Fig. 60 Spirogyra. A, B, rhizoid formation in 5. fluviatilis. C, 

 rhizoids and haptophores of 5. adnata. D-G, stages in conjuga- 

 tion, 5". varians. H, germination of zygospore in 5. neglecta. (A, B, 

 after Czurda; C, after Delf; D-G, after Saunders; H, after 



Fritsch.) 



107 



