316 The Cultivation of the Fungi. 
precedes the formation of the ascus. All the results of the 
investigations which have been carried out by various observers in 
recent years, and which show that, in addition to the karyogamy, a 
sexual process, either functional or reduced, still exists in several 
of the Ascomycetes, are regarded by him as erroneous and largely 
due to preconceived ideas. 
It would unduly prolong the length of this notice to enter into 
a discussion on this matter, especially as the facts bearing on the 
question of the sexuality of the Ascomycetes have been reviewed 
on several occasions by those who have also themselves contributed 
important researches on the subject. 
It is satisfactory to note that this veteran mycologist does not 
regard the present volume as the conclusion of his labours and we 
are promised at least two more volumes containing the results of 
further important researches, which will be awaited with much 
interest. 
A.W.B. 
R. Mauley, Printer, 151, Whitfield Street, Fitzroy Square, W. 
