The Pines of .\rsTR.\LiA. 



3S 



Flgare 4. — Longitudinal section through the end of a branchlet, showing 

 terminal leaves at their earliest stage of growth, 

 as ^>orophy)ls. C. caicarata, x 70. 







^^' 



Figure 6.— Transverse section u.: .„.. L.ul of 7 amentum, but at a 

 later stage than in Figure 5. Oil cavities are seen to be 

 numerous. C. rhomboidcaj x 32. 



Ficare 6.— Tran^vcrir section through base of Q am'-ntum, showing 

 rirrU- of oil caviti<-* around the m'-dian bundles of the 

 brarKhlrt, Mmilar bodir* being coniinu'-d into the inner 

 -»tr'Kt'ir'- of ih': ?.porophyll». C. rhomboidfa, x 15. 



Figure 7. -Transverse section through base of early cone, showing 

 attachment of four of the valves to the central axis 

 (branchiet). C. rhnmhoidca . x 17. 



Sections to illustrate the life iiistory and anatomy of the Cone Valves, 



