250 ZYGNEMATACEAE 



PLATE III 



Zygnema 



Fig. I. — Z. sinense, zygospores and gametangia from Szechwan, China. 

 After Jao. Figs. 2-3. — Z. globosuni, conjugation pattern and detail of spore 

 walls from Bohemia. After Czurda. Fig. 4. — Z. adpectitnitum, gametangia 

 and zygospore from Charleston, Illinois. Fig. 5. — Z. areolatum, gametangia 

 and zygospores from Smithville, Oklahoma. Fig. 6. — Z. pectinatum, scalar- 

 iform and lateral conjugation, aplanospore, and zygospores with spore wall 

 markings, from Cofileen, Illinois. Fig. 7. — Z. excrassum, zygospores and 

 gametangia from Casey, Illinois. Fic. 8. — Z. neopectinatum , gametangia 

 and zygospore from Illinois. Figs. 9-10. — Z. giganteiitn, aplanospore. zygo- 

 spores and parthenospores from Punjab, India. Modified after Randhawa. 

 Figs. 11-12. — Z. gedeanum, lateral conjugation, zygospore, and partheno- 

 spores from Java. After Czurda. Figs. 13-14. — Z. czurdae, zygospores after 

 partial disintegration of the gametangial walls, from Punjab, India. After 

 Randhawa. 



