J. J. Stevenson—Fox Hills Group of Colorado. 371 
were destroyed by an accident to the building where they were 
in Evans. During my last visit the leaf bed could not 
be found. 
These fossils can be procured between the Thompson and 
St. Vrain from a high knob near the Stone House, but localities 
are numerous both north and south from the Thompson, speci- 
mens having been obtained by me from both sides of that 
exposed on the St. Vrain at nearly three miles from the river. 
They resemble the higher sandstones in structure, and as far 
as examined proved to be non-fossiliferous. 
The relation of this enormous mass of sandstone to the coal 
1 base of the section. 
_ _ On the East side of the South Platte River.—In 1874, Dr. J. 
Innes made several borings in search of coal at about five 
: E : 
w 
Sandstone, moderately coarse, containing small ferruginous 
nodules with Halymenites major and shells; but only fragments 
of the latter were seen, sufficient, however, to show that they 
belong to characteristic species of the Fox Hills group. This 
ring was carried 268 feet and gave the following section: 
1, Sandestin oO ee ee 
4%. Carbonsoeots siale’-.. 22 3. 2 ese 
8. Yellow satitistdlie’ 2-2 oe ee 1 * 
4. Light shale = 20°”. 3 226 ees ee ee ce so * 
5. White sandstone 2: 622 es es a 
6; Bhie shale: ee if. = 
i. Blog eandstese seu oa ee a 16 
8. Alternations of sandstone and shale.... 92 “ 
Tete 6 a ed ec 28- * 
