FRUCTIFICATION OF MOSSES. 

 Fig. 183. 



373 



Antheridia and Antherozoids of Polytrichum commune :— a, 

 group of Antheridia, mingled with hairs and sterile filaments 

 (paraphyses) : of the three Antheridia, the central one is in the 

 act of discharging its contents ; that on the left is not yet ma- 

 ture ; while that on the right has already emptied itself, so that 

 the cellular structure of its walls becomes apparent ;— b, cellular 

 contents of an Antheridium, previously to the development of 

 the Antherozoids ;— c, the same, showing the first appearance of 

 the Antherozoids;— d, the same, mature and discharging the 

 Antherozoids. 



