114 BOTANIUAL GAZETTE [avcust 
The dorsal growth of the receptacle is excessive, while the 
ventral growth is limited to a few layers of cells. Consequently 
the apical cells (a, fig. 3) lie very close to the stalk. The 
lacune or airchambers are for the most part confined toa single 
layer. They are extremely large, however, and are separated 
FiG. 3.—a, longitudinal section of sporogonial receptacle; % apical ‘a 
stoma. X 80. 4, c, longitudinal section of stoma. X 600. 4, transverse 5° 
receptacle; /, furrow of peduncle. X 80 
from one another by a single row of cells. -Each ait oe 
iS connected with the exterior by means of well-dev" 
stomata. These peculiar breathing pores are present 19 
