Ill 



THE JUN GERM ANN I ALES 



B 



FIG. 42. A, Vertical, B, C, horizontal sections through the apex of Pallavicinia 

 cylindrical .v, apical cell, A, X225; B, C, X45o; I), E, Pellia epiphylla; D, ver- 

 tical section; E, horizontal (optical) section, X45Q. 



