816 SYSTEMATIC PALEONTOLOGY 



Genus POPULUS Linne 

 [Sp. PL, 1753, p. 1034] 



POPULUS STYGIA Heer 

 Plate LVIII, Fig. 1 



Populus stygia Heer, 1873, Fl. Foss. Arct., Bd. iii, Ab. ii, p. 107. 



Populus stygia Heer, 1882, Ibidem, Bd. vi, Ab. ii, p. 64, pi. xvii, fig. 5; pi. 



xviii, figs. 5-8; pi. xxxix, fig. 5. 

 Populus stygia Heer, 1883, Ibidem, Bd. vii, p. 30, pi. Iv, fig. 6; pi. Ixiv, 



fig. 10. 

 Populus stygia Lesquereux, 1892, Mon. U. S. Geol. Survey, vol. xvii, p. 44, 



pi. iii, fig. 12. 

 Populus stygia Hollick, 1907, Ibidem, vol. 1, p. 49, pi. vii, fig. 30. 



Description. " P. foliis cordatis, integerrimis, nervo primario valido, 

 nervis secundariis ramosis, basilaribus 5, infimis margine approximatis." 

 Heer, 1873. 



This species is variable in size with a subcoriaceous texture, entire 

 margins, cordate base and obtuse tip, with a strongly defined venation. It 

 occurs in both the Atane and Patoot beds of west Greenland, the Dakota 

 sandstone of Kansas, and the Magothy formation of Marthas Vineyard. 

 It is represented in Maryland by very fragmentary material at Bodkin 

 Point, but rather more characteristic although scanty material from 

 Sullivan's Cove on Round Bay, which is certainly identical with the 

 Dakota Sandstone leaves which Lesquereux referred to this species. 



Occurrence. MAGOTHY FORMATION". Bodkin Point, Sullivan's Cove, 

 Anne Arundel County. 



Collection. U. S. National Museum. 



Order FAGALES 



Family FAGACEAE 

 Genus QUERCUS Linne 

 [Sp. PL, 1753, p. 994] 



QUERCUS MORRISONIANA Lesquereux 

 Plate LVIII, Fig. 2 



Quercus morrisoniana Lesquereux, 1883, Cret. and Tert. Flora, p. 40, pi. 



xvii, figs. 1, 2. 

 Quercus morrisoniana Lesquereux, 1892, Mon. U. S. Geol. Survey, vol. xvii, 



p. 55. 



