NO. 1666. OSTEOLOGY OF CAMPTOSAVRVS—GlLMORE. ^99 



titles of Stcgosnurus and Camptosaurus bones. This quarry was entirely dif- 

 ferent from any other Jurassic quarry I have ever seen, tlie matrix being a 

 fine quality of sand. * * * There were also numerous small tubes with an 

 outer crust of calcite. These were nearly uniform in size and about one-half 

 inch in diameter. There were no large dinosaur bones found in this (luarry, 

 but it seemed to be a fav<u-ite resort for the smaller species. * * * ^he 

 quarry was cut through by two gulches, and that portion on the west side of 

 the west gulch was called 13 west, that part between the gulches was 13 east, 

 and that on the east side .of the east gulch was 13i. This is as I started the 

 work, and I believe Brown continued this plan. * * * j fl^jj jj^ ^y old 

 notebooks the original locations that were filed in 1879 in order to hold it from 

 trespassers. 



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 TO west, Albany Comity, 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 BroAvn assumed charge of the explo- 

 rations, which were continued uninterruptedly until the autumn of 

 1887, when the quarry was abandoned as exhausted. 



PLAN OF WORK. 



The fossils collected from quarry No. 13 prior to 1882 are now pre- 

 served in the collection of the Yale University Museum, while the 

 specimens resulting from the later excavations (the expense of col- 

 lecting having been defrayed by the U. S. Geological Survey) are 

 now in the paleontological collections of the U. S. National Museum. 

 Much of this material still remains in the original packages as col- 

 lected from twenty-one to twenty-six years ago. 



Rough sketch maps of the quarry were made by Reed, on which 

 he indicated the relative positions of all of the important bones found. 

 Unfortunatel}' 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 was divided (see fig'. 1) 

 into what he designated diagrams, beginning with No. 1 and ending 

 with No. 13. In some cases it is found that one diagram represented 

 a season's work, while in other instances several diagrams were 

 worked out in one year, probably due to the varying number of fossils 

 found in the different sections. The diagrams were subdivided into 

 2-foot squares and, the maps being platted on the scale of 2 feet to the 

 inch, bones as found could be accurately located on them. Each 

 bone or group of bones (when taken up in one block) was given a 

 quarry number, the bones found in each diagram beginning with num- 

 ber 1 and continuing serially for all of the specimens in that section. 



