288 Annals of the Carnegie Museum. 



Genus Populites. 



5. Populites elegans Lesquereux. 



Populites elegans Lesquereux, American Journal of Science and Arts (Second 

 Series), XLVI, 1868, p. 94; Cretaceous Flora, Report of the Geological 

 Survey of the Territories, VI, 1874, p. 59, PI. 3, fig. 3; The Flora of the 

 Dakota Group, U. S. Geological Survey Monograph XVII, 1892, p. 47, PL 

 46, fig. 5, and PI. 47, figs. 2, 3 ; Geological and Natural History Survey of 

 Minnesota, III. 1893, p. 10, PI. A, fig. 2 and PI. B, fig. i. — Newberry, The 

 Later Extinct Floras of North America, U. S. Geological Survey, Monograph 

 XXXV, 1898, p. 54, PI. 8, fig. 3. 



Description : The leaf is orbicular in shape, about 10 cm. long and 

 a little wider. The apex is very broadly rounded; the base somewhat 

 cuneate. The margin is undulate or slightly denticulate. The first 

 pair of secondaries are basilar or nearly so, but rather indistinct. 

 The remaining four or five pairs are distinct, alternate, and branched. 

 The areolation is rectangular and distinct. The leaf resembles very 

 closely in shape, veining, and areolation that of Lesquereux's shown 

 in PI. 47, fig. 3, Flora of the Dakota Group, op. cif. 



Occurrence: Ellsworth County, Kansas, Dakota Sandstone (Cre- 

 taceous). Baron de Bayet Collection, Accession No. 2348, Carnegie 

 Museum, Pittsburgh, Pa. (No. 24). A slightly smaller specimen 

 (N'o. 24a) is also in the collection. 



6. Populites litigiosus (Heer) Lesquereux. 



Populites litigiosa Heer, in Newberry, Illustrations of Cretaceous and Ter- 

 tiary Plants of the Western Territories of the U. S., 1878, PI. 3, fig. 6. 



Populites litigiosus (Heer) Lesquereux, The Flora of the Dakota Group, 

 U. S. Geological Survey, Monograph XVII, 1892, p. 46, PI. 7, fig. 7; PI- 8, 

 fig. s ; and PI. 46, fig. 6 and PI. 47, fig. i. 



Description: The leaf is orbicular-oval, entire, about 8.5 cm. long 

 and 8 cm. wide, with about five pairs of secondaries. The lowermost- 

 secondaries are opposite, the uppermost subalternate. There is a 

 smaller pair of secondaries joining the midrib a short distance below 

 the first large pair. The secondaries are parallel, straight or nearly 

 so, ramose, craspedodrome, distinct, but becoming very thin and indis- 

 tinct toward the borders. The veining of the leaf resembles very 

 closely Newberry's fig. 6, PI. 3, op. cit. In shape it resembles Les- 

 quereux's fig. 7, PI. 7, op. cit. 



