Gress : Fossil Plants of the Dakota. 295 



1 8. Betulites Westii var. inaequilateralis Lesquereux. 



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

 Group, U. S. Geological Survey, Monograph XVII, 1892, p. 62, PI. 5, figs. 

 10-13. 



Description: The leaf is about 2.5 cm. long and 2.5 cm. wide. It 

 is a well-preserved leaf, showing the typical venation of Betulites 

 Westii. It is somewhat inequilateral, which is a characteristic of the 

 variety. 



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

 taceous). Chas. Sternberg Collection, U. S. National Museum (C. 

 M., Accession No. 4799). Carnegie Museum, Pittsburgh, Pa. {No. 

 67)- 



19. Betulites rugosus Lesquereux. 



Betulites rugosus Lesquereux, The Flora of the Dakota Group, U. S. Geolo- 

 gical Survey, Monograph XVII, 1892, p. 65. PI. 6, figs. 3-5. 



Description : We have both the upper and the lower surface of the 

 same leaf. Only a portion of the petiole is present, and the apex is 

 not perfect. The leaf is about 5 cm. in diameter both ways, with a 

 truncate base slightly deflexed to the petiole. The nervation is strong. 

 The primary is slightly curved. There are about eight pairs of sec- 

 ondaries; the lowermost is opposite and ramose, the others are alter- 

 nate, equidistant, and parallel. The margin is denticulate. The leaf 

 is slightly inequilateral. In this respect it resembles Lesquereux's 

 fig. 3, op. cit. Nos. 18 and i8a are halves of the same nodule. 



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

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

 Musetim. Pittsburgh, Pa. (Nos. 18, i8a). 



URTICALES. 



Family MORACE.^. 

 Genus Ficus. 



I 20. Ficus macrophylla Lesquereux. 



Ficus macrophylla Lesquereux, The Flora of the Dakota Group, U. S. 

 Geological Survey, Monograph XVII, 1892, p. 76, PI. 11, fig. i. 



Description : Our specimen reseinbles the one described and figured 



ANN. CAR. MUS., XIII. 20, FEB. 21, 1922. 



