Districts.
As space would be needlessly occupied by attempting to name each county, the area from which specimens have been obtained is, for convenience, divided into districts. These divisions are for use in this article only, and are not intended as archeologic districts.
In the tables given under each heading, the names of counties or districts show where the types described are obtained; the columns following show the number of specimens of each material mentioned in the collection of the Bureau.
Where a limited area only has been examined in any division, the name of the county is usually given; but where specimens of any kind have been obtained from different counties near one another, they are assigned to the district including those counties. The districts are as follows:
Arkansas.
Northeastern: Between White and Mississippi rivers.
Southeastern: Between White and Washita rivers from Clarendon to Arkadelphia.
Southwestern: West of Washita river and south of Arkadelphia, including Bowie and Red River counties, Texas.
Central: From Dardanelles southward and eastward to the above limits.
Alabama.
Northeastern: Bordering Tennessee river east of Decatur.
Northwestern: Bordering Tennessee river west of Decatur. Coosa: Bordering Coosa river southward to and including Dallas county.
Tuscaloosa: Bordering the Tuscaloosa and Little Tombigbee, and extending a short distance below their confluence.
Ohio.
Miami valley: The country along the two Miami rivers, including Shelby county on the north and Madison and Brown counties on the east.
Scioto valley: South of Franklin county, including Adams and Lawrence counties.
Central: Including Union, Knox, Perry, and Franklin counties, and the area within these limits.
Wisconsin.
Southwestern: The counties bordering on either side of Mississippi river from La Crosse to Dubuque (Iowa).
Eastern: The portion between Lake Michigan, Lake Winnebago, and the Illinois line.
Southern: Dane and adjoining counties.
Iowa.
Keokuk: The southeastern corner of the state and adjacent portions of Illinois and Missouri.
Tennessee.
Eastern: All the mountain district, with the extreme southwestern part of Virginia.
Western: From Mississippi river to and including the tier of counties east of the Tennessee.
Northern: The northern half of the interior portion.
Southern: The southern half of this portion.
South Carolina.
Northwestern: North and west of a line from Lancaster to Columbia. As no other portion of the state has been examined under direction of the Bureau, only the name of the state is used herein, reference being always to this section.
Georgia.
Northwestern: The portion northwest of the Chattahoochee.
Southwestern: Area contiguous to the lower Chattahoochee and Flint river.
Savannah: The vicinity of the city of Savannah, where a large collection was gathered.
Kentucky.
Northeastern: Between Kentucky, Big Sandy, and Ohio rivers.
Southeastern: From Estill and Cumberland counties to the Tennessee and Virginia state lines.
Central: Between Green and Ohio rivers, west of the last described districts.
Southern: From Green river southward and as far westward as Christian county.
Western: West of Green river and Christian county.
North Carolina.
Western: West of Charlotte.
Central: Between Charlotte and Raleigh.
Illinois.
Southwestern: From the mouth of the Cumberland to Washington county, and thence to the Mississippi.