REPORT OP NATIONAL MUSEUM, 1924 81 



In Tennessee, in cooperation with the geological survey of that 

 State, he completed the mapping of the geology of the Hollow 

 Springs quadrangle and collected fossils from the Ordovician and 

 Mississippian formations outcropping in the area. At the instance 

 of Dr. Frank Springer, a visit was paid to southern Kentucky and 

 preliminary quarrying operations were undertaken with a view of 

 securing a series of crinoids, for which the locality is noted. In the 

 Ni agar an Plain and neighboring area in Ohio he obtained a more 

 complete knowledge of the region from which the Austin collection 

 was secured. The month of June, 1924, was spent by Doctor Bass- 

 ler, also under the auspices of the Geological Survey of Tennessee, 

 in the Lilydale quadrangle in the northern part of the State, map- 

 ping the geology of the region and securing data toward a report 

 on the stratigraphy of the State. 



Dr. E. O. Ulrich during the summer of 1923 was engaged in field 

 studies of the Upper Cambrian and Ozarkian systems, particularly 

 in Wisconsin. He spent the latter part of the fiscal year in the 

 marble belt of east Tennessee, the object of his researches being the 

 solution of intricate stratigraphic problems connected with the geol- 

 ogy of this classical area. 



In May, 1923, Charles W. Gilmore, curator of vertebrate paleon- 

 tology, was detailed for the work of securing a mountable skeleton 

 of the large sauropodous dinosaur from the Dinosaur National 

 Monument in Utah. In the work he was assisted by Norman H. 

 Boss. Work was begun on May 24 and carried on continuously un- 

 til August 8. The quarrying of these bones was a slow and tedious 

 operation, involving the skill of both the miner and the stonecutter, 

 but it was successfully carried out by the employment of experienced 

 men. The largest block quarried, containing the sacrum and at- 

 tached hip bones, weighed nearly 6,000 pounds when ready for ship- 

 ment. The transportation of the boxes to the railroad involved a 

 haul by teams of 150 miles across country and over a range of moun- 

 tains 9,100 feet above sea level. However, 34 large boxes having a 

 combined weight of over 25 tons, were safely transported. As noted 

 under the heading of accessions, the expedition resulted in the ac- 

 quisition of sufficient material for a good skeletal mount and a 

 considerable quantity of miscellaneous fossils representative of the 

 Morrison fauna. 



In September Mr. Gilmore visited the farm of F. C. Littleton, near 

 Aldie, Va., for the purpose of investigating the reported discovery 

 of fossil footprints in excavations in the red Triassic shale. Nu- 

 merous dinosaurian footprints were observed at several distinct hori- 

 zons. Later, through the courtesy of Mr. Littleton, Mr. Gilmore, 

 accompanied by Mr. Boss, again visited the locality and secured a 

 fine slab of these as well as a few separate tracks. 



