101 



Fig. 80. Ripe sperm-cell of G, polypo- 

 dioides, 950 X* 



Fig. 81. Apical view of the antlieridium 

 of G. pohjpodiuides, 275 X- 



Fig. 82. Longitudinal section of young 

 antlieridium of G. dicholoma, 275 X- 



Fig. 83. Similar section of a nearly ripe 

 antlieridium, 275 X. 



Fig. 84. Tiansverse section of ripe an- 

 tlieridium of G. dichotoma, 275 X- 



Fig. 85. Apical view of young antlieri- 

 dium of the same, 275 X« 



Figs. 86 — 87. Surface views of old anthe- 

 ridia of G. dichotoma, 275 X- 



Fig. 88. Two sections of small, ripe an- 

 theridium of the same, showing the 

 dehiscence, x275. 



Fig. 89. Longitudinal section of a full- 

 grown antheridium of G. laevigata, 



Fig. 90. Three sections of a small, but 

 nearly mature, antheridium of the 

 same species, 275 X- 



PLATE XIL 



Fig. 91. Two sections of a full-grown 

 antheridium of G. laevigata; b shows 



part of the surface-cells; 275 



/\- 



Figs. 92—93. Sections of large antlieridia 

 of G. laevigata showing rudimentary 

 antlieridia, an^; o, the opercular cell. 



Fig. 94. Longitudinal section of prothal- 

 lium-apex of G. peciinata, showing 

 a young archegonium, 275 X- 



Fig. 95. Horizontal section of the pro- 

 thallium-apex of the same species, 

 showing the position of thearchegonia, 

 -?, 275 X- 



Figs. 96 — 100. Successive stages in the 

 development of the archegonium of 

 G. peclinala; longitudinal sections; 



480 X; &, h'd^A\ cell; o, egg; y. c, 

 ventral canal-cell; n. c, neck-canal- 

 cell; 480 X- 



Fig. 101. An archegonium of G. pcclinala 

 in which no division wall was present 

 in the neck canal cell; 275 X- 



Fig. 102. Longitudinal section of the 

 prothallium-apex of G. peclinala, 

 showing a mature archegonium; the 

 two neck-canal-cells are conspicuous; 



275 X- 

 Fig. 103. An open archegonium of the 

 same species that has just been fer- 

 tilized, 275 X; several spermatozoids, 

 sp., are visible above the egg, and 

 one has penetrated the egg nucleus. 



PLATE XIIL 



Fig. 104. Two young archegonia of G. 



dicholoma, 480 X- 

 Fig. 105. Section of a young archegonium 



of the same species in which the 



primary neck-canal-cell has been cut 



off; 275 X- 

 Fig. 106. Longitudinal section of a mature 



archegonium of G. dichotoma, 275 X; 



a very young one, 9, lies close to it. 

 Fig. 107. Prothallium-apex and young 



chegonium of G. polypodioidcs, 275 



V- 



h, glandular hair. 



Fig. 108. Section of a mature archego- 

 nium of G. poly pod ioides, 275 X- 



Fig. 109. Young archegonium of G. laevi- 

 gata, 275 X- 



Fig. 110. Mature archegonium of G. laevi- 

 gata, 275 X- 



Fig. 111. Horizontal section of the pro- 

 thallium of G. pectinala, transversing 



an archegonium containing a young 

 embryo, 275 X- 



Fig. 112. Three sections of the embryo 

 shown in Fig. HI; a, is the section 

 nearest the archegonium neck; the 

 Qthers are near the median plane of 

 the embryo; r, root initial; L, coty- 

 ledon; st, .stem; F, foot; 275 X- 



Figs. 113 — 114. Two nearly vertical sec- 

 tions of a very young (probably four- 

 celled) embryo of G. dicholoma ; 275X- 



Fig. 115. Two transverse sections of a 

 somewhat older embryo of the same 

 species; the median portion of this 

 embryo had been injured in some 

 way and no satisfactory sections could 

 be made. 



Figs. 116 — 118. Three longitudinal sec- 

 tions of an oldei" embryo of G. dicho- 

 toma; 275 X ; lettering as in Fig. 112. 



