298 Annals of the Carnegie Museum. 



Description : Our specimen shows almost a perfect leaf, the margin 

 in places being a little indefinite. It is about 15 cm. wide and about 

 I r cm. long. The venation is almost perfect and is very similar to 

 that shown on PI. 2, fig. i, of Hayden's Report, op. cit., and PI. 3, 

 fig. I, of The Cretaceous and Tertiary Floras, op. cit. Indeed, the 

 two figures looked so much like our specimen that I at first thought 

 they might have been made from our fossil, which, too, is of the Chas. 

 Sternberg collection and identified by Lesquereux. On close com- 

 parison the size and veining are seen to vary slightly. 



Occurrence : Fort Harker. Kansas, Dakota Sandstone (Cretaceous). 

 Chas. Sternberg Collection, Accession No. 4799, Carnegie Museum, 

 Pittsburgh, Pa. (No. 58). 



Remarks: No. §8a is a fragment of a large leaf from Ellsworth 

 County, Kansas, in the Bayet Collection, which resembles in venation 

 Platanns privicrz'a Lesquereux and our modern Platanus occidentalis 

 so closely that I, at first, thought it should be referred to Platanns 

 priiiicrva, but on close comparison with Aspidiophyllmn trilobatum I 

 have decided that it shows closer relationship to the latter. There 

 certainly is a close interrelation of these two genera and they prob- 

 ably have had a common ancestor. ( See discussion under Genus 

 Platanus.) 



RANUNCULALES. 



Family MAGNOLIACE.F:. 



Genus Magnolia. 

 24. Magnolia alternans Heer. 



Magnolia alternans Heer, Phyllites Cretacees du Nebraska, 1866, p. 20, PI. 3, 

 figs. 2-4; PI. 4, figs. I, 2; Flora Fossilis Arctica, III, Abth. 2, 1874, p. 116. 

 PI. 33, figs. 5 and 6, and PI. 34, fig. 4; Ibid.. VI, Abth. 2, 1882, p. 91, PI. 21. 

 fig. 2, and PI. 46, fig. 21 (not seen). 



Lesquereux, American Journal of Science and Arts (second series), XLVI, 

 1868, p. 100; Cretaceous Flora, Report of the Geological Survey of the Ter- 

 ritories, VI, 1874, p. 92, PI. 18, fig. 4; Illustrations of Cretaceous and Ter- 

 tiary Plants, U. S. Geological Survey of the Territories, 1878, PI. 5, fig. 6; 

 The Flora of the Dakota Group, U. S. Geological Survey, Monograph XVII, 

 1892, p. 201, PI. 34, fig. II. 



Smith, Geology Coastal Plain in Alabama, 1894, p. 348. 

 Pollard, Transactions of X. Y. .Academy of Science, XIII. 1894, p. 181. 



