113 



C. p. rr. Copulation products 



juat surrounding themselves with a 

 denser protoplasm. 



N. F. P. = Nuclei of fertil part. 



R. P. 0. F. P. =: Retarded prothal- 

 liumcells of fertil part. 



P. C. 0. S. P. zz: prothalliumcells of 

 steril part. 



PLATE VIII. 



Fig. 46. Fertilised embryosac. X 100, 



Z. = Zygotes concrescent 



with the top of the pollentube. 



N. 0. F. P. := Nuclei of fertil part. 



Fig. 47. Upper part of preceeding 6gure 



after isolation and after dissolving 



of contents by means of chloral 



hydrate. X 250. 



P. = Pollentube, with the thin 

 end outside of the embryosac. 



1.1.:= limits of the hole made in 

 the wall of the embryosac by the 

 pollentube. 



Z. =1 Zygotes concrescent with 

 the top of the pollentube. 

 Fig. 48. Fertilised embryosac. X ^00. 



R. E. izz 4 embryosacs. two larger 

 and two smaller ones, all lying in pla- 

 nes above that of the adult em Oryosac. 



P. z= Pollentube. 

 Z'. z= Zygote concrescent with 

 the top of the pollentube. 



Z2. z= Zygote concrescent with 

 zygote Z'. 



Fig. 49. Two zygotes concrescent with 

 top of pollentube. X 425. 



Fig. 50. Free zygote, allready sprouted, 

 forming a branching proembryonal 

 tube. X 600. 



Fig. 51. Older embryosac. X 50. Sprou- 

 ting zygote with two sprouting tubes, 

 penetrating by mistake in the nucel- 

 lar tissue. 



Fig. 52. Embryosac. X 50. Sprouting zy- 

 gote. Tube taking the right direc- 

 tion, towards the top of the pro- 

 thallium. 



PLATE IX. 



Fig. 53. Embryosac. X 75. 



P. = Pollentube. 



R. P. C. of F. P. = Retarded pro- 

 thalliumcells of fertil part. 



Z. 3Z Zygotes, the one 



having sprouted, its nucleus is now 

 situated at the tip of the proembryo, 

 which tip just pushed in between 

 the steril prothallium and the wall 

 of the embryosac. 



Fig 54. Embryosac. X 50. Isolated. The 

 curve is artificial , caused after isola- 

 tion. The longitudinal axis of the pro- 

 thallium ought to be in one straight 

 line with the longitudinal axis of the 

 fertil part of the Embryosac. 

 S. Pr. cr steril prothallium. 

 R. Ar. :rr Rudiment of Archegonium. 



Fig. 55. Upper part of embryosac of 

 fig. 54. X 320. Letters as in fig. 54. 



PLATE X. 



Fig. 56. Rudiment of Archegonium of 



fig. 55. X 850. 

 Fig. 57. Embryosac. X 200. 



R. E. rz: Reduced Embryosac. 



P. T. 0. Z. =r Proembryonic tube of 

 zygote which was lying in another 

 section of the same sac. 



The unusual case of a septum in 

 Ann. Jaril. Buitenz. 2 Ser. Vol. I. 



a proembryonic tube while yet in 

 the fertil part of the embryosac here 

 occurs. 



= Zygote. 



:zr sprouting zygote. 



=: male generative nu- 



Z. 



s. z. 



G.N. 

 cleus. 

 T.P. 



=: Top of prothallium. 



8 



