2 Erwin Hinckley Barhoiir 



exposures at and around Eagle Crag, two and a half miles 

 north of Harrison, Sioux county, also of those east and south 

 of the village. By vigorous work on the following day, one 

 large and excellent specimen was secured, and many others 

 were sketched and photographed. Further work was aban- 

 doned temporarily, to be resumed after visiting the Bad Lands 

 proper. 



The Daemonelix beds and their remarkable fossils are pecu- 

 liarly striking features of the region, and are well known to the 

 citizens of the country; and it seems inexplicable that these 

 "stone screws," "twisters" or " Devil's corkscrews" should 

 have escaped public notice so long. 



The name Daemonelix, accompanied by a brief description 

 with cuts, was proposed iw.Science, February 19, 1892. 



The data being insufficient for a more formal report, the author 

 found it advisable to visit this region again, from May 1st to 

 10th, 1892, and from the facts obtained a second paper fol- 

 lowed, On a New Order of Gigantic Fossils, in the Univer- 

 sity Studies of July, 1892. 



On June 20, 1892, the author was called upon to take charge 

 of the Morrill Geological Expeditions, founded and maintained 

 by the Hon. Charles H. Morrill, of Lincoln. With a large and 

 well equipped party the work of exploration was greatly facili- 

 tated, and a large amount of excellent material was secured, 

 warranting a third paper in the University Studies, July, 

 1894, under the title Additional Notes on the New Fossil, 

 Daemotielix — its Mode of Occurrence, its Gross and Minute 

 Structure. 



Although the author visited this region again in 1893, 

 and in August of 1894, yet work was discontinued there — 

 owing to press of engagements in other parts of the state — 

 till the summer of 1895, when he had at his disposal the 

 largest and most efficient party sent out as yet on the annual 

 Morrill expeditions. 



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