1 14 Blackman and Welsford. — Fertilization in Lilium. 
Fig. 2. a and b. L. Martagon ; c, L. auratum. Male nuclei of various shapes in contact with 
polar nuclei. The contrast between the ‘ active ’ chromatin of the male nuclei and the ‘ passive ’ 
chromatin of the polar nuclei is very striking, x 1,260. 
Fig. 3. L. Martagon. Later stage of union of male and polar nuclei ; the male nucleus has 
shortened and thickened and has lost its vermiform appearance, x 1,260. 
Fig. 4. L. Martagon. Male nucleus in contact with egg at a later stage than that shown in 
Fig. i. The chromatin of the female nucleus now shows a spireme like that of the male, x 1,720. 
Fig. 5. L. auratum. Very early stage of entry of male nuclei into the embryo-sac. The main 
mass of the material round the nuclei apparently represents the contents of the pollen-tube which has 
only very recently destroyed the synergid. Even at this early stage there is a distinct difference in size 
between the two nuclei. The two deeply staining bodies represent the X-bodies of Nawaschin. 
X 1,100. 
Fig. 6. L. auratum. A slightly later stage than that of Fig. 5. It shows the remains of the 
contents of the pollen-tube, with the X-bodies, the two male nuclei, and the egg-cell with the nucleus 
of the undestroyed synergid above it. x 1,100. 
