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MOUGEOTIA 105
aplanospores occupying the middle part of the cell; obliquely ovoid,
/J. 24-30 X 32-48 Ai. (PI. XVII, Fig. 21.)
United States: Florida, Daytona (Tiifany Coll.).
In Florida the 3 foregoing species were all found in the same pond. In
none of the specimens studied was interspecific conjugation observed.
63. MouGEOTiA CAiMANi Transcau 1938. Amer. Jour. Bot. 25,
p. 525, Fig. 2.
Vegetative cells 4-5 m x 60-100 /x; chromatophores with 2-8 pyre-
noids in a single row; conjugation scalariform; zygospores dividing
both gametangia, subglobose, 20-25 ft ^^ diameter, surrounded by a thin
pectic layer. Zygospores seen were smooth and colorless. They may not
have been mature, but the dimensions of the filaments and the zygospores
distinguish it clearly from all described species. (PI. XVII,
Fig. 18.)
Haiti, Trou Caiman (R. M. Bond Coll.).
After conjugation the filaments form a tangled meshwork, since they
bend in all directions during conjugation.
64. MouGEOTiA CHEROKEANA Taft 1934. Trutis. Atuer. Micros. Soc.
53, p. 222, Fig. 39.
Vegetative cells 7-9 m x 90-120 /a; chromatophores with 2-6 pyre-
noids in a single row; conjugation scalariform; zygospores filUng the
tube and dividing both gametangia, globose, rarely subglobose, 21-25 /a
in diameter, surrounded by an outer pectic layer 4-6/i in thickness;
spore wall yellow to brownish-yellow, smooth. (PI. XVII, Fig. 23.)
United States: Oklahoma, Wichita Mountains, April 29, 1932.
65. MouGEOTiA AMERICANA Transeau 1918. Tech. Pub., No. 9.
New York State College of Forestry, p. 237.
Vegetative cells /«• 4-5 x 40-120 /x; chromatophores with 4-10 pyre-
noids in a single row; conjugating cells slightly or strongly geniculate;
zygospores dividing both gametangia, irregularly quadrate with concave
or convex sides; angles produced and truncate, the space between
the zygospore and the sporangium walls being filled with pectic ma-
terial; spores 1 3-24 /i X 18-32/x; wall colorless, smooth, transparent;
aplanospores obliquely elliptical, ends truncate at the middle of very
long genuflexed vegetative cells, 10-14 /a ^ 20-26 /x. (PI. XVIII, Figs. 1-3.)
United States: Michigan; New York; Florida.
66. MouGEOTiA coRNicuLATA Hansgirg 1886. Oesterr. Bot.
Zeitschr., No. 10.
Vegetative cells 5-7 ft x 30-1 80 ft; conjugation scalariform; sporangia
dividing both gametangia; zygospores quadrately ovoid, ft 22-26 x