Notes. 
170 
O N AN ORCHID-DISEASE. — The common Orchid-disease 
known as ‘spot/ characterized by the formation of brown spots on 
the leaves, proves to be due to the presence of a species of Plasmodio- 
phora , which will be known as Plasmodiophora Orchidis. A detailed 
account of its life-history will be given in this Journal at a later date. 
G. MASSEE. 
