ie 
24 
increase, the remaining contents of the sporangium are by degrees 
pushed back towards the base. Whilst these phenomena are being 
an indistinct movement exhibited even thus early by some of the little 
rods, from which their destination may be anticipated. 
extent, and these conditions immediately precede the act of impregna- 
tion, which is effected in,the following manner :-— 
“The pressure within the sporangium, especially in the direction of 
the rostrum, om reate e : 
‘ a 
extruded portion becomes detached, and assumes the character of # 
rop of mucous, which remains lying near the opening of the sporal- 
