266 The American Geologist. ^ay, 1903. 
is notably mottled, in part irregularly and in part in bands 
more or less horizontal, as though controlled by stratification, 
though the staining is probably secondary." 
10. In an offset tunnel at right angles to the original tun- 
nel, running eastward eleven feet from the place of the adult 
skeleton, the "silty formation has been slightly fissured along 
a number of lines by tensional action and the little crevices 
filled with a grayish- wh^te, soft deposit that effervesced very 
promptly with acid, implying calcium carbonate. Here "the 
vague structure lines dipped eastward irregularly." 
li. The definite clayey band found near the base in the 
tunnel pinches out toward the west in a few feet, and does 
not appear on the east side. It is "very homogeneous and pe- 
culiar, as well as very fresh and calcareous." 
12. Small fragments of "softened limestone" were so 
abundant in some parts of the walls of the open trench cut by 
Mr. Fowke that the walls presented a "mottling with white 
chalky spots made by the spade in mashing and spreading 
them." 
13. In the walls cut by the spade the main material is a 
silt "somewhat closely resembling loess," but containing frag- 
ments of limestone, and shale "and other debris incompatible 
with a typical loess deposit," without distinct stratification or 
assortment, but sometimes presenting "a gravelly aspect." 
14. A few drift pebbles and not a few pieces of charcoal 
were found in the section, also many land shells and additional 
bones were found by Mr. Fowke, but no unios. 
15. The unio found by Prof. Williston in the roof of the 
tunnel, though having its valves still united, was perhaps intro- 
duced through human agency, and is not a reliable evidence 
of a subaqueous, origin of the deposit. 
16. The deposit containing the skeleton is of limited ex- 
tent, formed by wash, "but not a stream deposit, nor a lake de- 
posit nor any other form of purely subaqueous deposition. I 
should identify it as a typical aggradation deposit of the ravine 
and basal slope type when the hillside environment was Car- 
boniferous limestone and shale mantled with loess." This 
idea is illustrated by fig. 13. (Fig. i. of this paper.) 
17. "The material of the one distinctly Avater-laid layer 
was probably derived from the Carboniferous shales at some 
