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28o ZYGNEMATACEAE
PLATK XVIII
MOUGEOTIA
Figs. 1-3. M. amcncana, zygospores and gametangia, and an aplanospore
with its relatively long sporogenous cell from Oneida Lake, New
York. Figs. 4-5.—M. corniculata, zygospore and vegetative cell from Bo-
hemia. Modified from figure by Hansgirg. Figs. 6-8.—M. thylespora,
zygospores and gametangia from Estonia. After Skuja. In Fig. 6 are aplan-
ospores from Florida where zygospores were found with them. Figs. 9-
10. M. uberosperma, vegetative cell, aplanospore, and zygospore from
Kentani, South Africa. Figs. 11-14. M. craterophora, four zygospores
from the Azores. After Bohlin. Figs. 15-16. M. irregularis, two zygo-
spores from Angola, Africa. After West. Fig. 17. M. delicata, zygospore
and gametangia from Austria. After Beck. Figs. 18-20.—M. granulosa,
vegetative cell, parthenospore, and two zygospores from Cape Town, South
Africa. Figs. 21-22.—A/, elegantula, zygospores and an aplanospore. Fig.
21 after Wittrock. Figs. 23-25.—M. boodlei, two aplanospores and the
very rare zygospore, from Charleston, Illinois. Figs. 26-31. M. capucina,
vegetative cell, zygospores, an aplanospore, and a parthenospore. The last
figure shows scalariform conjugation between two adjacent cells, from
Tupper Lake. New York.