328 MESOZOIC FLORAS OF UNITED STATES. 



Three years later appeared his illustrated folio work" on the geology 

 and paleontology of the Cretaceous of Texas. All the fossils known to 

 him at that time are here described and figured. Verj^ little attempt is 

 made to subdivide the Cretaceous or to work out the stratigraphy, and 

 the fossils are regarded as indicating an Upper Cretaceous age, above 

 the Gault and corresponding to the Senonian and Turonian of d'Orbigny. 

 Specimens of fossil wood that he had sent to Dr. Franz linger, in Vienna, 

 were determined i^y the latter and briefly described without illustration 

 on pages 94-95. Three genera were represented, two of which were 

 dicotyledonous and came, as Roemer admits, from the Tertiary, but the 

 Thuyoxylum americanum Ung. was collected between New Braunfels and 

 Austin in the Cretaceous. It may have come from the Trinity sands. 



The work of the Shumards, done between 1855 and 1860, but not 

 published till 1886,'' gives very little information relative to the Lower 

 Cretaceous, and, as Mi\ Hill remarks, thej^ "place the bottom of the 

 Texas strata on top, the top in the middle, and all the other subdivi- 

 sions equally out of place." ° 



In one of B. F. Shumard's articles ** he gives (p. 583) a section of 

 the Cretaceous, which was made the subject of a critical review by Mr. 

 Jules Marcou,'' in which (p. 93) he introduces his own section, which 

 Mr. Hill characterizes as "an approximately correct ideal section. "■'^ 



Mr. S. B. Buckley devotes a few pages of his report^ to the Creta- 

 ceous, but, as is usual with geologists, confines himself to the beds in which 

 abundant molluscan remains occur. The sand rock near Weatherford, 

 however, described on page 67, undoubtedly belongs to the Trinity, but 

 he does not mention fossil wood nor any organic remains. 



" Die Kreidebildungen Ton Texas und ihre organischen Einschliisse, von Dr. Ferdinand Roemer, Bonn, 

 1852, 100 pages, 11 plates fol. 



6 A Partial Report on the Geology ot Western Texas, consisting of a General Geological Report and a Journal 

 of Geological Observations, etc., by Geo. G. Shumard, Assistant State Geologist of Texas, Austin, 1SS6. Also 

 several articles by G. G. and B. F. Shumard. 



c Am. Journ. Sci., 3d ser.. Vol. XXXIII, January, 1887, p. 75. 



''Observations upon the Cretaceous strata of Texas: Trans. Acad. Sci. St. Louis, Vol. I, No. 4, 1860, pp. 

 582-590. 



'■ Notes on the Cretaceous and Carboniferous rocks of Texas: Proc. Boston Soc. Nat. Hist., Vol. VIII, May, 

 1861, pp. 86-97. 



/ Am. Journ. Sci., 3d ser., Vol. XXXIII, January, 1887, p. 75. 



? First Ann. Rep. Geol. and Agric. Surv. Texas, by S. B. Buckley, State geologist, Houston, 1874, pp. 

 65-69. 



