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20O ZYGNEMATACEAE
187. Spirckiyra esthonica (Skuja) Czurda 1932. Siisswasserfiora
Mitteleiiropa. 9, p. 180, Fig. 191. Acta Horti Bot. Unit/.
Latuiensis. 3, p. 109 (as S. punctata var. esthonica).
Vegetative cells 27-33^0. x 90-360 /a, with plane end walls; i chromatophore,
making 3 to 9 turns in the cell; conjugation scalariform;
tubes formed largely by the male gametangia; receptive gametangia
inflated up to 60 /x; gametangia usually separated by sterile cells; zygospores
ellipsoid, 39-50M x 64-115/it; median wall irregularly corrugate
with minute punctations between the ridges. (PI. XXXIV, Figs. 2-3.)
Estonia, July, 1927.
188. Spirogyra suomiana Transeau 1934. Ohio Jour. Sci. 34,
p. 420. Hirn, Karl E. Acta Soc. pro Fauna et Flora Fen-
nica. 11 (10), p. 10, PL i, Fig. 3. 1895.
Vegetative cells 33-40 m x 100-240 /a, with plane end walls; i chro-
matophore, making several turns in the cell; conjugation scalariform;
tubes formed by the male gametangia; receptive gametangia inflated to
58-73 /x; gametangia separated by much longer sterile cells; zygospores
ovoid, 45-53 A^ X 75-90 /m; median wall golden yellow, coarsely punctate.
(PI. XXXIV, Fig. 4.)
Finnish Lapland; China, Tsingtao (Li Coll.); Manchuria.
189. Spirogyra punctiformis Transeau 1914. Amer. ]our. Bot.
1, p. 294.
Vegetative cells ly-Tpi*. x 120-390^1, with plane end walls; i or 2
chromatophores, making 3 to 6 turns; conjugation scalariform; con-
jugating tubes usually produced by the male gametangia; fertile cells
in pairs or singly between vegetative cells, inflated to 45-50 a^; zygo-
spores ovoid, 40-48 /x X 60-iiOiLi; median spore wall yellow, punctate.
(PI. XXXIV, Figs. 5-6.)
United States: Iowa; Illinois.
190. Spirogyra reflexa Transeau 1915. Ohio Jour. Sci. 16, p. 28.
Vegetative cells 30-44 a^ x 120-300^1, with plane end walls; i chromatophore,
making 3 to 8 turns; conjugation scalariform; tubes formed
by the male gametangia; fertile cells inflated or enlarged and strongly
reflexed, single or in groups of 2 or 4; zygospores and aplanospores
ellipsoid, 44-64/j. x 90-150/^-; median spore wall yellow-brown, smooth.
(PI. XXXIV, Figs. 7-8.)
United States: Illinois; Michigan; Indiana; Mississippi.
191. Spirogyra micropunctata Transeau 1915. Ohio Jour. Sci.
16, p. 27.
Vegetative cells 30-36/x x 120-300^, with plane end walls; i chro-