141 



existing groups ; while it is possible that flowers and fruits, could 

 they be found as they are in Baltic amber, would bring about 

 great changes in our conception of some of the Cretaceous 

 genera. 



The material containing the amber is a bluish-gray rock, full 

 of plant remains, in the immediate vicinity of the coal. We did 

 not find it in place, but were able to examine a large quantity 

 thrown out on the dump of a coal mine a short distance east of 

 Marshall. The principal plants in this rock were as follows^-* 



Slab containing fossil plants of Laramie age, Marshall, Colorado ; collected by 

 Miss Ruth DeLong and Mr. Ralph Morrill. A, C, Ficus navicularis Ckll. (vari- 

 able). B, " Plntanus^' rhornboidea Lx. D, ^^ Platanus^' i-aynoldsii'i^t'vihy. F, 

 Dombeyopsis obtusa Lx. ? ( Note the absence of coniferous remains in the specimen. ) 



1. Ficus gatidini Lx. {luicata Lx.), The large leaves are 

 abundant ; possibly much of the fossil wood so common at Mar- 

 shall may belong to this species, but we have made no sections. 



2. Phragmites laramianus n. sp.; P. oeningcnsis Lx., Tertiary 



* Since writing tlie above account, we have found quantities of amber in the coal 

 at Marshall. Much of it was looked over for insects, but so far without success. 

 None of the pieces is large. — April 26. 



