J. J. Stevenson—Laramie Group of Southern Colorado. 183 
of the Great Sandstone at the top of the section; but animal 
remains are rare. Some fish-teeth were obtained from the 
Relation of the Laramie to the Middle Cretaceous, 
Throughout this southern coal-field the Lamarie rocks rest on 
the shales of the Fort Pierre sub-group, the Cretaceous, No. 4 
of Mr. Meek’s original section. These contain Ammonites pla- 
centa, Baculites ovatus, Inoceramus convexus, and other thor- 
oughly characteristic species. The Fox Hills group, the No. 5 
of Mr. Meek’s section, appears to be wanting here. It cer- 
tainly is wanting if the Halymenites sandstone 1s to be included 
in the Laramie group. : 
Lithologically, the transition from the Fort Pierre to the 
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