204 KNOWLTON 



Dammara? sp. 



Plalanus raynoldsii Newb. 



Platanus sp. 



Quercus sp. 



Car piles sp. 



From the same locality on Seven Mile Creek, "but lower and as- 

 sociated with a dinosaur skeleton (Claosaurus annectens Marsh)," 

 the following plants were collected by Brown: 



Sequoia heerii Lcsq. 



Taxodium distichum miocenum (Brongn.) Heer. 



Ginkgo adianioides (Ung.) Heer. 



Musophyllnjn sp. (probably new). 



Flahfllaria eocenica Lesq. 



Sal allies grayanus Lesq. 



Palmocarpon palmarum (Lesq.) Kn. 



Plalanus rJiomboidca Lesq. 



Plalanus sp. 



Ficus speclabilis Lesq. 



Viburnum sp. 



14. NORTHWARD EXTENSION OF WESTON COUNTY AREA CONNECTING 

 WITH THE MILES CITY AREA. 



It is now possible, through the work of Mr. E. S. Riggs of the 

 Field Museum of Natural History, to extend the known distribution 

 of the dinosaur-bearing beds to the northward of the Weston County 

 area, and make practical connection with the beds of similar age in 

 the Miles City, Montana, field. Mr. Riggs informs me that on 

 passing northward from New Castle, Wyoming, these beds were 

 first encountered on the head waters of the Little Missouri River 

 20 miles west of Devil's Tower. Again, on the east fork of Little 

 Powder River, in Montana, he found a weathered skeleton of Trachy- 

 don, partial skulls of Ccralopsia and fragments of a large carnivorous 

 dinosaur, probably a Tyrannosaurus. The formation was thence 

 traced along the east bank of Powder River from Powdcrvillc, Mon- 

 tana, to a point on Sheep Creek some miles northeast of Mizpah, 

 which brings it well within the area studied by Collier and Smith. 

 During the past season (1908) Mr. R. W. Stone of the U. S. Geolog- 

 ical Survey, found remains of Ccralopsia in the vicinity of Moore- 

 croft, Wyoming, which makes an additional j3oint connecting the 

 areas. 



