CYCADALES . i6l 



44. Stopes, Marie C, On the double nature of the cycadean integument. 

 Annals of Botany 19:561-566. 1905. 



45. Thomson, R. B., The megaspore membrane of the gymnosperms. Univ. 

 Toronto Biol. Series no. 4. pp. 64. pis. 5. 1905. 



46. Chamberlain, Charles J., The ovule and female gametophyte of Dioon. 

 Bot. Gazette 42:321-358. ph. 13-15. figs. p. 1906. 



47. Pearson, H. H. W., Notes on the South African cycads. I. Trans. S. 

 African Phil. Soc. 16:341-354. pis. 6-8. 1906. 



48. MlYAKE, K., Ueber die Spermatozoiden von Cycas revoluta. Ber. Deutsch. 

 Bot. Gesell. 24:78-83. pi. 6. 1906. 



49. Seward, A. C, Notes on cycads. Proc. Cambridge Phil. Soc. 13:293-302. 

 1906. 



50. Stopes, M. C., and Fujii, K., The nutritive relations of the surrounding 

 tissues to the archegonia in gymnosperms. Beih. Bot. Centralbl. 20:1-24. 

 pi. I. 1906. 



51. WiELAND, G. R., American fossil cycads. Publ. No. 34, Carnegie Institution 

 of Washington, pp. 296. pis. jo. figs. 138. 1906. 



52. Caldwell, Otis W., Microcycas calocoma. Bot. Gazette 44:118-141. pis. 

 10-13. fig^- '4- 1907- 



53. Chamberlain, Charles J., Preliminary note on Ceratozamia. Bot. Gazette 

 43:137. 1907. 



54. Land, W. J. G., Fertilization and embryogeny in Ephedra trijurca. Bot. 

 Gazette 44:273-292. pis. 20-22. 1907. 



55. Nathorst, a. G., Palaeobotanische Mitteilungen. I. Pseudocycas, eine 

 neue Cycadophytengattung aus den cenomanen Kreideablagerungen Gron- 

 lands. Handl. Kgl. Svensk. Vetensk.-Akad. 42:1-11. pis. 1-3. 1907. 



56. Smith, Frances Grace, Morphology of the trunk and development of the 

 microsporangium of cycads. Bot. Gazette 43:187-204. pi. 10. 1907. 



57. Thomas, Ethel N., A theory of the double leaf trace founded on seedling 

 structure. New Phytologist 6:77-91. figs. 4. 1907. 



58. DoRETY, Helen A. (Sister Helen Angela), The embryo of Ceratozamia; 

 a physiological study. Bot. Gazette 45:412-416. ;?^i. 7. 1908. 



59. , The seedling of Ceratozamia. Bot. Gazette 46:203-220. pis. 



12-16. 1908. 



60. Nathorst, A. G., Palaeobotanische Mitteilungen. III. Lycostrobus 

 Scottii, eine grosse Sporophyllahre aus den ratischen Ablagerungen Schonens. 

 Handl. Kgl. Svensk. Vetensk.-Akad. 43:1-12. pis. i, 2. 1908. 



61. South, F. W., and Compton, R. H., On the anatomy of Dioon edule Lindl. 

 New Phytologist 7:222-229. 1908. 



62. Thiessen, Reinhardt, The vascular anatomy of the seedUng of Dioon 

 edule. Bot. Gazette 46:357-380. pis. 23-2g. 1908. 



63. Chamberlain, Charles J., Spermatogenesis in Dioon edule. Bot. Gazette 

 47:215-236. pis. 15-18. figs. 3. 1909. 



64. , Dioon spinulosum. Bot. Gazette 48:401-413. ^gi. 7. 1909. 



