. Bulletin - United States National Museum. Science. OSTEOLOGY OF THE ARMOKED DINOSAURIA. An inclosure in the above letter shows the quarry to have been located in the northeast quarter of section 5, township 22 north, of range 76 west, Albany County, Wyoming. Under the supervision of Mr. Reed, at that time employed by Prof. O. C. Marsh, Quarry No. 13 was worked for the remainder of the season of 1879 and during the summers of 1880, 1881, and 1882. In 1883 further excavations were made under the direction of Mr. J. L. Kenney, and in 1884, Mr. Fred Brown as- sumed charge of the explorations, wh
. Bulletin - United States National Museum. Science. OSTEOLOGY OF THE ARMOKED DINOSAURIA. An inclosure in the above letter shows the quarry to have been located in the northeast quarter of section 5, township 22 north, of range 76 west, Albany County, Wyoming. Under the supervision of Mr. Reed, at that time employed by Prof. O. C. Marsh, Quarry No. 13 was worked for the remainder of the season of 1879 and during the summers of 1880, 1881, and 1882. In 1883 further excavations were made under the direction of Mr. J. L. Kenney, and in 1884, Mr. Fred Brown as- sumed charge of the explorations, which were continued uninterruptedly imtil the autunm of 1887, when the quarry was abandoned as exhausted. The fossils in Quarry 13 were found in a stratum of sandy clay, as I have de- termined from the matrix still adhering to the bones, and as indicated in the sec- tion (fig. 1) made by Brown. This layer is intercalated between bands of marl or clay, green below and brownish above, all three lying between layers of sand- stone. All are tilted at a considerable angle from the horizontal. The correla- tion of this layer with other fossil horizons in this region of Wyoming is discussed in a previous arti- cle on the Osteol- ogy of Campto- saurus, etc' Plan of tvork.— The fossils collect- ed from Quarry No. 13 prior to 1882 are now pre- served in the col- lection of the Yale ^'°' 1~^'^<^^'°'* °^ quarry is. made by Mk. Fred brown m 1884. University Museum, while the specimens resulting from the later excavations (the expense of collecting having been defrayed by the United States Geological Survey) are in the paleontological collections of the United States National Museum. Rough sketch maps of the quarry were made by Reed, on which he indicated the relative positions of all of the important bones found. Unfortunately only a few of these are now available. Later Brown formulated a more detailed plan of recording the relative positions of the specimens uncovered. The quarry w
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