PLATE CXV. 
O 
Fig. 2. — Peronospora alsinearum. 
Oogonia and Antheridia enlarged 400 diameters. 
Fig. 3. — The Artotrogus of Montagne and Berkeley. 
Enlarged 400 diameters. 
Fig. 4. 
Peronospora umbelliferarum. 
Oogonia and Antheridia 
enlarged 400 diameters. 
Fig. 5. — Peronospora infestans. 
Oogonia and Antheridia from badly diseased leaves of Potato, after a week’s maceration 
in water; enlarged 400 diameters. Antheridium ^ = -0004 inch. 
Oogonium = '001 inch. Coat of Cellulose = '00142 inch. 
