124 Marshall Ward . — On the Characters , 
media which they are more especially concerned with. They 
do not care, and naturally so, what vagaries the organism 
exhibits, so long as they can recognise it when they meet 
with it. 
As matter of experience, however, it is just these vagaries 
that bring about the sources of error which beset them on all 
hands, and hence they are equally interested with the botanist 
in having them cleared up, and explained. 
It must not be overlooked, moreover, that many of them 
are alive to the dangers referred to, as witness Cassededebat’s 
industrious and able investigation of the differences between 
the true typhoid bacillus, and the various false ones which 
simulate it : also the numerous researches which have been 
made on the distinguishing characters between Bacilhis sub tills 
and B. anthracis , and so on. 
Whence we come to the conclusion that, whatever may be 
believed to the contrary, the real interests of ‘ bacteriologists ’ 
of all kinds are identical. Exactly the same kind of discus- 
sions, and apparent difference of interests, arise in the relations 
of Forestry, Agriculture, Horticulture, &c., to Botany; but in 
these cases also the broadest thinkers all recognise the true 
state of affairs. 
At the same time, botanists must concede that the big 
special problem of working out these life-histories, and of 
compiling the ideal classification, still a long way ahead of us, 
devolves upon themselves. It is useless to merely criticise 
the imperfect tabular classifications of the pathologists and 
hygienists and others : the only thing to do is to take the 
organisms in hand and expose their vagaries by cultivating 
them under the microscope, and subjecting them to the tests 
devised by modern morphologists and physiologists. 
The most recent and the most thorough classification of 
the Schizomycetes extant, is that of De-Toni and Trevisan, 
published in 1889 in Saccardo’s ‘ Sylloge Fungorum.’ It 
embraces the description of more than 650 species, and may 
be taken as the most complete account of the Schizomycetes, 
from the systematists’ point of view, that has ever been. 
