LIBOCEDRUS: see Fig. 42 F, p. 26. 



MACROZAMIA: 



29 



Ik] 



d^ 



Fig. 46. Macrozamia spiralis; a, transverse, equatorial view (optical cross- 

 section); b, distal face; c, exine stratification at amb at right angles to central 

 part of the sulcoid tenuitas; d, pattern caused by endosexinous rods (phase 

 contrast); e-g, morphological variants, a, b x 1000, c x 2000, e-g x 250. 



METASEQUOIA:— 



Fig. 47. Metasequoia glyptostroboides; lateral view (x 1000) and exine strati- 

 fication (X 2000). 



