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96
ZYGNEMATACEAE
27. MouGEOTiA MECAspoRA Wittrock 1 872. Bill. Kgl. SvensJ{
Vetensk,- Akad. Handl. 1 (i).
Vegetative cells 17-21
/x. x 170-380 /x; conjugation scalariform; zygo-
spores in the conjugating tube, globose, 40-50/i, or ovoid, 41-44/i. x
45-48/i; spore wall brown, irregularly scrobiculate. (PI. XV, Fig. 5.)
United States: Florida, Daytona Cypress Swamp (Tiffany Coll.).
Sweden.
28. MouGEOTiA ORNATA Jao 1935. Sincnsiu. 6, p. 577, Figs. 34-35.
Vegetative cells 16-22 )u. x 76-176 /x; chromatophores with 4-10,
usually 6, pyrenoids in a single row; gametangia straight; conjugation
scalariform; zygospores in the conjugating tubes, globose to subglobose,
28-35 M '" diameter; spore wall thick, more or less regularly and dis-
tinctly punctate, with a prominent, ridged suture; margin of ridge
finely undulate; yellowish-brown at maturity. (PI. XV, Figs. 6-7.)
China, Szechwan. Collection of C. C. Jao, Herbarium, University of
Michigan, No. S587.
29. MouGEOTiA MicROPORA Taft 1934. Trans. Amer. Micros. Soc.
53, p. 218, Fig. 62.
Vegetative cells 18-23/t x 60-160 /x; chromatophores with 4-6 pyre-
noids in a row; conjugation scalariform; zygospores in the conjugating
tube, globose to ovoid, or rarely slightly compressed-ovoid, 26-36 m x
26-30 /x; outer sporangium wall a pectic layer 5-12 /a in thickness; spore
wall brown, distinctly punctate; pores .5-1 m in diameter. (PI. XV,
Fig. 8.)
United States: Oklahoma; Michigan; Florida.
30. MouGEOTiA AREOLATA Traiiscau 1934. Trans. Amer. Micros.
Soc. 53, p. 219, Figs. 47-49.
Vegetative cells 17-26 /x x 90-400 /n; cross walls more refractive than
lateral walls and slightly colligate; chromatophores with 4-10 pyrenoids
in a row, occupying from two-thirds to one-fourth the cell length; con-
jugation scalariform; zygospores in the conjugating tubes, dolioform,
with the ends short or extended, 43-50^ x 50-70^1; wall frequently in
3 layers, the outer a thin, yellow, minutely punctate membrane, the
second a heavy, yellow areolate wall with a prominent equatorial ridge
and suture, the innermost wall thin and hyaline; aplanospores asym-
metrically ovoid, 27-33 /x X 55-66 /x, markings similar to those of the
zygospores. (PI. XV, Figs. 9-1 1.)
United States: Florida, Oveida Springs (O'Neil Coll.).
31. MouGEOTiA suMATRANA Schmidle 1895. Hedwigia. 34, p. 297.
Vegetative cells 20-24 /x ^ 80-220 /x; chromatophore with scattered