302 Annals of the Carnegie Museum. 



Description: Trilobate leaf about 15 cm. long from base to apex of 

 center lobe, and about 15 cm. between apices of the lateral lobes. The 



lobes are conical, entire, and acute, the middle being somewhat longer 

 and broader than the lateral. The sinuses are open and rounded, the 

 margins forming an angle of about 90°. The base is decurrent to the 

 petiole (broken). The lateral primaries branch from the midrib 2 

 cm. from the base. Their angle of divergence from the midrib is 

 about 35°. The secondaries are camptodrome; the first pair origi- 

 nates about 3.5 cm. from the origin of the lateral primaries, extending 

 to the sinuses of the leaf. The secondaries are connected by ter- 

 tiaries, which form somewhat rectangular areolations. 



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

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

 Museum, Pittsburgh, Pa. {N'o. 5). A smaller very well-preserved 

 specimen {No. Ja) from the same locality is of the Hambach Collec- 

 tion, U. S. National Museum (C. M., Accession No. 4799). Another 

 specimen (iVo. 5&) is from Fort Harker, Kansas, Chas. Sternberg 

 Collection, U. S. National Museum (C. M., Accession No. 4799). 



29. Sassafras Mudgei Lesquereux. 



Sassafras Mudgei Lesquereux, American Journal of Science and Arts (second 

 series), 46, 1868, p. 99; Cretaceous Flora, U. S. Geological Survey of the 

 Territories, VI, 1874, p. 78, PI. 14, figs. 3-4 and PI. 30, fig. 7; The Flora 

 of the Dakota Group, U. S. Geological Survey, Monograph XVII, 1892, 

 p. 100 (reference only). 



Knowlton, Bulletin U. S. Geological Survey No. 152, 1898 (gives syn- 

 onyms). 



Newberry, The Later Extinct Floras of North America, U. S. Geological 

 Survey, Monograph XXXV, 1898, p. 98. 



Ward, Nineteenth Annual Report U. S. Geological Survey, Part 2, 1899, 

 p. 705, PI. 170, figs. 4, 5, and PI. 171, fig. I. 



Description : Our specimen shows the middle lobe and a small por- 

 tion of each of the side lobes. There is no doubt about the identity 

 of the specimen. It came from the U. S. National Museum by ex- 

 change and bore a label referring it to this species. 



Occurrence : Salina, Kansas, Dakota Sandstone (Cretaceous), Ac- 

 cession No. 4799, Carnegie Museum. Pittsburgh, Pa. (No. 60). 



