278 Field Columbian Museum — Reports, Vol. i. 



and Loup Fork ages. I was ably assisted in the work of collecting by 

 Mr. E. S. Riggs, and about three months were spent b}- the party in 

 the held. The work was conducted during the first seven weeks in 

 the Bad Lands of South Dakota, after which the "Corkscrew" beds 

 near Harrison, Nebraska, were visited. The party then explored the 

 escarpments of the Deep River beds near White Sulphur Springs, 

 Montana, and the remainder of the time available was spent in the 

 Hat Creek basin of Wyoming. While the material is as yet too 

 largely in the matrix to be accurately reported upon, the ex- 

 pedition may be characterized as remarkabh- successful. The 

 amount and quality of the material collected are such as amply to 

 repay for the outlay, and it was clearly demonstrated that the material 

 could be secured by collection in the field far more profitably than by 

 purchase. The quantity of material obtained for a given outlay was 

 larger. The work of collection was directed towards a needed kind 

 of material, and details of scientific value were noted which could 

 not be gained with a purchased collection. Among the specimens 

 secured were a nearly complete skeleton of Titanotherium, a large 

 skull, with jaws and thirteen vertebrae, three skulls and many miscel- 

 laneous bones of animals of the same genus: two skulls, jaws, and 

 leg bones of Aceratherium; a probably complete skeleton of Poebro- 

 therium ; a skull of Protoceras ; twenty-fives kulls, some with jaws, 

 and leg bones, of Leptauchenia, and about twenty-five skulls each 

 of species of Eporeodon and Oreodon ; a skull, jaws, vertebrae, and 

 leg bones of Cynodesmus; skulls and miscellaneous bones of Hyra- 

 codon, Mesohippus, Hyaenodon, Daph^enus, and Leptomeryx, and 

 representative bones of three genera of rodents. These specimens 

 will be cleaned and mounted during the winter months, and from 

 them it will soon be possible to make a creditable exhibit, as a begin- 

 ning of a collection of ancient vertebrates. Besides the main work of 

 the expedition, many auxiliary results of value were gained. From 

 the "Corkscrew" beds of western Nebraska five fine specimens of 

 the remarkable Daemonelix, or "devil's corkscrew," were secured. 

 These specimens have spirals three to eight feet in length, with 

 rhizomes attached. From the Fort Pierre beds of South Dakota a 

 choice collection of the richly-colored amber barite, golden calcite, 

 and chalcedony geodes, which occur in the concretions of these beds, 

 was obtained. About one hundred photographs illustrating geologic 

 and scenic features were taken, and about forty specimens of plants 

 showing the character of the flora of the region were collected. 

 During the stay of the party in South Dakota I visited the principal 

 mining camps in the vicinity of Deadwood, and obtained arepresenta- 



