220 Jeffrey . — On the Structure of the Leaf in Cretaceous Pines . 
PLATE XIV. 
Fig. 16. Leaf probably of Cordaites principalis . x 180. 
Fig. 17. Leaf-fascicle of Pinus tetraphylla. x 32. 
Fig. 18. Leaf of Pinus spc. x 40. 
Fig. 19. Leaf of Pinus spc. x 40. 
Fig. 20. Leaf of Pinus spc. x 40. 
Fig. 21. Leaf of the same in longitudinal section of bundle. 
Fig. 22. Leaf of Pinus spc. x 40. 
Fig. 23. Leaf of Pinus spc. x 40. 
Fig. 24. Leaf of Pinus spc. x 33. 
x 180. 
