1915] BURLINGAME—ARAUCARIA BRASILIENSIS 39 
Fic. 45.—Cortical cells from the embryo filled with small round starch 
grains and large proteid globules; x 250. 
Fic. 46.—A single cell from the middle region of the endosperm adjacent 
to the embryo, showing the large oval starch grains and the tiny round proteid 
globules; the light lines mark the position of the delicate walls which do not 
show in the photograph owing to their not having been stained; X 250. 
1G. 47.—Section through the integument, showing the three layers; the 
central irregular cells later become woody to form the firm brown testa of the 
mature seed. 
Fic. 48.—Longitudinal section of a seed that had been kept for over a 
year in a tin box in laboratory; it shows how growth of the embryo continues 
after the fall of the seed, even under comparatively unfavorable conditions : 
natural size. 
