THE 



SCIENTIFIC PROCEEDINGS 



OF THE 



ROYAL DUBLIN SOCIETY. 



Yol. XII. (I.S.), lo. 14. JME, 1909. 



CHRY80PHLYCTI8 ENDOBIOTICA, Scliilb. 



(Potato-wart or Black Scab), AND OTHER 



CHYTRIDIACE^. 



BY 



T. JOHNSON, D.Sc, F.L.S., 



PEOFESSOE OF BOTANST IN THE KOYAL COLLEGE OF SCIENCE, BOBLIN. 



(PLATES IX.-XI.) 



[/I ufhors alone are responsible forall opinions expressed in their Com municalions.^ 



DUBLIN : 



PUBLISHED BY THE POYAL DUBLIN SOCIETY, 

 LEIKSTER HOUSE, DUBLIN. 



WILLIAMS AND NORGATE, 

 14, HENRIETTA STREET, COVENT GARDEN, LONDON, W.C. 



1909. 



Price One Shilling. 





NOV 4 lb09 



