294 ZYGNEMATACEAE 



PLATE XXV 



Spirogvka 



Figs. 1-2. — S. subpapulata, zygospores, aplanosporcs, aiui sterile cells 

 from Szechwan, China. After Jao. Figs. 3-5. — S. papulata, scalariform and 

 lateral conjugation, zygospores, and spore wall pattern from Szechwan. 

 After Jao. Figs. 6-7. — S. scrobiculata, scalariform conjugation, zygosjwres, 

 and details of spore wall from Austria. After Czurda. Fig. 8. — S. aphano- 

 sculpta, scalariform conjugation and zygospores from Cireece. After Skuja. 

 Figs. 9-10. — S. daedalea, scalariform conjugation, zygos[x»res, and spore 

 wall pattern, from Yugoslavia. After Czurda. Fig. ii. — S. f^affirita, zygo- 

 spores and gametangia from South Africa. Fic. 12. — S. ghosei, gametangia 

 and mature zygospores from India. After Singh. Figs. 13-15. — S. daedci- 

 leoides, vegetative cell, lateral and scalaritorm (.onjiigation, and zygospores 

 from Latvia. After Skuja. 



