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ZYGNEMA 43
88. Zygnema subcylindricum Krieger 1941. Zygnemales. Raben-
horst's Kryptogamenflora. 13, p. 262.
Vegetative cells 28-35 /a ^ 54~7i'^5 reproduction by aplanospores
only; spores cylindric filling the cells, 29-33 m ^ 55~70^5 median wall
brown, granulose and with shallow pits,
(PL VII, Fig. 13.)
and 1-2 m irregular sutures.
Germany; Bohemia.
This is the Z. cylindricum figured by Czurda. It differs from Z. cylindrtcum
Transeau in the granulose markings on the spore wall.
89. Zygnema irregulare Krieger 1941. Zygnemales. Rabenhorst's
Kryptogamenflora. 13, p. 263.
Vegetative cells 40-42 /a x 68-82 ju,; reproduction by aplanospores
only; spores cylindric-ovoid with very heavy walls; median wall brown,
outwardly finely verrucose, with irregularly and widely separated pits
3-6m in diameter and 4-26/i. apart. (PI. VII, Fig. 8.)
Germany, Mark Brandenburg.
SPECIES NOT IN PROPER SEQUENCE
90. Zygnema mucigenum Randhawa 1938. Proc. Indian Acad.
Sci. 8, p. 141, Fig. 25.
Vegetative cells 12-14/A x 50-100^1; conjugation both lateral and
scalariform; zygospores in one of the gametangia, which is enlarged
near the spore; zygospores compressed-globose, 20-22 jia x 30-36^; me-
dian spore wall dark blue-green, with scattered punctations; pits 1-1.5^^
in diameter, 3-4M apart. (PI. XLI, Figs. 6-7.)
India, Fyzabad district, December 15, 1937.
Should be placed near Number 68.
91. Zygnema gangeticum Rao 1937. Jour. Indian Bot. Soc. 16,
p. 270.
Vegetative cells i6-20iu. x 40-60 /x; conjugation scalariform and lat-
eral, zygospores formed in the conjugating tubes and extending into
the gametangia; zygospores globose to ovoid, 30-36 /x x 30-45 m; median
spore wall yellow-brown and smooth.
India, United Provinces, Ganges.
Should be near Number 3.
92. Zygnema kwangtungense Ley 1944. Sinensia. 15, p. 97.
Vegetative cells 38-42 ju. x 25-75 /x; conjugation scalariform; recep-
tive gametangia slightly inflated; zygospores globose or subglobose,
slightly compressed, 44-61 ju, x 39-72 /a; outer spore wall smooth, transparent;
median wall 7-iiAc thick, lamellate and foveolate; pits very