Gress: Fossil Plants of the Dakota. 329 



thick petiole. The midvein is very thick toward the base, becoming 

 thin at the apex. There are about seven pairs of secondary veins, the 

 lowermost pairs are opposite, the others alternate. On one side a 

 thin nerve can be seen running near the margin of the base. The 

 secondaries arch in passing to the borders and are camptodrome. 

 Some of them show branching near the middle. The tertiary venation 

 and areolation are not distinct. I refer this specimen to Viburnum 

 robnstum with a great deal of hesitancy. The leaf in outline and in 

 secondary venation resembles Diospyros hrachyscpala Alex. Braun, 

 as described and figured by Berry in The Lower Eocene Floras of 

 Southeastern North America, U. S. Geological Survey, Professional 

 Paper 91, 1916, p. 333, PI. 107, fig. 6. Since Diospyros hrachyscpala 

 has not been found in a formation so early as the Dakota, and since 

 the tertiary venation and areolation are not very distinct, I have re- 

 ferred it to Vihiirnum robusHim. 



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

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

 Museum, Pittsburgh, Pa. (No. 34^ 



