278 STANTON 



number of small lots from the "Lower Laramie." The largest of 

 these, from sec. 16, T. 24 N., R. 84 W., contains 



Unio couesi White 



Unio verrucosiformis Whitfield 



Unio sp. 



Campeloma muUilineata M. & H. 



Cassiopella turricida White 



At several other localities Tulotoma thompsoni White was collected 

 with the other gastropods of this list. This fresh-water fauna was 

 collected at but one locality mapped as "Upper Laramie." That 

 is in sec. 10, T. 23 N., R. 80 W., near the contact where "Upper 

 Laramie" is overlapping "Lower Laramie" and Lewis, making it 

 probable that the collector was in error as to the line between the 

 formations. 



Other localities in the "Upper Laramie" yielded Unio prisciis M. 

 & H., Unio sp., Viviparus raynoldsanus M. & H., and Campeloma 

 muUilineata, all of which occur in the Fort Union, though the last 

 named species is also widely distributed in the Laramie and " Cera- 

 tops beds." 



In this area Hatcher" has recorded the presence of " horned dino- 

 saurs and Hadrosauridae on the North Platte River opposite the mouth 

 of the Medicine Bow, about 35 miles below Fort Steele, Wyoming." 

 This locality is mapped by Veatch as "Lower Laramie" and it is only 

 about a mile from the place (sec. 16, T. 24 N., R. 84 W.) in the same 

 formation where the fresh-water shells above listed were obtained. 

 Mr. Veatch believes, however, that the dinosaurs were found in a bluff 

 of "Upper Laramie" about a mile and a half above the mouth of 

 Medicine Bow. His belief, it is said, is based on statements of a 

 resident of the region, that large fossils were once collected there. 

 The invertebrate fossils in the lower formation indicate to my mind 

 that the dinosaurs ought to be where Hatcher said he found them, 

 but the locality ought to be restudied.^" 



^'Am. Naturalist, Vol. XXX, 1896, p. 118. 



'" This is perhaps an appropriate place to record another reported occur- 

 rence of dinosaurs in a high horizon. Last year Mr. James H. Gardner 

 collected bones referred to Triceratops, Trachodon, Tyrannosaurus, etc., near 

 Ojo Alamo on Coal Creek, northwestern New Mexico, at a locality where Mr. 

 Barnum Brown had previously found dinosaurs. Mr. Gardner believes that 

 the bed from which he collected belongs to the Puerco and that it is several 



