30 Erwin Hinckley Barbour 



of Geology in the University of Nebraska. A noticeable 

 feature was the fact that one fossil corkscrew was large, the 

 other small, as may better be seen by examination of Fig. 18, 

 and Plate VIII., Fig. 4. The smaller of the two may possibly 

 have been the older. The top whirl may have sent out a trans- 

 verse trunk, which eventually became a second screw. If this 

 is so, then possibly we have here our first complete corkscrew. 

 Later a specimen almost identically like this was found and 

 procured for the expedition by George R. Wieland, of Pennsyl- 

 vania State College, member of our expedition of 1895. 



Near this, but at a higher level, he found a large screw with 

 three transverse trunks. (Plate VIII., Fig. 3.) Near this 

 same spot a very interesting, if not a remarkable and anoma- 

 lous, form was found by Mr. T. H. Marsland, Professor of 

 Chemistry in Belmont School, California, member of the 

 Morrill Geological Expeditions of L892 and 1895. This was a 

 form with a spiral and axis, whose summit was surrounded by 

 a veritable crown of processes of various sizes and lengths. 

 (Fig. 19, Plate IX., Fig. 1.) 



Below this crown occurred other processes either fused to 

 the coils or standing out boldly from them. Several projected 

 from the sides of the transverse trunk, from the middle 

 of which rose a second small spiral without an axis. 



Perhaps it is difficult or altogether impossible to conceive of 

 such a plant. Still the characteristic tangle of fibres is there, 

 and splendidly shown in every part of this unique form, and 

 the microscope gives final evidence. Not content with eye de- 

 terminations, the author has cut sections from this specimen? 

 and from its larger and smaller spurs, all of which show its 

 plant structure. 



The whole region around Squaw Canyon must in former times 

 have been an unbroken forest of spirals, interlocked in all 

 directions by innumerable fibres. The loftiest beds at this place 

 showed us, in addition to extremes of contrast and variation, a 



110 



