18 Britton and Taylor : Life History of Schizaea pusilla 



42. Upper part of same showing portion of spherical cell with the bladder-like 

 hyphae (b). A hypha in rhizoid, X x 95- 



43. Spherical cells filled with fungus a, X I 4°- 



Plate 3 



44. 45, 46 and 47. Different ways of branching of antheridial filament. 



48. One of the antheridial branches with antheridia in different stages of comple- 

 tion, a shows one filament giving rise to three, X 5°- 



49> 5°> 5 J > 5 2 > 53> 54> 55 and 5^- Stages in formation of the antheridium. Fig. 

 49, X 80, first cell sent out from main filament. Fig. 50, X 3°> l ater sta g e showing 

 first wall cut off near tip. Fig. 51, X 80, older stage. Terminal cell a becomes the 

 antheridium ; cell b the pedestal. Fig. 52, >< *40, 0, cap cell ; b, mother cells of the 

 antherozoids. Fig. 53, X I 4°> l ater stage. Fig. 54, X x 4°> rip e antheridium before 

 splitting cap-cell. Fig. 55, X 333/i> antherozoids still in membrane. Fig. 56, empty 

 antheridium. 



57. Branch showing antheridia and archegonia. All the antheridia but a are 



aborted, X *(>%• 



' 58. Young archegonia, X I 4°- 



59. Young archegonium, X 3°- a % canal cell ; b, ventral canal cell ; c, egg cell. 



60. Older stage of same before opening, X 80. 



61. Looking down on the four stigmatic cells of the archegonium, X 80. 



62. Archegonium opening, X 80. 



63. Showing large stigmatic cells (a) folding back, X 80. 



64. Cell of the filament dividing up before the formation of the archegonia, X I 4°- 



65. The same with an archegonium, X 3°- 



Plate 4 



66 and 67. Upper and under view of egg cell after fertilization enclosed in the 

 calyptra, X 3°- 



68. Young embryo, X 3°- 



69. a, gametophyte with archegonium. 6, foot; c> leaf; d, stem of sporophyte, 

 X30. 



70. Young sporophyte. a, fo3t ; b, leaf; c, stem; d, trichomes ; e y gland on 

 rond ; /, calyptra, X 8o - 



71. Young sporophyte. a y foot ; />, root ; c y frond ; d y calyptra. 



72 and 73. Two stages in the growth of the sporophyte showing curled tip of 



X"*. 



both, a, gametophyte ; b y sporophyte ; c y calyptra, 



74. a, Rhizome; />, root; c, first leaf ; d, trichomes. 



Plates 5, and 6 were drawn from a magnification twice that expressed in the num- 

 l>ers which represent the magnification of the figures as they stand in the reproduction. 



Plate 5 



form 



a, foot ; b, portion of calyptra ; c y root 5 d % young root, the dotted lines indicate root-cap 

 which can be seen through the vestigeral covering ; /, leaf; g y rhizome ; h, trichoma 

 which cover tip of young leaf and rhizome ; some have been removed to show glands 

 on leaf; /, gametophyte, X 45- 



76. Young root just emerging from its covering, X 8 7>£. 



