208 MESOZOIC FLORAS OF UNITED STATES. 



August 19, 1843, which was elaborated by James Hall and the age pro- 

 nounced Oolite by him. Part of this collection is in the National Museum, 

 including the principal types figured by Hall, and I long ago sent it to 

 Professor Lesquereux, who examined it and gave his reasons for agreeing 

 with Hall, notwithstanding Heer's opinion to the contrary. Hall admitted 

 the existence of one dicotyledonous leaf, which should have sufficed to 

 prove his error as to age. A single glance at the leaves called Glossopteris 

 Phillipsii by Hall is sufficient to show that they are dicotyledons. I have 

 already given references to all the papers dealing with these plants," but 

 should have referred to the page of Fremont's report on which the itinerary 

 occurs, viz, page 131. The locality is near Evanston, Wyo., and the 

 plants probably occurred in the Bear River beds, which are certainly 

 Cretaceous and even Upper Cretaceous, but not Laramie, as was once sup- 

 posed. Dr. C. A. AVhite and Dr. T. W. Stanton place the Bear River beds 

 between the Dakota and Colorado formations.* 



a Eighth Ann. Rep. U. S. Geol. Survey, Pt. II, 1S89, p. 870. 



6 On the Bear River formation, a series of strata hitherto known as Bear River Laramie, by Charles A. 

 White: Am. Jour. Sci., 3d ser.. Vol. XLIII, February, 1S92, pp. 91-97. The stratigraphic position of the Bear 

 River formation, bj' T. W. Stanton: Op. cit., pp. 98-115. 



