Fig. 14. Development of the Archegonium in PtUaviemi* 



X JOO. 



^ections. 



D. A somewhat ol the cap-cell, r. is still undivided. 



. Cross-section of the apex of a somewhat older stage ; the divisions are 



F. Cross-section of a very young archegonium. 



tage. 

 // Apex of a still older archegonium. showing a certain amount of apical growth. 



/-/-. 



stages, v, ventral canal-cell ; a. egg -cell. 



