EXPLANATION OF PLATE II 

 Phycomycetes 



Fig. I. Septocarpiis coryncpJiortis (Chytridiales) parasitic on 

 diatom. X 500. ( Redrawn from Zopf. ) 



Fig. 2. Miicor Miicedo (INIucorales) 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 Miuedo (Mucorales). Mature zygospore showing the 

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



Fig. 5. Piptoccphalis Freseniana (MucoRALEs). Conidia X 200. 

 (Redrawn from Brefeld.) 



Fig. 6. Piptocephalis Freseniana (MucORALES). Haustoria attached 

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

 400. ( Redrawn from Brefeld. ) 



Fig. 7. Piptocephalis Freseniana (jMucorales). Sexual reproduc- 

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

 drawn from Brefeld. ) 



Fig. 8. P Hobo his Kleinii (Mucorales). Sporangial stage. X 150. 

 (Redrawn from Brefeld.) 



Fig. 9. Pilobobis crystallimcs ( MucORALES ) . Sexual reproduction 

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



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