CBETACEOUS PLATTTS. 45 



Ward, L. F.— 1895a. The Potomac Formation: lutli Am. Hep. V.S. 

 Geol. Surv., pp. 313-397, pis. ii, iii, iv. 



1895 B. The Mesozoio Flora of Portugal compared with that of the 



United States : Science, n.s., toI. 1, pp. 337-346. 



1896. Some Analogies in the Lower Cretaceous of Europe and 



America: 16th Ann. Eep. U.S. Geol. Surv., pp. 463-540, 

 pis. xcvii-ovii. 



1897 A. A New Species of Eucalyptus from the Dakota Group of 



South-Western Kansas : Bull. Torrey Bot. Club, vol. 24, pp. 576- 



577, text-fig. 

 1897 B. Professor Fontaine and Dr. Newberry on the Age of the 



Potomac Formation : Science, n. s., toI. 5, pp. 411—423. 

 1897 c. Descriptions of the Species of CycaiJemdm, or Fossil Cjca- 



dean Trunks, thus far discoTered in the Iron Ore Belt, Potomac 



Formation, of Maryland : Proc. Biol. Soc. Washington, yoI. 11, 



pp. 1-17. 



1899 A. Descriptions of tlie Species of Cycadeoidea, or Fossil Cyca- 



dean Trunks, thus far determined from the Lower Cretaceous 

 Eim of the Black Hills : Proc. U.S. Nat. Mus., toI. 21, pp. 193- 

 229. 



• 1899 B. The Cretaceous Formation of the Black Hills as indicated 



by the Fossil Plants (with the collaboration of W. P. Jenney, W. 

 M. Fontaine, and F. H. Knowlton) : 19th Ann. Eep. U.S. Geol. 

 Sury., pt. 2, pp. 521-712, pis. iTii-cljocii. 



1900. Status of the Mesozoic Floras of the United States.— I. The 



Older Mesozoic : 20th Ann. Eep. U.S. Geol. Surv., pp. 217^30, 

 pis. xxi-clxxix. 



1900a. Elaboration of the Fossil Cycads in the Yale Museum: 



Amer. Journ. Sci., ser. 4, vol. 10, pp. 327-345, pis. ii-iv. 



1905. Status of the Mesozoic Floras of the United States (Second 



paper, with the collaboration of W. M. Fontaine, A. Bibbins, and 



G. E. Wieland): Mon. U.S. Geol. Surr., no. 48, pp. 616, 



pis. cxix. 

 Watelet, a. — 1866. Description des Plantes Foesiles du Eassin de Paris. 



Pp. 264, pis. Ix. Pai-is. 

 Webek, 0.— 1852. Die Tertiarflora der Niederrheinischen Braunkohlen- 



formation : Palseontogr., toI. 2, pp. 117-236, pis. xTiii-xxT. 



1856. See Wessel and Weber. — 1856. 



Weed, W. H.— 1899. See Hague, A., et aiw.— 1899. 



and Knowlton, F. H. — 1893. The Laramie and the Overlying LiTing- 



ston Formation in Montana, with Eeport on Flora : Bull. U.S. 



Geol. Surv., no. 105, pp. 1-68, pis. i-vi. 

 and PiRasoN, L. Y. — 1898. Geology and Mineral Eesouroes of the 



Judith Mountains of Montana : 18th Ann. Eep. U.S. Geol. Surv., 



pt. 3 [fossil plants by Fontaine, pp. 481, 482]. 

 Welscif, J. — 1897. Sur I'Age s^nonien des gres a Sahalites andegavensis de 



I'oueat de la France : Comptes Eendus Acad. Sci. Paris, vol. 125, 



pp. 667-669. 



