9 



ARAUCARIA:— 









Fig. 7. Araucarid luontaim (exine stratification), a, transition from tenuitas 

 (left) to the thickwalled rest of the grain (right). Layers interpreted in the 

 same way as in b. — b and c, exine stratification outside tenuitas (alternative 

 interpretations); c, shows a thin "nexine" (possibly consisting of two layers) 

 overlain with a thick "sexine" exhibiting three layers: an "endosexinous" 

 faintly-marked layer (consisting of baculoid rods?) merging into a thick, 

 ± granular "ectosexine" ("tegillum"), beset with piloid "suprategillar" 

 processes. According to the interpretation given in b, thin "sexine" 

 ("pila") covers a thick "nexine" (the rest of the exine). — d, LO-patterns 



("pila"). X 2000. 



ARCEUTHOS: see Fig. 42 B, p. 26. 



ATHROTAXIS:— 







\'' 



Fig. 8. Athrotaxis cupressoides. From left to right: exine stratification (x2000); 

 lateral view of opened grain (x 1000); LO-patterns. 



AUSTROTAXUS:— 



. . _.. -r^-j- o-»^f jS?>S« v/ 









Fig. 9. Austrotaxus spicata. Main figure: surface and optical cross-section 

 (X 1000). Details: exine stratification (x 2000) and LO-patterns. 



