132 BOTANICAL GAZETTE [ FEBRUARY 
Fic. 73. S. integrifolium, Quadrant stage, by longitudinal and a trans- 
verse division. 
1G. 74. S. integrifolium. Octant stage; cell c with one longitudinal 
wall. 
In each of the above figures the entire embryo has been drawn. The 
succeeding figures represent median sections. 
FiG. 75. S. integrifolium. One octant divided by anticlinal wall; three 
cells in suspensor, by transverse division of vesicular cell of Tie 73. 
Fic. 76. S. integrifolium. Dermatogen cut off by periclinal in one octant, 
anticlinal wall in other upper octant; two remaining upper octants, not 
drawn, are like the latter. 
PLATE IX 
All figures magnified 1375 diameters. Fig. 82, S. terebinthinaceum ; other 
figures, S. integrifolium. : 
Fic. 77. Anticlinal walls in “upper octants; lower octants undivided; 
longitudinal wall in ¢, 
Fic. 78. Second division, periclinal, in one upper octant; dermatogen 
cut off in lower octants, also in cell c; intersecting walls in cell below ¢. 
FIG. 79. Periblem and plerome separated in left lower octant; plate of 
four cells from cell c. 
Fig. 80. Order of divisions in upper octants hard to determine. Derma- 
togen, periblem, and plerome distinct in lower octants. 
Fic. 81. Periclinal followed by anticlinal in left upper octant; in the 
right anticlinal precedes periclinals, : 
1G. 82. Cells of lower octants elongated, and beginning to form two tiers ; 
inner cells of tier c greatly enlarged. 
F1G. 83. Divisions in upper octants quite regular; cells of lower octants 
dividing transversely ; periblem and plerome partly separated in tier ¢. 
Fic. 84. Two tiers in lower octants nearly completed. 
Fic. 85. Two completed tiers of cells in lower octants. eee 
Fic. 86. Plerome cells of lower octants commencing to divide longitudi- 
nally ; spindle indicates division of inner cells of c into periblem and ple- 
rome ; oblique wall in 4 nschlusszelle, S. 
PLATE x 
figs. 88-91, magnified 1 375 diameters ; fig. 92, magnified 890 diameters. 
Fic. 88. SS. integrifolium. In the cell below c, three dermatogen-term!- 
nals (@. s.) and a periblem-terminal (#. s.) have been formed by the intersec- 
tion of three oblique walls oar 
FIG. 89. S. integrifolium. Dermatogen, periblem, and plerome distinct : 
tier c; periblem-terminal divided by two intersecting longitudinal walls; 
entire embryo outlined in Jig. 89, a. 
