274 



ZYCINEMATACEAE 



PLATE X\' 



Mot'GEOTIA 



Fig. I. — A/, aiclcstis, zygospore and two aplanospores with local thick- 

 ening of sporangial walls, from Miami, Oklahoma. Figs. 2-3. — M. num- 

 muloides, three aplanosporangia with characteristic bend where the spore 

 is formed, and a zygospore and gametangia, troni Burgaw, North Carolina. 

 Fig. 4. — A/, sinensis, two zygospores with reticulate median spore wall, from 

 Tinghai, China. After Li. Fig. 5. — M. mcgaspora, zygospore and gam- 

 etangia, from Sweden. After Wittrock. Figs. 6-7. — A/, ornata, zygospores 

 and detail of spore walls, from Szechwan, China. After Jao. Fig. 8. — M. 

 micropora, zygospore and gametangia, from Oklahoma. Figs. 9-1 i. — 

 A/, areolata, aplanospore, zygospore, and details of spore wall, from Oveida 

 Springs, Florida. Fig. 12. — M. sumatrana, zygospore and gametangia, from 

 Sumatra. After Schmidle. Fig. 13. — M. talyschensis, zygospores and gam- 

 etangia, from Baku, U.S.S.R. After Woronichin. Fig. 14. — M. gotlandica, 

 zygospore with characteristic spore markings, from Sweden. After Wittrock. 

 Figs. 15-16. — A/, globulispora, zygospore and details of spore wall, from 

 Szechwan, China. After Jao. Fig. 17. — M. laevis, zygospore and gam- 

 etangia, from England. After Archer. Figs. 18-19. — M. lamellosa, zygo- 

 spore, gametangia, and spore wall details, from Szechwan, China. After 

 Jao. Fig. 20. — A/, microverrucosa, zygospores and gametangia from Ger- 

 many. After Kricger. 



