Bauxite in Arkansas. — Branner. 181 
I would here call attention to the small phase of Gryphcea pitch- 
eri which abounds alike in the Weatherford shell-conglomerate 
and in horizon No. 5, of the Belvidere section, and which T have 
elsewhere characterized as a pitcheri-like form tending more or less 
toward the aspect of G. incurva. It might quite as appropriately 
be described as a form of Gryphon incurva, tending more or less 
toward G. pitcheri. From the view that it is merely the young of 
G t pitcheri, there are strong reasons for dissenting ; for if it 
were, it would seem a strange circumstance that G. pitcheri should 
present to us only young in its lowest horizon in both Texas and 
Kansas, and chiefly adults in its higher horizons, associated with 
occasional small forms much more like said adults than like the 
small phase under discussion. I hold it to be a strongly marked 
type, an ancestral, or perhaps a physico-geographic form of G. 
pitcher!, of at least varietal value and of great importance as a 
kej- to stratigraphic relationships, and I would propose for it the 
name of Gryphcea pitcheri Mort. , var. hilli. 
The Cheyenne sandstone may be regarded as the much abbrevi- 
ated representative of the series of incoherent sandstones underly- 
ing the above-mentioned Weatherford shell-conglomerate, and out- 
cropping between Millsap and Weatherford in alternation with 
harder strata containing Pleurocera, Nerincea . and other forms to 
the most of which southern Kansas can show nothing similar. 
The upper and major portion of the basal stratum of friable fer- 
ruginous-yellow and white sandstone seen on Grindstone creek and 
its tributaries a little east of Millsap, resting upon the eroded 
Carboniferous — from the harder elements of which its basal con- 
glomerate portion is derived, — bears especial lithologic resem- 
blance to a very common phase of the Cheyenne sandstone. 
BAUXITE IN ARKANSAS. 
By John C. Bkannkk, Ph. 1>.. State Geologist of Arkansas. 
The geological survey of Arkansas has discovered deposits of 
bauxite in that state, the first considerable ones thus far found in 
this country. In 1887 a small deposit \v:is discovered in Floyd 
county, Georgia, but that is said to cover "an area of about half 
an acre" only.* 
*Trans. Am. Inst. M. E., XVI., p. 905. 
