364 
Mottier. — On Certain Plastids, &c. 
Fig. 10. The smaller bodies have united to form the more mature protein masses. Each 
usually lies in a definite cavity, but all do not. The leucoplast-like bodies are only faintly visible. 
At x is an almost homogeneous substance which has Accumulated in the space left by a slight 
shrinkage of the cytoplasm. A similar substance sometimes accumulates in the cavity about the 
protein mass. This homogeneous substance represents probably the remaining oil. x 1,300. 
Fig. 11. Starch grains from the periphery of the endosperm, x 1,300. 
Figs. 12-18. Conopholis americana. 
Fig. 12. Epidermal cells from meristematic region. The small bodies in the cytoplasm are the 
primordia of plastids. x 1,300. 
Fig. 13. Meristematic cell deeper in the tissue. A number of globular protein granules are 
present, x 1,300. 
Figs. 14 and 15. Older cells in which the protein granules are much larger, x 1,300. 
Fig. 16. Portions of three older cells from the cortex of the stem. Starch grains are aggregated 
about the nucleus or elsewhere in the cells. The very numerous protein granules of different sizes 
stain a dense black with the iron-haematoxylin. x 875. 
Figs. 17 a, 17 b. Two large protein masses from an older scale leaf. 
Fig. 18. A section of a large protein mass in an adult cell. This body seems to be hollow, 
x 875. 
