190 



COMPENDIUM OF GENERAL BOTANY. 



FIG. 111. Sexual organs of 

 Vaucheria sessilis. 



Off, Oogonium ; a, antheridium. 

 (After Sachs.) 



FIG. 110. Various stages in the conjugation 

 of Spirogyra longata. 

 (X 550.) (After Sachs.) 



Fig. 112. A, Rupturing anther- 

 idium of Funariahygrometrica 

 (moss); B, magnified spermato- 

 zoid in the mother-cell ; c, free 

 spermatozoid of Potytrichum. 

 (After Sachs.) 



