ZYCiNEMATACHAE 



PLATE V 



Zygnema 



Fig. I. — Z. substcllinitni , vegetative cells and the enlarged receptive 

 gametangia from Bartlesviile, Oklahoma. Fic. 2. — Z. lutcosporum, gam- 

 etangia and zygospore from Bohemia. After Czurda. Fig. 3. — Z. fiuvum, 

 zygospore, vegetative cells, and akinete from Eden, Texas. After Taft. 

 Fig. 4. — Z. calosponim, zygospores and vegetative cell from Szechwan, 

 China. After Jao. Fig. 5. — Z. vaucherii, gametangia and zygospores from 

 Cape Cod, Massachusetts. Fig. 6. — Z. normani, zygospore and gametangia 

 from Norman, Oklahoma. After Taft. Fig. 7. — Z. iubcriiciatiim, zygo- 

 spores and gametangia from China. After Jao. Figs. 8-9. — Z. germanictim 

 zygospores and gametangia from Germany. After Czurda. Figs. 10-12. — 

 Z. insignc, conjugation patterns and zygospores. After Jao, and de Bary. 

 Figs. 13-14. — Z. janicutn, scalariform conjugation and zygospores from 

 China. After Li, and Jao. Fig. 15. — Z. subjanicum, zygospore and gam- 

 etangia from China. After Jao. Fig. 16. — Z. stellinum, aplanospores and 

 zygospores from Starkville, Mississippi, April, 1925. Note relative length of 

 aplanosporangia and gametangia. (See also Plate I and Plate VI.) 



