FAUNAF, AND Fl-OKAl. I'A KA M -KLIS.M 185 



coinnion ones, and all have a very great vertical range, so tliat there they 

 are by no means determinative. If the lists were examined without 

 reference to the horizons ascribed to them, their stratigraphic positions 

 would certainly be pronounced the same as that for the forms from the 

 Des Moines series of Missouri. 



The fossils enumerated by the same author as indicating the top of 

 the Missourian of Kansas must certainly be paralleled with the base of 

 that formation. 



FLORA L PA RA L LEL ISM 



The earlier references* to the coal floras of Arkansas throw little 

 light upon the stratigraphic position of the plant beds. Lesquereaux f 

 in his Coal Flora describes a number of species from the Arkansas 

 region. 



Smith X alludes to the unpublished monograph by Fairchild and 

 White on the " Fossil Flora of the Coal Measures of Arkansas,^' in which 

 it is said to be stated that all the published plant remains are regarded 

 as belonging to the upper or productive Coal Measures — of Pennsyl- 

 vania presumably. 



In a paper read before the Geological Society of Washington § by 

 David White it is reported that — 



"The flora of the Grady, or Hartshorn, coal he finds to indicate a reference to 

 the 'lower coal-bearing division ' of Winslow, or the basal portion of the Upper 

 Coal Measures of Branner and Smith, in Arkansas, and a stage near the base of 

 the Alleghany series of the Pennsylvania-Ohio bituniinoas regions. The plants 

 of the McAlester coal, about 1,500 feet above the Grady coal, assure a correlation 

 with the upper coal -bearing division of AVinslow, in Arkansas, a stage, perhaps, 

 near the Lane [Parkville] shales in the lower half of the Missourian in Kansas, 

 probably below the Pittsburg coal, in Pennsylvania, or near coals F or G of the 

 northern Anthracite field. Vegetable remains collected by Messrs. Taff and 

 Richardson from a hqrizon about 2,000 feet above the McAlester coal constitute a 

 distinctly Coal Measures flora, without any characteristic Permian species." 



The principal fact brought out b}^ the testament of the fossil plants is 

 that the coals of western Arkansas are well up in the general section of 

 the Coal Measures, at a horizon that would be somewhere in the Upper 

 Coal Measures of the Appalachian region. 



The plants of the Clinton region in Missouri, according to White, || 



♦Arkansas Geol. Survey, Second Ann. Rept., 1860, p. 309. 



t Pennsylvania Geol. Survey, vol. P, 1884, p. 55. 



X Journal of Geology, vol. II, 1894, p. 195. 



g Science, n. s., vol. vii, 1898, p. 612. 



II U, S. Geol. Survey, monog. xxxvii, 1900. 



