52 Pint © PpoGe on wAcE AE 
3. O. media Lewis nov. sp. mss. 
(Pl. LXI, figs. 601-603.) 
Monoecious; oogonium single, mostly terminal, globose to sub- 
globose, with conical apex (if terminal), pore median; oospore globose, 
not quite filling oogonium, spore wall with middle layer angulate or 
smooth; antheridium 1-2; terminal cell with conical apex; vegetative 
cell 12-18X56-78u, rhizoidal 10X(up to)270u; oogonium 52X52y; 
oospore 44 44u; antheridium 15 9-15y. 
United States: Massachusetts (Woods Hole). Collected by 
Professor I. F. Lewis. 
4. QO. hazenii Lewis nov. sp. mss. 
(Pl. LXII, figs. 604-612.) 
Dioecious, nannandrous, gynandrosporous; oogonium globose to 
subglobose, terminal or intercalary, pore inferior; oospore globose, 
not or nearly filling oogonium, spore wall with middle layer angulate; 
androsporangium 1-2, epigvnous, subepigynous, or scattered; dwarf 
male curved or erect, on suffultory cell-or more rarely on oogonium; 
antheridium exterior, single; vegetative cell 15-26X47-132u, rhizoidal 
4X(up to)425u; oogonium 50-75 50-75u; oospore 45-55 45-55; 
androsporangium 16X7—12u; dwarf male stipe 18-22 7-10u; anther- 
idium 6-8 X 6-7u. 
United States: New Jersey. Collected by Professor T. E. 
Hazen. 
O. hazenii is the only dioecious, nannandrous species of the 
genus as well as the enly aquatic member, so far recorded. 
Data for descriptions and plates of Oedocladium media and 
O. hazenit were supplied by Professor I. F. Lewis of the Uni- 
versity of Virginia. Lewis’ O. hazenit makes it necessary to 
emend Stahl’s original description of the genus to include this 
nannandrous species growing in an aquatic habitat. 
