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ZYGNEMA 29
27. Zygnema gorAkhporense Singh 1938. ]our. Indian Bot. Soc.
17, p. 370.
Vegetative cells ^^-^yii x 66-83;".; conjugation scalariform; zygo-
spores formed in the tubes and extending into the gametangia; zygo-
spores ovoid to globose, 30-36 /a x 36-43/1; median wall blue, scrobic-
ulate; pits about 4/* in diameter and 1-31". apart.
India, Gorakhpur, October 8, 1936.
28. Zygnema ma jus Czurda 1932. Siisswasserftora Mitteleuropa.
9, p. 106. Fritsch & Rich. Trans. Roy. Soc. S. Africa, 9,
p. 56. 1921.
Vegetative cells 27-30/1. x 27-90 /a; conjugation scalariform; zygospores
formed in the conjugating tubes, globose to ovoid, /a 33-48 x
42-50 /a; median spore wall blue, smooth.
Africa, Transkei Territory.
29. Zygnema kiangsiense Li 1938. Bull. Fan Mem. Inst. Biol.
8, p. 94.
Vegetative cells 32-38 /a x 36-50 /a; conjugation scalariform; zygospores
formed in the conjugating tubes, ovoid to subglobose, 36-46 /a x
44-58 /a; median spore wall blue, coarsely scrobiculate; pits 3-5 /^ in
diameter, 4-7 /a apart. (PI. IV, Fig. 5.)
China, Kiangsi.
30. Zygnema ralfsii (Flassall) de Bary 1858. Untersuchungen
Uber die Familie der Conjugaten, p. 77.
Vegetative cells 14-20 /a x 38-80 /j^; conjugation scalariform; zygo-
spores formed in the conjugating tubes, 15-25 /a x 25-35 /a; median spore
wall brown, smooth. (PL IV, Fig. 6.)
United States: Pennsylvania, Harrisburg (Wolle).
British Isles and continental Europe.
31. Zygnema micropunctatum Transeau 1934. Trans. Amer.
Micros. Soc. 53, p. 210, PL 17, Fig. 13.
Vegetative cells i4-i6a