Miyake, The development of the gametophytes etc. 25 



Fig. 109. Longitudinal section of a free nucleated prothallium, shortly 

 before wall-formation. From the same preparation as fig. 50. 



Fig. 110. Longitudinal section of upper part of a female prothallium, 

 showing young archegoniai oomplex; archegonial Chamber is not yet formed. 

 In Upper part of nucellar cap a pollen-tube with a dark body, probably the 

 body cell, is seen. 



Fig. 111. The same in a later stage; tip of a pollen-tube with body-cell 

 is found in archegonial Chamber. 



Fig. 112. Upper part of a mature egg, showing the egg-nucleus and a 

 part of the vacuole. 



Fig. 113. Conjugating sexual nuclei. 



Fig. 114. Spindle of first division of fertilized nucleus. 



