334 
ILLUSTRATIONS. 
Plate V. 
VARIOUS FORMS OF STONE CELLS. 
Fig. 31. — From bark of Quercus alba. 
Fig. 32. — From bark of Canella alba. 
Fig. 33. — From seed-coat of capsicum. 
Fig. 34. — Epidermis of hyoscyamus seeds. 
Fig. 35. — From pericarp of pimenta, containing brownish tannin 
masses. 
Fig. 36. — From seed-coat of coffee. 
Fig. 37. — From seed-coat of almond. 
Fig. 38. — Transverse section through stone cells of seed-coat of 
sinapis alba. 
Fig. 39. — Surface view of stone cells of seed-coat of sinapis alba. 
Fig. 40. — Transverse section through stone cells of endocarp of 
olive, the lumen containing air. 
Fig. 41.— Transverse section through a stone cell in the periderm 
of calumba, the cell containing numerous monoclinic 
prisms of calcium oxalate. 
Fig. 42. — Various forms of stone cells isolated from pericarp of 
illinium. 
