30 e ANNÉE 
AVRIL 1916 
N° 4 
ANNALES 
DE 
L’INSTITUT PASTEUR 
Mémoire publié à l’occasion du jubilé de E. Metchnikoff. 
THE PLURALITY OF SPECIES OF 
THE SO-CALLED 
“ THRUSH-FUNGUS ” 
(CHAMPIGNON DU MUGUET) OF TEMPERATE CLIMATES 
by ALDO CASTELLANI M. D. 
Director Clinic for Tropical Diseases, Colombo (Ceylon). 
In previous publications I hâve, I think I may venture lo 
say, succeeded in demonstrating the plurality of species in the 
tropics (Ceylon and Southern India) ofthe so-called « Thrush » 
fungus, viz. tliat the hyphomycete generally knovvn by the 
terni of oidium or saccharomyces , or monilia albicans, does not 
represent in the Tropics mereïy one species, but that the terni 
covers a large number of different species of fungi, that infact 
sonie of lhese fungi probably belong to different généra. 
While on leave in Europe in 1913,1 thought it might perhaps 
be of inlerest to investigate whelher the same conclusion coidd 
be corne to in temporate zones ; and thanks to the kindness of 
prof. M artin I was able to carry out sonie work on the subject 
at the Lister Inslitule of London. It was not difficult to 
foresee that similar conclusions would probably be obtained, 
considering (lie wideiy different descriptions which the various 
il 
