Gress : Fossil Plants of the Dakota, 293 



Description : The leaf is 4 cm. long and 3.4 cm. broad. It is oblong- 

 ovate with truncate base, rounded apex, and finely denticulate margin. 

 The venation is the characteristic venation of all the specimens of 

 Bctiilitcs IVcstii. The leaf is a little larger than Lesquereux repre- 

 sents it, but it seems to fit oblongiis better than any other variety of 

 Bctiilitcs Wcstii. 



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

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

 Museum, Pittsburgh, Pa. {Nos. ig, ipa). 



13. Betulites Westii var. subintegrifolius Lesquereux 



Betulites Westii var. subintegrifolius Lesquereux, The Flora of the Dakota 



Group, U. S. Geological Survey, Monograph XVII, 1892, p. 61, PI. 4, figs. 



1-4. 



Description: The leaves are about 4 cm. long and from 2.5 to 3 cm. 

 broad. They are oval, obtuse, cordate, with entire margins. The 

 venation is distinctly that of Betulites Westii. The leaf resembles 

 fig. I, Lesq., op. cit., with the exception that it is longer in proportion 

 to its width than the figure indicates. These two specimens, which 

 are impressions of the same leaf, are more elliptical in outline than 

 any figures of Betulites JVestii shown by Lesquereux. I do not think 

 that a new species or even variety should be made of this leaf, and 

 have, therefore, referred it to subintegrifolius. 



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

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

 Museum, Pittsburgh, Pa. (Nos. 20, 20a). 



14. Betulites Westii var. multinervis Lesquereux. 



Betulites Westii var. multinervis Lesquereux, The Flora of the Dakota Group, 

 U. S. Geological Survey, Monograph XVII, 1892, p. 62, PI. 4, figs. 20-22. 



Description: The leaves are about 2.5 cm. long and about 2 cm. 

 wide. They are oval, obtuse, truncate, distinctly denticulate, with 

 eight or nine pairs of secondary nerves. The venation is distinctly 

 that of Betulites Westii. 



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

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

 Museum, Pittsburgh, Pa. (No. 22). No. 22a is from the U. S. Na- 

 tional Museum (C. M., Accession No. 4799). 



