1897 | LIFE HISTORY OF LILIUM PHILADELPHICUM 451 
Fig. 21. Nucleus, showing twelve developing chromosomes. Delafield’s 
haematoxylin, erythrosin. X 1200. 
Fig. 21a. A single chromatin loop showing the double arrangement of 
the chromatin granules. x 2250. 
1G. 22. Section of nucleus with five chromosomes and a vacuolate 
nucleolus. Delafield’s haematoxylin, erythrosin. X 1200. 
Fic. 22a. Adjoining section of the same nucleus showing the remaining 
chromosomes, five of which are clustered around a nucleolus. 1200. 
Fig. 23. Section of a nucleus, showing seven chromosomes. The chro- 
matin loop is covered with a thick layer of material, which is stained a light 
purplish red, while the chromatin band itself is a very dark purple. Dela- 
field’s haematoxylin, erythrosin. > 1200. 
FIG. 23a. Adjoining section of the same nucleus, showing two nucleoli 
and five chromosomes. X 1200. 
Fig. 236. A single chromosome. X 2250. 
Fig. 24. Macrospore, showing twelve chromosomes and numerous micro- 
nucleoli in the surrounding cytoplasm. Delafield’s haematoxylin, erythrosin. 
X 1200. 
IG. 25. Macrospore with twelve chromosomes and numerous micro- 
nucleoli in the surrounding cytoplasm. A little later stage than fig. 2g. 
Delafield’s haematoxylin, erythrosin. 1200. 
FiG. 25a. A single chromosome stained a very dark purple with a homo- 
§S€neous appearance throughout. X 2250. 
FIG. 26. Macrospore with nucleus in the ‘mother star stage. Centro- 
Spheres at the poles of the spindle and numerous micronucleoli in the sur- 
roundifi cytoplasm. Anilin-safranin, gentian-violet. 1200. 
Fig. 27. Mother star showing the arrangement of the chromosomes on 
the spindle threads. Iron-alum, haematoxylin. X 1200. 
FiG. 28. Chromosome from mother star. C yanin, erythrosin. 2250. 
Fig. 29. Chromosome from mother star. Iron-alum, haematoxylin. x 2250. 
fae 30. Chromosome from mother star showing a darker central part 
Tresponding to the position of the chromatin — Anilin-safranin, gen- 
: aor. x 2250. 
Fig. 31. Chromosome from mother star. cue oe X 2250. 
Fig. 32. Chromosome.from mother star. Cyanin. X 2250. 
= 1G. 33. Chromosome from mother star, showing mode of division 
in-safranin, gentian-violet. 22 50. 
Fie. 34. Chromosome from mother star, showing mode of non 
See, gentian-violet. x a250 : : ee a 
