1894, ] The Evolution of the Hepatice. 355 
Hypenantrum; from forms allied to the latter we have on the 
one hand Cyathodium and Targionia with their sessile fruit, 
and on the other, Lunularia, Conocephalus and Marchantia, 
Primitive hepatic 
which justly may be regarded as the highest thalloid develop- 
ment that appears among the Hepatice. _ ses 
1. The ¥ungermaniales. The second line of differenti 
mong the Hepatice is in the direction of the vec 
°" @ leafy axis. From such thalloid forms as Aneura W! 
