io8 



THE LIVING CYCADS 



Fig. 55. — Slangcria paradoxa: nucellus of ov'ule with pollen lubes, 

 in three of which the two sperms are shown. Highly magnified. 



Fic.s. 56-57. — Diooii cdiilc: two stages in the (U'velopmoiit of the 

 pollen tube and bod)' cell: Fig. 56, December condition, body cell 

 elongated and the blepharoplasts arranged in the long axis of the tube; 

 Fig. 57, several months later, the blepharoplasts having rotated until 

 they are transverse to the long axis of the tube. In l)oth figures the 

 outer spore coat of the jx)llen grain is easily seen; the inner spore coat 

 has dcvclojx'd into the pollen tube. Highly magnified. 



