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MOUGEOTIA loi
cylindric, with concave ends and sides, formed in the tubes, 55-64 /^ x
30-34 m; spore wall yellow punctate; punctations about .8 /a in diameter
and evenly spaced over the entire wall. (PI. XVI, Figs. 13-15.)
United States: Louisiana, Opelousas, 1938.
49. MouGEOTiA DEPRESSA (Hassall) Wittrock 1880. SJ^andinaviens
Vaxter. 4, p. 23.
Vegetative cells 7-12/A x 35-144JU,; conjugation scalariform and lat-
eral; zygospores in the conjugating tubes, compressed-ellipsoid with the
longer axis parallel to the filaments, 28-32 /x x 12-14 /x; spore wall
brown, punctate. (PI. XVII, Fig. i.)
United States: Mississippi; Florida.
British Isles; Germany; Sweden; Luxemburg; Switzerland.
When the spores are immature there is a distinct pectic layer on the
sporangium wall.
50. MouGEOTiA ovALis (Hassall) Nordstedt 1886. Bot. Notiser
1886. p. 136.
Vegetative cells ii-i4iU, x iio-140/u; conjugation scalariform; zygo-
spores in the conjugating tubes, compressed-ovoid to subglobose,
29-38 /x x 26-36 /x; spore wall finely scrobiculate, brown. (PI. XVII,
Figs. 2-3.)
British Isles; Italy; Germany; Switzerland.
It seems probable that specimens will be found with a pectic layer on
the sporangium walls.
51. MouGEOTiA PECTosA Transeau 1934. Trans. Amer. Micros.
Soc. 53, p. 220, Figs. 53-54.
Vegetative cells 14.5-19,", x i:io-i^oix\ chromatophores with 4-8
pyrenoids in a single row; conjugation scalariform, but less frequent
than reproduction by aplanospores; zygospores in the conjugating tubes
enclosed in a 5-10 /a thick pectic sporangium wall, compressed-globose,
26-29 /x ^ 20-22 A*; spore wall colorless, smooth; aplanospores globose to
compressed-globose, formed partly within or largely outside the mother
cells, 18-21 /x in diameter, when formed outside the mother cell covered
with a pectic layer. Spores may not have been fully mature. (PI. XVII,
Figs. 4-6.)
United States: Florida (Tiflfany Coll.).
52. MouGEOTiA GELATiNosA Wittrock 1 889. Wittfock and Nord-
stedt Algae Exsiccatae, No. 957.
Vegetative cells i2-i8f(. x 1 20-1 80 /x; chromatophores with 3-6 pyrenoids
in a single row; conjugation scalariform; zygospores in the con-
jugating tubes, compressed-ovoid, 38-47 ju- x 28-39 /x, ^^^ including the