470 SCIENCE PROGRESS. ' 



Ward, L. F. (i) Fossil Cycadean trunks of North America, with 



a revision of the genus Cycadeoidea Buckland. Proc. Biol. 



Soc. Washington, vol. ix., p. 75, 1894. 

 (2) The Mesozoic Flora of Portugal compared with that of 



the United States. Science, 29th March, 1895. 

 (3) The Potomac Formation. Ann. Rep. U. S. Geol. Surv., 



No. xv., 1895. 



(4) Some Analogies in the Lower Cretaceous of Europe 



and America. Ann. Rep. U. S. Geo/. Surv., No. xvi., 1896. 



(5) Descriptions of the species of Cycadeoidea or fossil 



Cycadean trunks, thus far discovered in the Iron-ore belt, 

 Potomac formation of Maryland. Proc. Biol. Soc. Washing- 

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Yokoyama, M. Mesozoic plants from Kozuke, Kii, Awa and 

 Tosa. Jour. Coll. Sci. Japan, vol. vii., pt. iii., p. 201, 1894. 



Zeiller, R. Les Provinces botaniques de la fin des Temps 

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A. C. Seward. 



