, rarely in series, obovoid or subellipsoid, 
pore superior; oospore subglobose or ellipsoid, not filling oogonium, 
spore wall smooth; antheridium hypogynous or scattered, to 15-seriate; 
sperms 2, division vertical; terminal cell apically obtuse; vegetative 
cell 44-5290-250u; oogonium 70-95X111-130u; oospore 67-86 
80-93; antheridium 44-52 X 6-16y. 
United States: Pennsylvania, Arkansas, Mississippi; India. 

