412 



Transactions. 



Figs. 69a-69c. — A very young attached prothallial plantlet in longitudinal section, 



showing three apices of growth, two of winch possessed conducting-strands. 



Sections B and C are respectively the tenth and fifteenth from A. X 47. 

 Figs. 70a-70f. — -A young prothallial plantlet in six transverse sections taken at 



different points from the apex downwards to the foot. A to D X 100 ; 



E and F x 80. 



