clii Proceedings of the Asiatic Society of Bengal. [N.S., XV, 
Section of Pure Botany. 
President—S. R. Kasuyap, Esq., M.Sc., B.A. 
Presidential Address. 
THE RELATIONSHIPS OF LIVERWORTS ESPECIALLY IN 
THE LIGHT OF SOME RECENTLY DISCOVERED 
HIMALAYAN Forms. 
The new light thrown on the general trend of evolution in 
the Liverworts by my investigations of the Himalayan forms 
signed to this group in a scheme of evolution of the Vegetable 
Kingdom have induced me to select this subject for my address 
r 
hypothetical forms have been assumed to bridge these gaps. 
but it must be said, so far without any success 
e evidence in tracing relationships is derived chiefly 
from the comparative morphology of living and extinct plants 
and it is supplemented to some extent by facts supplied by the 
study of development. If we could find a gradually ascending 
