1898] ORIENTATION OF THE PLANT EGG 315 
which has the power of principal development, and it is there- 
fore this hemisphere which must be regarded as epibasal. The 
hemisphere toward the archegone neck 
forms the well-known suspensor-cell, and 
s clearly the homologue of the foot in 
mosses, liverworts, equisetums, and ferns. 
The first root in Lycopodium and Selag- B 
nella together with a nursing organ, mis- 
tamed the ‘‘foot,’’ arise adventitiously 
from the epibasal hemisphere. As com- 
jared, then, with Equisetum the egg of 
——— 
Fic. 10.—Embryo of 
Lycopodium must be regarded as having Lycopodium. 
wdergone rotation through an angle of 
i$", bringing the primitive hemispheres into a position just the 
reverse of their original one. 
al proximally. 
on the ventral 
