28o ZYGNEMATACEAE 



PLATK XVIII 



MOUGEOTIA 



Figs. 1-3. — M. amcncana, zygospores and gametangia, and an aplan- 

 ospore with its relatively long sporogenous cell from Oneida Lake, New 

 York. Figs. 4-5. — M. corniculata, zygospore and vegetative cell from Bo- 

 hemia. Modified from figure by Hansgirg. Figs. 6-8. — M. thylespora, 

 zygospores and gametangia from Estonia. After Skuja. In Fig. 6 are aplan- 

 ospores from Florida where zygospores were found with them. Figs. 9- 

 10. — M. uberosperma, vegetative cell, aplanospore, and zygospore from 

 Kentani, South Africa. Figs. 11-14. — M. craterophora, four zygospores 

 from the Azores. After Bohlin. Figs. 15-16. — M. irregularis, two zygo- 

 spores from Angola, Africa. After West. Fig. 17. — M. delicata, zygospore 

 and gametangia from Austria. After Beck. Figs. 18-20. — M. granulosa, 

 vegetative cell, parthenospore, and two zygospores from Cape Town, South 

 Africa. Figs. 21-22. — A/, elegantula, zygospores and an aplanospore. Fig. 

 21 after Wittrock. Figs. 23-25. — M. boodlei, two aplanospores and the 

 very rare zygospore, from Charleston, Illinois. Figs. 26-31. — M. capucina, 

 vegetative cell, zygospores, an aplanospore, and a parthenospore. The last 

 figure shows scalariform conjugation between two adjacent cells, from 

 Tupper Lake. New York. 



