Download PDF

326
ZVCiNHMATACEAE
PLATE XLI
/yg(k7onium, Zygnema, and Spirogvka
Figs. 1-5. Zygogonium stephensiae, \egetati\'e cells, and gamctangium
(note relative length); iinmaturc and mature zygospores by scalariform
conjugation; conjugation through end wall and mature spore; and the only
instance of lateral conjugation seen in the abundant collections from Cape
Colony. Figs. 6-7. Zygnema mucigeniim, scalariform and lateral conjuga-
tion, and mature spores from northern India. After Randhawa. Figs. 8-9.
—Spirogyra sibiriia, bullate sterile cell, scalariform conjugation, zygospores,
and spore wall markings from Lake Zaisan region, Russia. After Skvortzof.
Figs, io-ii.—5. czurdae, scalariform conjugation, zygospores, and spore
markings from Kashmir, India. After Misra. Fig. 12. S. australensis,
vegetative cells and zygospore from Australia, Queensland. After Mobius.
Figs. 13-15. S. pseudoreticulata, lateral and scalariform conjugation, spore
form, and details of spore markings. After Borge. Fig. 16. S. azygospora,
aplanospores, and sporangia from north India. After Singh. Fig. 17. S. in-
signis, vegetative cell, gametangia, and zygospore. After Petit. Fig. 18.
5. macrospora, spores and gametangia from India. After Rao. Fig. 19.—5.
verrucosa, gametangia and zygospores from central India. After Rao. Figs.
20-21. S. indica, lateral and scalariform conjugation. After Rao. Figs. 22-
23. S. marchica, mature spores following scalariform and lateral conjuga-
tion. After Krieger.