the Sporophylls of the Cycadaceae . 241 
Fig. 7. Stangeria paradoxa , Th. Moore. Transverse section of one of the bundles 
in the stalk of the 9 sporophyll which supply the megasporangia, x 145. 
Fig. 8. Stangeria paradoxa , Th. Moore. Transverse section of a bundle from 
the lamina of the $ sporophyll. x 145. 
Fig. 9. Stangeria paradoxa , Th. Moore. Diagram of the vascular bundle- 
system of a barren sporophyll at base of <J cone. 
Fig. 10. Stangeria paradoxa , Th. Moore. Transverse section of a concentric 
bundle in a barren sporophyll. x 300. 
Fig. 11. Bowenia spectabilis, Hook. Diagrammatic transverse view of the 
arrangement of the vascular bundles in the stalk of the 9 sporophyll. x 35. 
Fig. 12. Bowenia spectabilis , Hook. Transverse section of a concentric bundle 
from stalk of the $ sporophyll. x 450. 
Fig. 13. Bowenia spectabilis, Hook. Basal part of young <$ cone, showing the 
barren sporophylls. Nat. size. 
Fig. 14. Bowenia spectabilis , Hook. Transverse section of a concentric bundle in 
a barren sporophyll. x 450. 
Fig. 15. Dioon edule , Lindl. Transverse section of one of the bundles which 
supply the megasporangia in the stalk of the $ sporophyll. x 100. 
Fig. 16. Dioon edule , Lindl. Transverse section of a bundle in the lamina of the 
$ sporophyll. x 225. 
Fig. 17. Dioon edule, Lindl. Diagram of the vascular bundle-system supplying 
the megasporangium. 
Fig. 18. Encephalartos horridus , Lehm. Transverse section of a partially 
concentric bundle in the stalk of the 9 sporophyll. x no. 
Fig. 19. Encephalartos horridus , Lehm. Transverse section of a bundle in the 
stalk of the 9 sporophyll. x no. 
Fig. 20. Encephalartos horridus , Lehm. Transverse section of a concentric 
bundle entering the megasporangium (semi-diagrammatic), x 100. 
Fig. 21. Zamia Lindeni, Regel. Diagrammatic transverse view of the arrange- 
ment of the bundles in the stalk of the sporophyll. x 50. 
Fig. 22. Zamia Lindeni , Regel. Diagrammatic transverse view of the arrange 
ment of the bundles in the stalk of the barren sporophyll. x 50. 
Fig. 23. Zamia Loddigesii, Miq. Transverse section of a bundle in the lamina 
of the 9 sporophyll. x 145. 
Fig. 24. Zamia Loddigesii , Miq. Transverse section of a bundle supplying 
a barren sporophyll from the peduncle of the 9 plant, x 1 00. 
Fig. 25. Zamia Leiboldii , Miq. Dorsal and lateral views of an anomalous 9 
sporophyll, bearing three sporangia. Nat. size. 
Fig. 26. Ceratozamia mexicana , Brongn. Diagrammatic transverse view of the 
arrangement of the bundles in the stalk of the <5 sporophyll. x 35. 
Fig. 27. Ceratozamia Miqueliana, H.Wendl. Diagrammatic transverse view of 
the arrangement of the bundles in the stalk of the 9 sporophyll. x 20. 
Fig. 28. Ceratozamia Miqueliana , H. Wendl. Transverse section of a bundle in 
the lamina of a young 9 sporophyll. x 450. 
