— 138 — 



1893. Sacco F. Contributions à la connaissauce paléontologigue de.s Argile.s écailleuees et dee seni 



ophiolitiques de l'Apennin septentrional. Bulletin de la Soeiélé Belge de Geologie de Paleon- 

 tologie et di Hydrologie. Tom. VII. Bruxelles 1893. 



1894. Ward L. F. Fos.sil cycadean trunks of north America with a revision of the genuB Cyca- 



deoidea Buckland. Proceedings of the Biologica! Society of Washington. Voi. IX. Washington 



1894. 



1894. Ward Lester F. Recent Diseoveries of Cycadean Trunks in the Potoinac Formation of Mary- 

 land. Bulletin of the Torrey Botanical Club. Voi. 21 X." 7. Iuly 20 1894. New York, 1894. 



1896. Ward L. F. Some Analogies lower Cretaceous of Europe and America. Annual Report Geolo- 



gical Survey 1894. — Washington 1890. 



1897 Solms-Laubach . H. Graf. zu. Ueber Medullosa Leuckarti. Botanisehe Zeitung. Iahr IV. 

 Heft. X. Leipzig 1897. 



1897. Ward L. F. Description of the species of Cycadeoidea or fossil cycadean trunks thus far discoveivd 



in the Iron ore belt Potoinac formation of Maryland. — Proceedings of the Biological So- 

 ciety of Washington. Voi. XI. Washington 1897. 



1899. Ward L. F. The Cretaceous Formation of the Black Hills as indicated by the Fossil Piante. 

 — Washington 1899. 



1899. Wieland G. R. A Study of some American fossil Cycads. Pare. 1 The male fiower of Cyca- 

 deoidea. American Journal of Science 4 ,b Ser. Voi. VII. New Haven 1899. 



1899. Wieland G. R. A Study of some American fossil Cycads. Part. II. The Leaf Structure of 



Cycadeoidea. American Journal of Science. Voi. VII. Aprii New Haven 1899. 



1900. Wieland G. R. The Yale Collection of fossil Cycads. Yale Scientific monthly. Voi. VI X. •'. 



New Haven 1900. 



1900. Wieland G. R. A Study of. some American fossil Cycads. Part. IV. On the Microsporangiar^ 

 fructification of Cycadeoidea. Americani Journal of Science. 4" 1 Ser. Voi. XI. New Haven 

 lune 1900. 



1903. Wieland G. R. A Grant from the Carnegie Institution of Paleobotany — American Journal 



of Science. 4 ,h Ser. Voi. XVII. New Haven 1903. 



1904. Ward L. F. A famous fossil Cycad. - American Journal of Science Voi. XVIII. Washin- 



gton 1904. 



1905. Sacco F. Les formations ophiolitiféres du Crétacé. Bulletin de la Soc. Belge de Geologie, de 



Paleontologie et. d' Hydrologie. T. XIX, 1905. 



1906. Wieland G. R. American fossil Cycads. Carnegie Institution of Washington. Bull. X. 34. 



Aug. 1906. 



1908. Wieland G. R. Historic fossil Cycads. American Journal of Science. Voi. XXV. 4 ,c Ser. 

 Febr. 1908. 



