Geology and Mineralogy. 263 
The size of the Table Mountain specimen, which is considerably 
worn by attrition in the gravel, is: length, 11 lines; breadth upon 
the crown, 9 lines; breadth at the base, 10 lines; thickness, ante- 
riorly, 4 lines, posteriorly, 2 lines. 
This fossil is the first of the kind discovered west of the 
Rocky Mountains. It adds to the list of the fauna of the period 
antedating ‘Table Mountain—a list which includes the mammoth 
(E£lephas, from Knight’s Ferry), the rhinoceros, and an animal 
allied to the elk.” I have believed that remains of man were also 
found under the lava; but upon this point, after diligent inquiry, 
Iam satisfied that the evidence is insufficient. But we now ad 
this fossil allied to Hipparion, and I regard it as another indica- 
tion that the Table Mountain beds are Pliocene, and homotaxial 
working downward, and in its contraction the upper edge or part. 
rate of actual motion but for uses,—and this is an 
amount of modifying intervention for the sake of the theory, suffi- 
cient to prove the theory of no value. He concludes as follows: 
“Tf I might presume to estimate net results of this renewed 
ually resume the vertical direction, and I had, perhaps too lightly, 
assumed that this was a particular instance of the process by 
