3 § 
E antes . — The Morphology of A gat his australis . 
Fig. 23. The same ; thirty-two-nuclear stage, transverse section ; showing lower part of young 
suspensor cap. x 800. 
Fig. 24. The same ; vertical section at time of first wall formation. Three tiers of cells are 
evident : the upper, suspensor initials ; the median, the embryo proper ; the lower, the undifferentiated 
embryonic cap. x 800. 
PLATE III. 
Fig. 25. The archegonium at time of fertilization ; shojwing the large male nucleus in the 
centre, x 500. * 
Fig. 26. The same archegonium, a section just below Fig. 25 ; the egg nucleus is seen, and 
a small tangential section of the male nucleus, x 500. 
Fig. 27. The fusion nucleus surrounded by the kinoplasmic sheath, x 700. " t 
Fig. 28. The proembryo ; thirty-two-nuclear stage with suspensor cap of cytoplasm.' f x- 600. 
Fig. 29. The proembryo in the archegonium ; four-nuclear stage, x 300. j 
Fig. 30. The same ; eight-nuclear stage, x 300. / ~' 
Fig. 31. The proembryo almost mature ; showing the suspensors elongating distally, the*' srabTyo 
proper, and the penetrative cap. x 350. 
Fig. 32. The embryo proper with its penetrative cap and the base of its suspensors penetrating 
the endosperm, x 700. 
Fig. 33. The embryo enlarging, the cap disintegrating, x 700. 
Fig. 34. The same ; a slightly later stage, x 700. 
Fig- 35. The same; a still later stage ; the cap has disappeared, x 700. 
Fig. 36. The proembryo ; thirty-two-nuclear stage, before suspensor-cap formation. x 800. 
PLATE IV. 
Fig. 37. Agathis borneensis-, transverse section of axial bundle of the cone ; showing invasion by 
pollen-tu,bes. x 125. 
Fig. 38. Transverse section of archegonium neck and surrounding tissue ; showing erosion by 
pollen-tube around the resistant neck cells, x 250. 
Fig. 39. Top of archegonium with thick-walled neck cells, x 800. 
Fig. 40. Transverse section of archegonium neck, x 500. 
Fig. 41. The trace of the megasporophyll within the cortex of the cone ; showing a pollen-tube 
in the xylem, also three in the phloem at the lower side of the figure, x 250. 
Fig. 42. Araucaria Bidwillii ; transverse section of the vascular supply of the megasporophyll 
close to the cone axis ; showing the two original bundles, the upper inverted, x 40. 
