3i6 ZYCINEMATACEAE 



PLATE XXXVI 



Spirocvra 



Fig. I. — S. chuniiw, zygospores and gametangia from (!!hina. After Jao. 

 Figs. 2-4. — S. incrassata, lateral and scalariform conjugation and details of 

 spore wall from Berlin. After Czurda. Fig. 5. — 5. jovcolata, zygospore and 

 gametangia from Latvia. After Skuja. Fig. 6. — 5. discreta, zygospore and 

 gametangia from central Illinois. Fig. 7. — 5. \uusamoensis, gametangia 

 and zygospores from Finland. After Hirn. Figs. 8-9. — S. amplcctcns, 

 lateral conjugation and details of spore wall Irom China. After Skuja. 

 Figs. 10-13. — ^- g'oenlandica, vegetative cell, lateral and scalariform con- 

 jugation, zygospores, and an aplanospore from Boston, Massachusetts. 

 Figs. 14-16. — 5. quadrata, scalariform and lateral conjugation, and resulting 

 zygospores from Szechwan, China, after Jao; the aplanospores were collected 

 in Illinois. Figs. 17-18. — S. dentireticulata, zygospores and details of spore 

 wall from China. After |ao. Figs. 19-20. — S. jritsch'uina, zygospores and 

 gametangia from South Africa. After Fritsch and Rich. Fig. 21. — S. goetzei, 

 zygospores and receptive gametangia from Lake Nyassa. After Schmidle. 



