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SPIROGYRA 199<br />
found the earlier stages of conjugation. It is therefore easy to understand<br />
why Professor Ivey Lewis proposed a new genus for this species and gave it<br />
the name Temnogyra. The species is named in honor of Frank S. CoUins<br />
of Maiden, Massachusetts, who published The Green Algae of North<br />
America in 1909 and numerous other papers on fresh-water and marine<br />
algae.<br />
184. Spirogyra punctata Cleve 1868. Nova Acta Reg. Soc. Sci.<br />
Upsali. Ser. 3, 6, p. 23, PL 4, Figs. 1-4.<br />
Vegetative cells yu, 24-30 x 70-360 jti, with plane end walls; i chromatophore,<br />
making 3 to 8 turns in the cell; conjugation lateral and<br />
scalariform; tubes formed by the male gametangia; gametangia single,<br />
or in pairs, separated by much longer sterile cells in each filament; fer-<br />
tile gametangia inflated to /u.; 45 zygospores ellipsoid, 28-43 /a x 42-78 m;<br />
median spore wall coarsely punctate, yellow. (PL XXXIV, Fig. i.)<br />
United States: Iowa to Massachusetts and New Jersey.<br />
Reported from Europe, Afghanistan, China, and Australia.<br />
Some of the older records would now be changed to other species of the<br />
"punctata group" since they were probably made on the basis of the tubes<br />
and of the contrast between gametangia and sterile cells. The species<br />
described by Jao as S. collinsii var. ampla {Trans. Amer. Micros. Soc, 54,<br />
p. 2. 1935) seems to belong here, and I have used his drawing to illustrate<br />
this species.<br />
185. Spirogyra sirogonioides Hughes 1943. Abstracts of Doctoral<br />
Dissertations. The Ohio State University, 40, 1943.<br />
Vegetative cells 17-22 /^ x (60-) 160-220^1 with plane end walls; i<br />
chromatophore, making 3 to 6 turns in the cell; conjugation lateral and<br />
scalariform; tubes formed mostly by the male gametangia, sometimes<br />
becoming very broad at maturity; receptive gametangia inflated on the<br />
conjugating side; zygospores ellipsoid, 35-39 /^ x 58-67 /a; median wall<br />
yellow-brown, ornamented with variably shaped and irregularly dis-<br />
tributed scrobiculae. (PL XXXIII, Figs. 7-8.)<br />
Canada, Charleston, Queens County, Nova Scotia, July, 1941, and 1942.<br />
The specific name was suggested by the fact that occasional mature<br />
pairs of gametangia have the appearance of conjugated cells in Sirogonium.<br />
186. Spirogyra lushanensis Li 1938. Bull. Fan Mem. Inst. Biol.<br />
8, p. 92, PL 2, Figs. 4-5.<br />
Vegetative cells 17-23/^ x 84-1 ft, 58 with plane end walls; i chro-<br />
matophore, making 3.5 to 7 turns in the cell; conjugation scalariform;<br />
tubes formed wholly by the male gametangia; fertile cells inflated to<br />
38 ft and shortened; zygospores ellipsoid, 26-36^1 x 42-78 /x; median wall<br />
irregularly reticulate, yellow. (PL XXXIII, Fig. 6.)<br />
China, Kiangsi, Lushan, September, 1936.