748 
DUNCAN S. JOHNSON 
EXPLANATION OE FIIURES 
64 Part of longitudinal section of seed, showing one-celled embryo, free endo- 
sperm nuclei, antipodals, tapetum, inner integument and part of the perisperm. 
X 75. 
65 Transverse section of spike, showing number and arrangement of ripe fruits. 
X 10. 
66 Longitudinal section of a mature fruit, showing structure of fruit and seed. 
X 40. 
67 Part of transverse section of mature fruit. X 40. 
68 Partof longitudinal section of inner integument, showing structure. X 350. 
69 Longitudinal section of a half-grown embryo. X 350. 
70 Similar section of mature embryo. X 350. 
71 Part of longitudinal section of ripe seed, showing perisperm and per- 
sistent antipodal mass. X 170. 
