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MOUGEOTIA 95
conjugation scalariform; zygospores formed in the conjugating tube,
globose, 40-41^1 in diameter; spore wall smooth and indistinctly lam-
ellate; sporangial wall thicker at the ends of the tube. (PI. XIV, Fig. 18.)
Australia, Victoria.
23. MouGEOTiA CRASSA (Wollc) dc Toni 1889. Sylloge Algarum,
l,p.7i6.
Vegetative cells about 50 /a x 200-500 /j.; conjugation scalariform;
zygospores in the greatly enlarged conjugating tube, globose, about 65/^
in diameter; spore wall smooth.
United States: Florida.
24. MouGEOTiA cAELESTis Transeau 1934. Trans. Amer. Micros.
Soc. 53, p. 218.
Vegetative cells about 7-9 m x 50-75 /a; chromatophore with 2-6
pyrenoids, usually 4; conjugation scalariform; zygospores in the con-
jugating tube, rarely extending slightly into the gametangia, ovoid to
subglobose, 18-20^1 x 21-25/^; spore wall light yellow, punctate; repro-
duction usually by aplanospores; aplanospores globose to subglobose,
usually near the middle of the cell, either dividing it or wholly external,
rarely terminal, 16-18/x in diameter; spore wall as in zygospores. (PI.
XV, Fig. I.)
United States: Oklahoma; Florida.
Named for the collector Celeste Taft.
25. MouGEOTiA NUMMULoiDEs (Hassall) dc Toni 1889. Sylloge
Algarum. I, Ft. 2, p. 713.
Vegetative cells 8-16 /x x 32-1 60 /a; chromatophores with 2-6 pyre-
noids in a row; conjugation scalariform; zygospores in the conjugating
tubes, globose to ovoid {i']-)22--p.{-T^'])ix in diameter; spore wall
brown, scrobiculate; aplanospores ovoid, within the angled sporogenous
cell. (PI. XV, Figs. 2-3.)
United States: Iowa to Maine; North Carolina; Florida.
British Isles to Finland and Bulgaria.
Specimens collected from a fountain, Miami Beach, May 2, 1926, were
fruiting abundantly and had many filaments with several-celled branches.
26. MouGEOTiA SINENSIS Li 1933. Ohio Jour. Set. 33, p. 152.
Vegetative cells 15-22 ju, x 100-132^1; chromatophore with 4-6 pyre-
noids in a single row; conjugating cells slightly geniculate; conjugation
scalariform; zygospores in the conjugating tube, ovoid to globose,
25-31
XV, Fig. 4.)
ju- X 25-31 /J.; spore wall yellow-brown, angularly reticulate. (PI.
China, Tinghai.