144 K. Miyake, Ooa tribut. to the Fertüiz. and Enibi-yogeay o£ Abies baisames. 



Fig. 31. An egg after the entrance of the pollen-tube contents, showing 

 the first sperm-nucleus approaching the egg-nucleus. Nucleus of tbe ventral 

 canal-cell and two other nuclei, probably representing second sperm- and tuba- 

 nuclei, are shown near tbe tip. X 90- 



Fig. 32. A slightly later stage, showing the sexual nuclei just before 

 Coming into contact. X 90. 



Fig. 33. Conjugation of the sexual nuclei. The second sperm-nucleus 

 is shown in the upper part of the egg. X 90- 



Fig. 34. Division of the fertilized nucleus. Nucleus of the ventral 

 canal-cell is found near the apex of the egg, below the disorgauizing neck- 

 ceUs. X 90. 



Fig. 35. Two segmentation-nuclei a little below the centre of fche egg, 

 Two extra nuclei are shown in the upper part. X 90. 



Fig. 36. Four segmentation nuclei. Several extra nuclei are found in 

 the upper portion of the egg, but are not sketched here, as they appear in 

 other sections. X 90. 



Figs. 38—40. Early stages in the formation of the proembryo. X 90. 



Fig. 41. Upper portion of an archegonium little before tbe entrance 

 of the pollen-tube contents. X 260. 



Fig. 42. Upper portion of an archegonium just after the entrance of 

 the pollen-tube contents. X 260. 



Fig. 43. A fertilized egg showing one nucleus and three nuclear 

 figures (a, b, c) in its upper part; the fertilized nucleus is in its second 

 division. (a). X 90. 



Fig. 43 a. The division of the second segmentation nucleus in Fig. 43 

 highly magnified, X '^30. 



Fig. 43b. Two connecting nuclear figures lettered as b in Fig. 43, 

 more highly magnified. X 530. 



Fig. 43 c. The figui-e lettered c in Fig. 43 more highly magnified X 530- 



Figs. 44 a — c. Figures occurring in the upper part of an archegonium 

 at an early stage of the second division following fertilization. 44 a probably 

 belongs to the second sperm-nucleus. X 530. 



Fig. 45. A fertilized egg in the process of second division, showing 

 two extra nuclei and oue nuclear figure (a) in the above. X 90. 



Fig. 45 a. A nuclear figure (a) in Fig. 45 more highly magnified. X530. 



Plate Vlir, 



Fig. 46. An archegonium showing the nuclear figm-es, representing a 

 possible case of double fertilization, two abortive nuclear figures (f. g.) are 

 found in the upper part. X 90. 



Figs. 46 a — e. Five consecutive sections of the mitotic figures showü 

 near the centre of the archegonium in Fig 46. X 530, 



Figs. 46 f — g. Two abortive nuclear figures in the upper part of the 

 archegonium shown in Fig. 46. X 530. 



