Plate IX. 



Fio. 1 





:*^;^> vt:»,»: ^;'r>;-"7 



Fig. 2 



Fig.]. — A remarkable form of Daemonelix showine two ascendiner spirals, and numerous 

 processes or spurs of different shapes and sizes. The spurs vary in length from 

 5 cm. to 45 cm., the average being 15 or :;0 cm. In diameter they vary from 8 

 cm., the largest, through the average 4 or 5 cm. to about 8 mm. in the smallest. 

 The surface structure of the ends of these spurs is fairly well represented by 

 Figs. 4, 5, and 6, Plate XI. 

 Found and secured for the Morrill Expedition of 1895 by Mr. T. H. Marsland. Upper 

 Daemonelix beds near Squaw Canyon, Sioux Co., Neb. 



[From a Specimen in the Morrill Geological Collections. State Museum.] 



Fig. 2.— Scene in Daemonelix Beds near Squaw Canyon showing numerous Daemonelix in 

 place and students at work. The tubes which penetrate the sand rock in no- 

 ticeably vertical lines, and the so-called Daemonelix Sheets may be seen extend- 

 ing horizoutally juet above the students' beads. 



