The Pines of Australia. 



Figure 24.— Longitudinal section through the seed cavity ol an early 

 cone. One full-sized, fertilised ovule is seen in the centra 

 of the picture, having on its left the columella, the interior 

 of which is one large oleo-resin cavity, and on the left of 

 this again is a wing in section of another of the fertilised 

 ovules, followed by others on the left wall. Oil cavities 

 are numerous on the walls of the macrosporophylls forming 

 the dome. Stained with haematoxylin, C. rhomboidea, x 20. 



