AMERICAN JOURNAL OF BOTANY 
[Vol. io, 
166 
Fig. 36. Axial row consisting of egg, ventral canal cell, one binucleate neck-canal 
cell, and two penultimate neck-canal cells in process of division; egg and ventral canal cell 
disintegrating; reconstructed from three serial sections. X 375. 
Fig. 37. Mature axial row with three binucleate neck-canal cells, all markedly 
shrunken; egg and ventral canal cell badly disorganized. X 375. 
Fig. 38. Archegonium with two eggs, two ventral canal cells, and one neck-canal 
row; reconstructed from three serial sections. X 375. 
Plate XIX 
Fig. 39. Longitudinal section of archegonium showing egg in early stage of disintegra¬ 
tion due to failure to be fertilized. X 375. 
Fig. 40. Archegonium showing late stage of disintegration; no protoplasm visible 
in cells of wall but nucleus of egg still recognizable. X 375. 
Fig. 41. Oblique section of archegonium and two-celled degenerating embryo; no 
protoplasm in cells of archegonial wall. X 375. 
Figs. 42-46. Premature disintegration of egg and ventral canal cell; figure 45 re¬ 
constructed from two sections. X 375. 
Figs. 47-50. Transverse sections of a mature archegonium; figure 47, third serial 
section from terminal end; figure 48, sixth serial section; figure 49, ninth serial section, 
just above the venter; figure 50, twelfth serial section, through venter and egg. X 200. 
