Notes on the Neir J^ossil, Daimonelix 3 



As to the mode of occurrence, it ought to be repeated that 

 the corkscrews occur on the Fine Ridge table lands, and stretch 

 iu area over four or live hundred square miles, as far as ex- 

 plored. In vertical range they extend through one hundred 

 and fifty or two hundred feet, or even more. The beds lie 

 chiefly in Sioux county, in the extreme northwest corner of 

 Nebraska. How far they extend to the east, or to the west in 

 Wyoming, is not determined. The Niobrara river is roughly 

 the southern limit, and the White river, the northern. They 

 have frequently been reported two hundred miles east of this 

 point, and one hundred and fifty to two hundred miles south. 

 The author has not as yet been able to prove or disprove the 

 statements of his informants, though holding them in doubt. 



It seems entirely evident that the Daimonelix beds are sedi- 

 mentary throughout. If aqueous, then the "accident," or the 

 rodent burrow, or the plant, was submerged, and difficulties 

 are at once met with. If aerial, as some deposits are, then the 

 rodent could burrow, it is true, but difficulties are encountered 

 again in the case of the plant which occupied the same bur- 

 rows, and which was apparently aquatic, resembling the red 

 sea- weeds more closely than anything else; judging from sec- 

 tions studied thus far. 



jAiMONELix Beds ■ ^ ' ,. : ?>-' • " s • ■ •• ■'(■■■' i'' ' ■ s'yf- ■ ■ ■ ^Sj'. ■ .'■ 



'?o TO, eo ri£TcRs.y;l^ -^ :i-^ .'.■■ -Ki- .■^:l^ [y^ ' • x"\V V/' "-■ \.\.'^ 



Sand-Rock'- •■ 

 ■xbo.To 300 METt^s 



Fig 1. — Diagrammatic section showing the Daimonelix Beds at Eagle Crag, 

 on Pine Ridge, near Harrison, Sioux Co., Nebraska. 



