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174<br />
ZYGNEMATACEAE<br />
89. Spirocyra splendida G. S. West 1914. Mem. Soc. Neucha-<br />
teloise Sci. Nat. 5, pp. 10 13-51.<br />
Vegetative cells 158-166/1 x 210-330 m, with plane end walls; 5 to 6<br />
chromatophores, making i.t, ro 2 turns in the cells; conjugation<br />
scalariform; tubes formed by both gametangia; fertile cells cylindric;<br />
zygospores ellipsoid, about 1^5^^ x 216/u.; median spore wall yellow,<br />
smooth. (PI. XXVII, Fig. 17.)<br />
South America, Colombia, Cundinamarca.<br />
90. Spirogyra emilianensis Bonhomme 1858. Sur quelques algues<br />
d'eau douce, p. 7, PI. 2, Fig. 2.<br />
Vegetative cells 50-60 /x x 100-200 /m, with plane end walls; 4 to 5<br />
chromatophores, making .2 to 2.5 turns; conjugation scalariform; tubes<br />
formed by both gametangia; fertile cells cylindric; zygospores ovoid,<br />
52-60/U. X 90-124/i; median spore wall brown, smooth. (PI. XXVII,<br />
Fig. 12.)<br />
United States: Massachusetts, Boston (Bullard Coll.).<br />
France.<br />
91. Spirogyra exilis W. & G. S. West 1907. Ann. Roy. Bot. Gard.,<br />
Calcutta. 6, p. 186.<br />
Vegetative cells 27-30^1 x 42-120 /x, with plane end walls; 2 broad<br />
chromatophores, making 1.5 to 2 turns; conjugation scalariform; tubes<br />
formed by both gametangia; fertile cells enlarged on the inner face, or<br />
cylindrical; sterile cells often greatly inflated to 49 m; zygospores ovoid<br />
to oblong, 27-30 ju.<br />
XXVII, Fig. 13.)<br />
X 36-45^1; median spore wall yellow, smooth. (PI.<br />
Burma.<br />
92. Spirogyra distenta Transeau 1934. Ohio Jour. Sci. 34, p. 420.<br />
Fritsch. Trans. Roy. Soc. S. Africa. 9, p. 46, as S. decimina<br />
var. infiata.<br />
Vegetative cells 48-52 /x x 8i-i8o/i, with plane end walls; 2 chro-<br />
matophores, making 1.5 to 2 turns; conjugation scalariform; tubes<br />
formed by both gametangia; fertile cells cylindric or enlarged; sterile<br />
cells inflated to 75/x; zygospores ovoid, 49-55/^ x 50-1 00 /t; median spore<br />
wall yellow, smooth.<br />
United States: Illinois; Kentucky; Ohio.<br />
South Africa.<br />
93. Spirogyra triplicata (Collins) Transeau 1944. Ohio Jour.<br />
Sci. 44, p. 243. Collins, F. S. S. decimina var. triplicata.<br />
Phycoth. Bor.-Amer., No. 960. Green Algae of North<br />
America, p. no. 1912.
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