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276 ZYCNFAfATACEAE
PLATE XVI
MOUGEOTIA
Fig. I.—A/, pulchclla, vegetative cell and zygospores from Douglas
Lake, Michigan. Figs. 2-4.—M. robusta, vegetative cells, zygospores, and
gametangia Irom Winchester, Massachusetts. A cell in which the chro-
matophore has divided completely with the nucleus between the halves is
represented in Fig. 4. One not infret]uently Hnds chromatophores ot this
and a few other species with ends cleft to various depths. Fig. 5.—.V/. day-
tonae, zygospore and gametangia from Daytona, Florida. Fig. 6. M.
handelii, zygospore, gametangia, and vegetative cell from Yiinnanfu, China.
After Skuja. Fig. 7. M. sanjordiana, from Daytona, Florida. Fig. 8.
M. oblongata, a pair of zygospores with attached gametangia from Fort
Myers, Florida. Figs. 9-11. M. laetevirens, two forms of zygospore and
an aplanospore from Long Island, New York. Fig. 12. M. varians, zygo-
spore from Sweden. After Wittrock. Figs. 13-15. M. opelousensis, three
zygospores seen at different angles, from Opelousas, Louisiana. After Taft.
Fig. 16.—A/, angolensis, zygospore from Angola, Africa. After West.
Fig. 17. M. gelatinosa, zygospore wifh pectic sporangium wall from
Sweden. After Wittrock.