96 LINNEAN SOCIETY OF LONDON. 
and hydrocyanic acid: the first three cause a very temporary effect, 
whereas prussic acid has a prolonged action; (4) the following re- 
lind 
granular protoplasm; this tissue he terms ‘“prophloém.” On 
tracing the prosylem downwards, it is found that it gradually 
encroaches in the other tissues by the ‘‘foot,’ until it takes on the 
character of conducting tissue. The stomata on the theca are con- 
fined to the hypophysis; the form of stomata in which the guard- 
Funaria. In g sporagonium five distinct meristems occur 
with different laws of cell-division; one form with an axial solid 
cylinder he terms “ endomeristem.’ gives rise to the central 
is itself derived from the endomeristem. The ypophysis is an 
absorbing and assimilating organ, and performs all the functions of 
a leaf, and should be classed as a hyllome. The water-conducting 
wanting also in some vasculares, e. g., Selaginella. The author 
compares the development of the sporagonium in some respects to 
iti >; an draws the conclusion that the 
