46 



The Pines of Australia. 



Figure 8. — TrnnsYcr>*:' w:-ciion (portion of) through base of Q amentum, 

 showing oil cavities near the as<imilatory surface; the 

 dark patches in the macrosporophyli texture are vascular 

 bundles. C. rhomboidea, x 32. 



Figure 10. — Transverse section through middle of young cone. Two 

 large and two small valves are perfectly sectioned. C. 

 rhomboideay x 19. 



\ 



Flfot* 9.— Tran«v<i»e uclinn Ihrouxh bast o( young 9 amentum, 

 fthowinff attachment to medi.m ImuxIIi-^ by ibc three larger 

 valves. C. rhomboidea, x i . 



Figure Jl. — Transverse 'ection through the uppiT portion ol a very 

 youny cone, the alternate large and <mall valves can be 

 idr.'ntified, as well as the preponderance of oil cavities in 

 the former. C. calcarata, x 20. 



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



