ruNGi. 155 



supposed resting-spores. It is quite unnecessary 

 in a work of this character to enter upon all the 

 details of the examinations, suffice it to say that 

 the presumed oospores were found to develop by 

 germination a mould which was identical in its 

 branchings, and its method of fruiting with the 

 potato mould, so that it became evident to all dis- 

 interested and unprejudiced persons, that the chain 

 in the history of these brown bodies had been com- 

 pleted. The potato mould produced the brown 

 bodies upon its mycelium, the brown bodies rested 

 for a season, and then by germination produced 

 again the original potato mould of the first genera- 

 tion.* The Eoyal Horticultural Society awarded 

 the Gold Medal to Mr. Worthington Smith for his 

 discovery, and Professor De Bary has subsided into 

 silence. 



There is, however, one suggestion made by Pro- 

 fessor De Bary which will, without doubt, be ac- 

 cepted, which is, that the peculiar structure of the 

 potato mould in producing acrospores in succession 

 at the tips of the threads, differs so much from 

 other species of Peronospora, that a new genus and 

 name is advisable, for which he proposes Phyto- 

 phthora infestans. 



* See details of these experiments, and of the animated dis- 

 cussion which ensued, in the " Monthly Microscopical Journal" 

 for September, 1875, and September, 1876. 



