160 
Rhizopus necans, Mass. Parasitic on bulbs of Lilium auratum, 
received from Japan. ln 1896 and 1897 large consignments of 
bulbs from Japan were completely destroyed by this fungus. For 
an account of its life-history see the Kew Bulletin, 1897, p. 87. 
Piptocephalis, Van Tiegh. 
P. freseniana, De Boug. On dung. 
Circinella, Van Tiegh. 
C. umbellata, Van Tiegh. On cats’ dung. 
Helicostylum, Van Tiegh. 
H. piriforme, Bain. On mouse dung. 
SYNCEPHALIDEAE. 
Syncephalis, Van Tiegh. 
S. fasciculata, Van Tiegh. On wet and decaying vegetable 
matter. 
PERONOSPOREAE. 
Cystopus, Lév. 
C. candidus, Lév. On Capsella Bursa-pastoris, Cheiranthus 
Cheiri , Erysimum perofskianum, and Pringlea antiscorbutica. It 
has been found impossible to keep the last named plant in 
cultivation, owing to the attacks of this parasite,  . 
C. Tragopogonis, Schrét. Parastic on Tragopogon pratensis and 
Ipomoea. 
Phytophthora, De Bary. 
P. infestans, De Bary. Parastic on — pa p of the 
potato (Solanum tuberosum). This fung s the cause of 
the destructive scourge popularly called * polio idipians = heh 
unfortunately it is not the only fungous disease to which the 
potato is ta abject 
 Plasmopara, Schrat. 
P. pygmaea, Schrét. Parasitic on leaves = various Ranun- 
culaceous plants, Anemone, Aconitum, Isopyru 
P. nivea, Schröt. Parastic on leaves of species of Aegopodium 
and Conium. 
Bremia, Regel. 
B. Lactucae, Regel. Parasitic on leaves of Centaurea and 
ieracium. This fungus is often very destructive to garden 
lettuce, appearing on the Mrd) as a very delicate white film, 
