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194<br />
ZYGNEMATACEAE<br />
Most of the early records were based on vegetative filaments. Found hybridizing<br />
with S. nitida at Starkville, Mississippi. Found conjugating with<br />
5. communis by Andrews, 191 1.<br />
168. SpmoG"iTiA MANORAMAE Randhawa 1938. Proc. Indian Acad.<br />
Set. 8, p. 360.<br />
Vegetative cells 80-90 /j. x 80-160 )u., with plane end walls; 7 to 10<br />
chromatophores, straight, or making .5 turn in the cell; conjugation<br />
scalariform; tubes formed by both gametangia; fertile cells more or less<br />
inflated; zygospores lenticular, 75-86 /^ x 58-80 /x; median wall yellowbrown,<br />
irregularly corrugate and finely verrucose-punctate. (PI. XXXII,<br />
Fig- 7-)<br />
India, Basti, Upper Punjab.<br />
169. Spirogyra jatobae Transeau 1938. Amer. Jour. Bot. 25,<br />
p. 527, Figs. 14-15.<br />
Vegetative cells 1 18-130 /j- x 108-500 m, with plane end walls and<br />
8-1 1 chromatophores, straight or making i turn in the cell; conjugation<br />
scalariform; tubes formed by both gametangia; receptive gametangia<br />
slightly inflated, especially on the conjugating side; zygospores com-<br />
pressed-spherical, 108-140 /i. x 78-90 i".; median wall yellow-brown, irreg-<br />
ularly and minutely verrucose. (PI. XXXII, Figs. 8-9.)<br />
Brazil, Jatoba, October 3, 1933 (Drouet Coll.).<br />
170. Spirogyra maxima (Hassall) Wittrock 1882. Bot. Notiser.<br />
P-57-<br />
Vegetative cells 1 18-140 /j. x 100-250 jh, with plane end walls; 6 to 7<br />
chromatophores, making .2 to .8 turn; conjugation scalariform; tubes<br />
formed by both gametangia; fertile cells cylindric; zygospores lentic-<br />
ular, 100-125 /x x 75-95iu^; median spore wall golden-brown, reticulate.<br />
(PI. XXXII, Figs. lo-ii.)<br />
United States: California; Wisconsin; and the eastern half of the<br />
United States.<br />
Europe; South America; Australia; India; China.<br />
Found hybridizing with S. submaxima (No. 159) at Charleston, Illi-<br />
nois. Woile collected specimens of S. maxima hybridizing with S. nitida.<br />
These were distributed as No. 541, in Wittrock and Nordstcdt's Algae<br />
Exsiccatae.<br />
171. Spirogyra heeriana Nageli 1849. In Kiitzing, Species Algarum,<br />
p. 442. Tabulae p/iycologicae. 5, PL 28, Fig. 3.<br />
Vegetative cells 130-150 /a x i 30-250 m, with plane end walls; about<br />
8 chromatophores, making .5 to i turn in the cell; conjugation scalar-<br />
iform; tubes formed by both gametangia; fertile cells not inflated,
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