FOSSIL PLANTS l6l 



magnificent form, with leaflets from 8 to 23 cm. in length. 

 It finds its greatest affinity with H. antiquora of the 

 lower Tertiary of the United States. 



The Ulmaceae are represented by several leaves that 

 are referred to Ulmus braunii of Heer, though not with- 

 out some hesitation. 



That the family Aceracese was present is shown by a 

 number of more or less broken leaves that have been re- 

 ferred to Acer trilobatum var. They are too fragmentary 

 to venture a positive identification. 



GEOLOGICAL ASPECT 



Of the twenty-six forms represented in the collection 

 nine are described as new to science, seven are not named 

 specifically, being branchlets, seeds, scales, broken cones, 

 etc., thus leaving ten species previously known. These 

 are as follows: 



Equisetum globulosum Lesq. 

 Sequoia heerii Lesq. 

 Taxodium distichum miocenum Heer. 

 Taxodium tinajorum Heer. 

 Juglans acuminata Al. Br. 

 Corylus macquarrii (Forbes) Heer. 

 Alnus corylifolia Lesq. 

 Ulmus braunii Heer. 

 Acer trilobatum var. 

 Andromeda grayana Heer. 



Equisetum globulosum was described originally from 

 Cook Inlet, Alaska, and was also detected by Lesquereux 

 in Fort Union beds near the mouth of the Yellowstone 

 River. Sequoia heerii was first found at Sage Creek ( ?), 

 Montana, in beds of doubtful Green River age. It has 

 since been found in the Upper Clarno formation (Upper 

 Eocene) at Bridge Creek, Oregon, and is now for the first 

 time reported from Alaska. Taxodium distichum mioce- 

 num enjoys a very wide distribution, but is especially 



