NOTES AND MEMORANDA. 335 



living plants for he says that '* in the first days of July, 1875, 

 he saw at Metternich, not far from Cohlenz, a potato field 

 •which, to all appearance, was affected with the murrain ; a 

 closer examination, however, showed that the signs of dis- 

 ease were traceable almost entirely to Pythium Equiseti. 

 The anticipated Peronospora was not found in any of the 

 plants examined ; on the contrary, the Pythium was dis- 

 covered in a great number of plants, and in all parts of the 

 plants." It would seem not improbable, therefore, that Dr. 

 Sadebeck really met with the oospores of Peronospora 

 infestans, if one may judge from the effects and habit of the 

 parasite, no specimens being preserved or experiments carried 

 out. 



