18 Bkitton and Taylor : Life History of Schizaea pusilla 



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

 hyphae (i). A hypha in rhizoid, >; 195- 



43. Spherical cells filled with fungus a, X I40- 



Pl.ATIC 3 



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



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

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



49, 50, 51, 52, 53, 54, 55 and 56. Stages in formation of the antheridium. Fig. 

 49, X 8o> first cell sent out from main filament. Fig. 50, X 30, later stage showing 

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

 antheridium ; cell d the pedestal. Fig. 52, >< 140, <?, cap cell ; d, mother cells of the 

 antherozoids. Fig. 53, X 140, later stage. Fig. 54, X 140, ripe antheridium before 

 splitting cap-cell. Fig. 55, X SSS'i) antherozoids still in membrane. P'ig. 56, empty 

 antheridium. 



57. Branch showing antheridia and archegonia. All the antheridia but «~are 

 aborted, X 162^. 



58. Young archegonia, X ^4'^- 



59. Young archegonium, X 30. «, canal cell ; /', ventral canal cell ; c, egg cell. 



60. Older stage of same before opening, X ^O- 



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



62. Archegonium opening, X ^o. 



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



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



65. The same with an archegonium, X 30- 



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, garaetophyte with archegonium. i>, foot; c, leaf; a', stem of sporophyte, 

 X30. 



70. Young sparophyte. a, foot; />, leaf; c, stem; </, trichomes ; e, gland on 

 rond ; /, calyptra, X 80. 



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



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

 frond. Marking the same in both, o, gametophyte ; />, sporophyte ; r, calyptra, 



X 12^. 



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



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

 bers which represent the magnification of the figures as they stand in the reproduction. 



PL.VfE 5 



75. Sporophyte still attached to gametophyte after the formation of the third leaf. 

 a, foot ; 6, portion of calyptra ; c, root ; d, young root, the dotted lines indicate root-cap 

 which can be seen through the vestigeral covering ; /, leaf; g, rhizome; A, trichomes 

 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 ^7/4- 



