.78 ZYGNEMATACEAE 



PLATE XVII 



MOUGEOTIA 



Fig. I. — A/, depressa, zygospore and garhetangia from Germany. After 

 Kiitzing. Figs. 2-3. — M. ovalis, gametangia and zygospore, and details of 

 spore wall. After Wittrock and Nordstedt. Figs. 4-6. — M. pectosa, zygo- 

 spore and aplanospores from Fort Myers, Florida. Figs. 7-8. — A/, disjuncta, 

 zygospores, one with change of sporangium wall to pectic compound, the 

 other without. Specimens from Fort Myers, Florida. Figs. 9-10. — M. 

 oedogonioides, zygospores resulting from lateral and scalaritorm conjugation. 

 Note unique remnants of conjugating tubes. Figs. 11-12. — A/, operculata, 

 gametangia, zygospore, and details of spore wall from Florida. Figs. 13- 

 14. — A/, atubulosa, zygospores in pectic-walled sporangia, and details of 

 spore wall from Java. After Krieger. Figs. 15-17. — A/, cycmeii, zygospores, 

 and aplanospore, and details of spore wall from Michigan. Fig. 18. — A/. 

 caimani, part of group of interconjugating filaments from Haiti. Figs. 19- 

 20. — M. transeaui, two forms of zygospores and an aplanospore from Illinois. 

 Fig. 21. — M. poinciana, zygospores and an aplanospore from Fort Myers, 

 Florida. Differs from the preceding only in having larger dimensions. 

 Fig. 22. — M. seminoleana, zygospore and aplanospore from Fort Myers, 

 Florida. Fig. 23. — M. cherokeana, zygospores and arching gametangia from 

 Oklahoma. Figs. 24-25. — M. pawhuskjxe , gametangia and zygospores, and 

 spore wall details from Oklahoma. 



