Won dell. — The Structure and Origin of the Cycadaceae. 159 
Worsdell : The Affinities of the Mesozoic Fossil Bennettites Gibsonianus. Ann. Bot., vol. xiv, 
1900. 
: Contributions to the Comparative Anatomy of the’ Cycadaceae. Trans. Linn. Soc., 
vol. vi, 1901. 
: The Origin of Modern Cycads. Rep. Brit. Assoc. Bradford, 1900. 
: The Evolution of the Vascular Tissue of Plants. Eot. Gaz., vol. xxxiv, 1902. 
: The Morphology of Sporangial Integuments. Rep. Brit. Assoc. Belfast, 1902. 
: The Structure and Morphology of the ‘Ovule’; an historical sketch. Ann. Bot., 
vol. xviii, 1904. 
Zeiller : Flore fossile du bassin houiller de Valenciennes. 1888. 
- — : Bassin houiller et permien d’Autun et d’fepinac. Vol. i, 1890. 
: Une nouvelle classe de Gymnospermes ; les Pteridospermees. Revue gdn. d. Sciences, 
Aug. 30, 1905. 
Zimmerman : Ueber das Transfusionsgewebe. Flora, i$ 3 o. 
