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ZVCXKMATACEAE
PLATE XXXIX
Spirogvra
Figs. 1-3. S. borysthcnicci, gametangia, zygospore, and optical sections
of spore wall from Ukraine. After Kasanofsky and Smirnoff. Fig. 4. S.
tetrapla, vegetative cell, gametangia, and zygospores from central Illinois.
Fig. 5. S. reticulata, gametangia, and zygospore with outer Jiiedian wall
partly cut away exposing the reticulations on the inner median wall from
Brazil. Fig. 6.—5. crassivallicularis, gametangia and zygospore from Massa-
chusetts. After Jao. Figs. 7-8. S. granulata, vegetative cell, receptive gam-
etangium, and zygospore from Szechwan, China, .\fter Jao. Fig. 9. S.
pseiidogranulata, receptive gametangium and zygospore from Tong-Kau,
China. After Ley. Figs, io-ii.— S. quinqucUiminata, gametangia, zygo-
spore, aplanospore, and details ot spore wall, Ironi Szechwan, China. After
jao. Fig. 12. S. jaoi, gametangia and zygospore from Tong-Kau, China.
After Ley. Fig. 13. S. che /(^iangen sis, gametangia and zygospore from
W'enchow. China. After Jao. Figs. 14-16. S. crassispina, scalarilorin and
lateral conjugation, zygospores, conjugating tubes, and details of spore wall
from Haimen, (-hina. .After Jao. Figs. 17-18.—5. sphacrocarpa, gametangia
and zygospores, trom VW-nchow, China, .\tter Jao. Fig. 19.—5. subpel-
lucida, gametangia and zygospores from Wenchow. After Jao. Fig. 20. S.
pcipingen sis, gametangia, and zygospores Irom China. After Jao.