402 Stopes and Kershaw.—Anatomy of Cretaceous Pine Leaves. 
DESCRIPTION OF PLATES XXVII AND XXVIII. 
Illustrating the Paper by Dr. Stopes and Miss Kershaw on the Anatomy of Cretaceous 
Pine Leaves. 
PLATE XXVII. 
Phot. i. Prepinus japonicus. Photograph of transverse section of the leaf, showing its five 
sides and general anatomy. scl., hypodermal sclerenchyma. g., resin-canals, two in number. /., 
transfusion tissue round the bundle. 
Phot. 2. Prepinus japonicus. High power photograph of part of the leaf to show (si.) stomata 
lying between the groups of sclerenchyma (sc/.), t., transfusion tissue. 
Phot. 3. Pinus yezoensis . Photograph of a transverse section of the leaf, showing its oval 
outline and general anatomy. 
Phot. 4. Pinus yezoensis. Enlarged view of part of the leaf, h., hypodermic sclerenchyma. 
a., assimilating cells, with infolded cells, en., endodermis. ph., phloem, x., xylem ; note the large 
ray cells between the rows of tracheides. 
Phot. 5. Part of the edge of the leaf enlarged to show the resin-canal (g) lying at the edge 
below the hypoderm cells (h.). ep ., epithelial cells of resin-canal, a., assimilating cells with 
infolded edges. 
PLATE XXVIII. 
Fig. 1. Prepinus japonicus. Drawing of detail of leaf, sc!., sclerenchyma patches, st., stomates. 
g, resin-canal, c.a., crushed assimilating tissue, z '.sc., sclerized sheath of vascular strand, t., trans¬ 
fusion zone. 
Fig. 2. Pinus yezoensis. Drawing of detail of leaf, a., assimilating cells, en., endodermis 
x., xylem. m., medullary ray cells, ph., phloem. 
