DESCRIPTION OF PLATES 
The following abbreviations are used: 
a, receptive portion of placenta; b, antipodal haustorium; c, embryo; e, 
endosperm; f, micropylar haustorium; g, egg; h, polars; j, antipodals; 
k, synergid; m, nuclei of micropylar haustorium; n, integument; 0, funi- 
culus; t, pollen tube; v, placenta; v, sperm 
PLATE I 
Fig. 1. Longitudinal section through pistil showing relative size and 
arrangement of parts soon after fertilization 
PLATE II 
Fig. 2. Early stage showing spore-mother-cell, and outlining below the 
‘‘receptive’’ portion of the placenta later to receive the basilar 
haustorium 
Fig. 3. Stage showing the four megaspores 
Fig. 4. Dominant megaspore with other megaspores and nucellar tissue 
8 Sas} gas} 
breaking dovm 
Fig. 5. Two-celled gametophyte; nucellus digested, and micropylar 
haustorium entering placenta 
Fig. 6. Early post-fertilization, showing two-celled endosperm, miecro- 
pylar haustorium, and receptive tissue 
