Download PDF

204
ZYGNEMATACEAE
and scalariform; tubes formed almost wholly by the male gametangia;
fertile cells inllatcd toward the center to 29-42/^; zygospores ellipsoid,
22-32M X 50-71 m; median spore wall yellow-brown, smooth. (PI.
XXXV, Figs. 9-10.)
Austria; Czechoslovakia; China, Szechwan; South Africa.
Neither the description nor the figure of S. austriaca Czurda 1932
clearly separates it from this species.
203. Spirogyra pseudospreeiana Jao 1935. Sinensia. 6, p. 608.
Vegetative cells 16-19/^ x 140-210/i, with replicate end walls; i
chromatophore, making 2.5 to 8 turns in the cell; conjugation scalar-
iform; tubes formed by the male gametangia; fertile cells inflated
toward the middle up to 39 i^, especially on the conjugating side; zygo-
spores ellipsoid, 27-35/A x 45-64/^; median spore wall yellow-brown,
smooth. (PI. XXXV, Fig. II.)
China, Szechwan, December, 1933.
204. Spirogyra pascheriana Czurda 1932. Susswasserflora Mittel-
europa. 9, p. 150.
Vegetative cells 18-21 ^i x 120-170 /x, with replicate end walls; i
chromatophore; conjugation lateral and scalariform; tubes formed
mostly by the male gametangia; fertile cells more or less cylindrically
inflated, up to 60 jj.; zygospores ellipsoid, 45-50^1 x 80-95 ju.; median wall
yellow-brown, smooth, with distinct suture. (PI. XXXV, Figs. 12-13.)
United States: Minnesota, Grand Marais (Nichols Coll.), June, 1936.
Czechoslovakia, Prague.
205. Spirogyra hopeiensis Jao 1935. Sinensia. 6, p. 608.
Vegetative cells 26-29 ju, x 154-400 m, with replicate end walls; i
chromatophore, making 2 to 6 turns in the cell; conjugation scalariform;
tubes formed by the male gametangia; fertile cells inflated on
the conjugating side up to 55^1; zygospores ellipsoid, 32-48^11 x 61-96 /x;
median spore wall smooth, yellow. (PI. XXXV, Fig. 17.)
China, Hopei and Szechwan; in the former province in June, in the
latter in December.
206. Spirogyra farlowii Transeau 19 15. Ohio Jour. Sci. 16, p, 29.
Phycoth. Bor.-Amer., No. 362.
Vegetative cells 24-30^1 x 70-400/i., with replicate end walls; i
chromatophore, making 2.5 to 6 turns; conjugation scalariform and
lateral; tubes formed by both cells; fertile cells inflated to 39-60 m; zygo-
spores and aplanospores ellipsoid, ends more or less pointed, 32-45
48-96/i; median spore wall yellow, smooth. (PI. I, Fig. 3.)
/i x