42 



The Pines of Australia. 



Figure 13. — Transverse sections ihrnu^ih tin- uppi-r portion of eany cone 

 ck*ar of the central columtlla, and yet cross-cutting some 

 of the early seeds of the three larger sporophylls. The 

 dorsal oil cavities are prominent, whilst the black patches 

 in the tissue arc vascular bundles. C. calcarala, x 20. 



Flfiir* 14. — Sam*; a4Fit;urei3, butcut lower down and showing somewha 

 ier<;alcr detail of structure and more zygotei. C. calcaraia, X 20. 



Figurd 15. Transverse wction near thf lop of seed cavity, showing 

 alternate larKf-r and smaller valves and the row of oleo- 

 resin cells on the vntral and dorsal surfaces of the former. 

 Thetopsof thrtK; early seeds arc shown. C. calcarata, x 20. 



Sections to illustrate the life history and anatomy of the Cone Valves. 



