Plate 74 



Fig. 1. Zygncma synod clpJitim Skuja, x about 290 (redrawn from 

 Skiija ) 



Fig. 2. Zygncma cJilalybcosperinum Hansgirg, x about 175 (re- 

 drawn from Kniep ) 



Fig. 3. Zygncmopsis dccussata (Trans.) Transeau, x about 180 

 ( redrawn from Transeau ) 



Fig. 4. Zygncmopsis Tiffaniana Transeau, x about 500 (redrawn 

 from Transeau ) 



Fig. 5. Mougcotia micropora Taft, x about 325 (redrawn from 

 Taft) 



Mougcotia sphaerocarpa Wolle, x about 190 (redrawn 

 from Transeau ) 



Mougcotia robiista (DeBary) Wittrock, x about 215 (re- 

 drawn from Transeau ) 



Spirogi/ra circumlineata Transeau, x about 144 (redrawn 

 from Transeau ) 



Spirogi/ra gratiana Transeau, x about 150 (redrawn from 

 Transeau ) 



Spirogi/ra majiiscula Kuetzing, x 125 



Spirogyra Grevilleana (Hass.) Kuetzing, x 300 (redrawn 

 from Czurda ) 



[ 808 ] 



