E antes . — The Morphology of Agathis australis . 37 
17 . Thomson, R. B. : The Megasporophyll of Saxegothaea and Microcachrys . Bot. Gazette, vol. 
xlvii, 1909, p. 345. 
18 . Van Tieghem, P. : Anatomic compare de la fleur femelle et du fruit des Cycad^es, des 
Coniferes, et des Gn&acees. Ann. des Sci. Nat., Bot., ser. 7, t. x, 1869, p. 269. 
19 . Worsdell, W. C. : The Structure of the Female ‘ Flower ’ in Coniferae. Ann. Bot., vol. xiv, 
1900, p. 39- 
DESCRIPTION OF PLATES I TO IV. 
Illustrating Mr. Eames’s paper on Agathis australis. 
Note : The figures are of Agathis australis, with the exception of Nos. 37 and 42. 
PLATE I. 
Fig. 1. Habit ; showing mature male cones, and female cones at time of pollination and of 
fertilization, x § . 
Fig. 2. Longitudinal section of ovule just before fertilization ; showing distribution of archegonia 
and freedom of nucellus. x 7. 
Fig. 3. The same ; after fertilization. The suspensors have thrust the embryo down into the 
lower portion of the endosperm, x 7. 
Fig. 4. Longitudinal section of the ripe seed ; showing the large embryo and the dry beak, 
x 6. 
Fig. 5. Longitudinal section of young ovule ; showing developing embryo-sac and ‘ spongy 
tissue \ X 500. 
Fig. 6. Portion of Fig. 3 enlarged to show course of suspensors. x 25. 
Fig. 7. Longitudinal section of tip of mature gametophyte and surrounding tissue ; showing the 
cap of the megaspore membrane, x 80. 
Fig. 8. Longitudinal section of suspensor coil with embryo, x 80. 
Fig. 9. Longitudinal section of upper portion of nucellus and gametophyte ; showing erosion 
of the latter by pollen-tubes, x 80. 
Fig. 10. The same ; showing course of pollen-tubes, x 80. 
Fig. 11. A typical mature archegonium. x 125. 
Fig. 12. The archegonium with mature central cell, x 250. 
PLATE II. 
Fig. 13. Archegonium (sectioned somewhat obliquely); showing young egg nucleus and ventral 
canal nucleus, the latter at the side and beginning to disorganize, x 250. 
Fig. 14. Archegonium with young egg nucleus and ventral canal nucleus in median position, 
x 200. 
Fig. 15. Archegonium showing ‘ pseudo-fertilization \ x 500. 
Fig. 16. Body cell just before division, passing down between nucellus and embryo-sac. x 500. 
Fig. 17. The male cells passing down between the nucellus and the gametophyte; the large 
nuclei are prominent, the limitation of the cytoplasm about each can faintly be seen, x 500. 
Fig. 18. A male cell with tube cytoplasm and two accompanying nuclei, x 500. 
Fig. 19. The young egg nucleus and surrounding cytoplasm, seen in transverse section of the 
archegonium. x 1 ,000. 
Fig. 20. The mature egg nucleus with surrounding cytoplasm, seen in transverse section of the 
archegonium. x 1 ,000. 
Fig. 21. The fusion nucleus and its kinoplasmic sheath with the intranuclear spindle of the first 
division, x 1,350. 
Fig. 22. The proembryo : two-nuclear stage, the nuclei large and free from the kinoplasmic 
sheath, x 1,200. 
