COXIFERALES 



91 



The third division immediately follows (Fig. 69, J"), divid- 

 ing the large antheridial cell into the primary spermatogenous 



L 



FIG. 69. Finns Laricio, showing a series from the formation of the tetrads to the de- 

 velopment of the pollen tube : p, vegetative cells ; .<?, stalk cell ; 5, body cell ; t, tube 

 nucleus : A and B, May 3d ; <7, May 10th ; D-G, May 20th ; H-J, May 25th ; K, 

 June 15th ; Z, May 1st (nearly a year after stage shown in K} ; x 600. 



cell or generative cell, and the tube cell (the so-called " vege- 

 tative cell") (Fig. 69, K). Until 1891, when Belajeff 30 dis- 



