A(,i: OF THE ARAPAHOE AND DENVER, 241 



At the top of the exposure above these fresh-water beds thore is a band <>f 

 brackish-water fossils, reported by both Meek and llayden and by Gope, which con 

 tain Osttrea subtrigonalix, Aiioniin sp. Corbicula occidentalis, Corbula cytheriformis, 

 Goniobasis eonvexa, etc. This band was not seen by me in the neighborhood of Juditb 

 I liver, but I afterwards saw it near Havre, Mont., holding the same position above 

 the fresh-water beds. 



These brackish-water shells arc specifically identical with those found 

 by Mr. Weed in the Livingston beds; hence they do not indicate the 

 Laramie age of the Judith River beds. The same considerations concern- 

 ing apparent conformity with the Fox Hills which wen- urged in discussing 

 the Converse County beds apply to the Judith River beds, and it seems 

 to the writer that they arc not shown to be typical Laramie by the evidence 

 ;it present available. 



Dinosaur-bearing beds near Castle Gate, Utah. In flic Slliniller < if 1894 Ml'. T. W. 



Stanton found bones of a dinosaur near Castle Gate, Utah, in sandstones 

 occurring- above the Laramie coal beds of that region and below the 

 Wasatch strata of the plateau. The remains in question were submitted 

 to Prof. 0. C. Marsh, who identified them as belonging to Claosaurus 

 annectens Marsh, first found in the Ceratops beds of Converse County, 

 Wyo., and afterwards identified in the Arapahoe strata, near Denver. 

 It is therefore of much interest to compare the Utah section with the others 

 in which the same dinosaur has been found. Mr. Stanton has kindly 

 offered the following notes upon the Upper Cretaceous section of Price 

 River Canyon, near Castle Gate, and of the series up to the undoubted 

 Wasatch Eocene: 



The lowest beds exposed in this neighborhood are dark clay shales, with 

 occasional bands of sandstone, in which a few specimens of Tnoceramus proximus, 

 which is characteristic of the Montana formation, have been found. Farther south- 

 west, in Castle Valley, a much lower horizon in the same series of dark shales 

 yields Prionocyclus wyomingensis, Scaphites warreni, Tnoceramus dimidius, and other 

 characteristic fossils ol the Colorado formation. 



Above the horizon at which Tnoceramus proximus was found the strata consist 

 of alternations of shale and irregular, heavy beds of brown and gray sandstones, 

 the latter greatly predominating and forming probably four-fifths of the entire 

 thickness of 500 feet up to the principal Castle (late coal bed. About 200 feet below 

 the coal there is a fossiliferous band of shale in which a few brackish water Laramie 

 mon xxvii 16 



