124 



Plate I. 



DESCRIPTION OF THE PLATE. 



Flg.l. Upper surf ace of soaked tea-leaf . Upper part 

 by ^-Inch, lower by 1-inch objective ; o, an empty cell. 



Fig. 2. Under surface, by 1-inch objective. 



Figr. 3. Cuticle of upper surface, by. U-lnch objec- 

 tive ; a, scales of cuticle : b, parenchymal cells adhei* 

 in(r to the under side of the cuticle. 



Fig. i. Under side of upper cuMcle, by ]4-incb ob- 

 jective ; a. scales adhering to cuticle. 



Fig. 5. Detached hairs, dry, by 1-incli objective. 



Fig. 6. Parenchymal cells and spiral fistue, by H- 

 Inch objective. 



Fig. 7. A hair of the under surface of a tea-leaf, by 

 }<-inch objective. 



Fig. 8. Section of a tea-leaf, by 1-lnch objective. 



Fig. 9. Cuticle of under surface of a tea-leaf, by ]4- 

 Inch objective ; a, 6, stomata openings in the hyaline 

 cuticle ; e, remains of cell-walls adhering to cuticle ; 

 d, parenchymal cells adhering ; e, cells overlying 

 stomata. 



Fig. 10. Cells of cuticle on the large veins of the 

 leaf ; a, from under surface ; ft, from upper surface. 



Figures 6,7 and 9 drawn with camera lucida ; the 

 scale given applies only to these three figures, and is 

 in decunals of an inch. 



