/^ 



^J ^^ 







d 





< ■ o 



7., 









I 



Fig. 266. Some anatomical details of the prothalli oWphioglossum vulgatum L., from sections, a. A recently 

 impregnated archegonium with two spermatozoids in contact with the egg (somewhat shrunk on 

 fixing). X200. b. Immature unopened archegonium. x 400. c. Part of a transverse section 

 with two antheridia, the upper one empty, the lower containing young spermatozoids. The 

 dehiscence cell appears dark in both, x 200. d. The same with spermatozoids emerging, x 200. 

 e. A complete transverse section through the fertile region off, showing various stages of antheridia. 

 x 100. /. The same, showing the archegonium of Fig. 265a (pointing downwards), x 100. 



267 



