

1901] THE LIFE HISTORY OF ERYTHRONIUM 387 
Fic. 66. Beginning of second division, showing incept of dome-shaped 
spindle ; also beginning of the collection of central spindle material; anilin- 
safranin gentian-violet, iron-haematoxylin. L. +5 Z. 6 
Fic. 67. Upper nucleus of two-celled embryo-sac, showing incipient 
spindle; anilin-safranin gentian-violet, iron-haematoxylin. L. +5 Z. 6 
Fic. 68. Sectioa of two-celled embryo-sac showing two peculiar bodies 
probably formed from the remains of the central spindle ; anilin-safranin 
gentian-violet, iron-haematoxylin. L. jy Z. 6 
1G. 69. Chromosome from metakinesis stage of the second division show- 
ing longitudinal splitting ; anilin-safranin gentian-violet. L. yy Z. 12. 
Fig. 70. Upper spindle of second division showing the characteristic 
V-shaped daughter chromosomes; anilin-safranin gentian-violet. L. +g Z. 12. 
Fie. 71. Embryo sac showing the third division ; anilin-safranin gentian- 
violet. L. -Jy Z. 4. 
FIG. 72. Upper two spindles of the third division ; anilin-safranin gentian- 
viet. (Le ZA. 
Fig. 73. Mature but somewhat abnormal embryo sac; Delafield’s haema- 
toxylin-erythrosin. L. + Z. 4. 
FG. 74. Embryo sac with fertilized egg and dividing definitive nucleus; 
anilin-safranin gentian-violet. Z. 8 Z.12 
Fic. 75. Two-celled embryo. Z. 8 Z. 12. 
FIG. 76. Two-celled embryo and dividing endosperm ; pollen tube in the 
micropyle. Z. 8 Z. 4. 
FG. 77, Four-celled embryo; pollen tube above. Z. 8 Z, 12. 
Fic. 78. Four-celled embryo. °Z2. 3 2.12, 
IG. 79. Section of five-celled embryo ; two cells in upper tier and three 
Fig. 80. Six-celled embryo. Z. 8 Z. 12. 
Fig. 81. Six-celled embryo ; two cells in the lowest tier cut away. Z. 8 
i2. 
Fig. 82. Section of twelve to fifteen-celled embryo. Z.8 Z. 12. 
FIG. 83. Section of about twelve-celled embryo, showing marked differ- 
€nce in staining reaction between the upper and lower cells. Z. a Ae © 
ie 84. Embryo considerably advanced, showing the large suspensor. 
Z.8 Z. 12. . 
Fig. 85. Restored embryo showing much lobed suspensor about the same 
age as the preceding embryo. Z, 8 Z. 12. : i 
Fic. 86. Daughter star from endosperm showing sharp pointed spindle 
ending in a centrosome; anilin-safranin gentian-violet, iron-haematoxylin ; 
£. Americanum. UL, yy Z. 12. 
Fic. $7: Section of advanced embryo showing lobed suspensor, Z.3 2,12, 
BIG. 88. Sectian of embryo somewhat older than the preceding, showing 
the massive suspensor; remains of pollen tube in the micropyle. Z. 8 Z. 12. 
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