16 Erwin Hinckley Barbour 



PLATE VII. View of a fossil corkscrew at Eagle Crag, as it appeared 

 when partly dug out, with workman and judge of the county introduced 

 to give an idea of size. See also Plate I, near bottom. 



PLATE VIII. Figure 1 shows the surface structure of the Daimonelix 

 figured in Plate VII. Figures 2 and 3 show respectively longitudinal and 

 transverse sections of plant cells. 



PLATE IX. Fig. 1 — Large Daimonelix found weathered out. Fig. 2 — 

 A photo-micrograph of a section made from the same, showing cellular 

 structure. Fig. 3 — Another section from same, showing plant cells cut 

 longitudinally. Fig. 4 — A tubule, natural size, such as the whole surface 

 of all fossil corkscrews is composed of, from which the sections were made. 



PLATE X. Diamonelix, and student at work digging out the same, 

 as seen in the core of a blow-out near Eagle Crag. See also Plate XII. 



PLATE XI. Figs. 1 and 2 — Two views of the Diamonelix, shown in 

 Plate X, as it now appears in the State Museum. Fig. 3 — Cross section 

 of a tubule from the above. Fig. 4 — Longitudinal section of tubule from 

 the above. 



PLATE XII. A general view of the Diamonelix collection in the State 

 Museum, University of Nebraska. A full grown man is introduced in the 

 background to assist in judging of size. 



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