EXPLANATION OF PLATE II 

 PHYCOMYCETES 



FIG. I. Septocarpus corynephorus (CHYTRIDIALES) parasitic on 

 diatom. X 500. (Redrawn from Zopf. ) 



FIG. 2. Mucor Mucedo (MucORALEs) showing root-like hyphae and 

 sporangia borne on aerial hyphae. X 17. (Redrawn from Kerner. ) 



FIG. 3. Mucor stolonifer (MucORALEs). Early stages of conjugation : 

 A. Two hyphal branches approaching ; B. The same still farther ad- 

 vanced ; C. Suspensors cut apart from the gametes by septa. X 60. 

 ( Redrawn from De Bary. ) 



FIG. 4. Mucor Mticedo (MucORALEs). Mature zygospore showing the 

 suspensors above and below. X 100. (Redrawn from Brefeld. ) 



FIG. 5. Piptocephalis Freseniana ( MUCORALES). Conidia X 200. 

 ( Redrawn from Brefeld. ) 



FIG. 6. Piptocephalis Freseniana (MUCORALES). Haustoria attached 

 to the hypha of Mucor (shown by the two parallel lines at the left). X 

 400. ( Redrawn from Brefeld. ) 



FIG. 7. Piptocephalis Freseniana (MUCORALES). Sexual reproduc- 

 tion, showing enlarged suspensors and spinulose zygospore. X 300. (Re- 

 drawn from Brefeld. ) 



FIG. 8. Pilobohis Kleinii ( MUCORALES). Sporangial stage. X 150. 

 (Redrawn from Brefeld.) 



FIG. 9. Pilobohis crystallimis (MucORALEs). Sexual reproduction 

 showing suspensors and zygospore. X 65 . ( Redrawn from Zopf. ) 



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