Walls and enclosures are of rare occurrence in this region.

(3) The Ohio district, including the State of Ohio, the western part of West Virginia, and the eastern portion of Indiana. Although the works of this region present some features which are common to those of the Gulf section, there are several peculiar characteristics which warrant us in designating it as a distinct district. Among other of these peculiar features we notice the great circles and squares of the enclosures, the long parallel lines of earthen walls, the so-called "altar mounds," or mounds containing structures chiefly of clay to which the name "altar" has been applied; the numerous carved stone pipes; the character of the pottery and the methods of burial.

(4) The New York district, confined chiefly to the northern and western parts of the State of New York, but including also the lake region of the central portion.

As the antiquities of this district have been shown by Squier to be chiefly due to the Indian tribes occupying that section at the time of its discovery by the Europeans, it is unnecessary to note the distinguishing characteristics. The works are chiefly enclosing walls, remains of palisades, and burial mounds.

(5) The Appalachian district, including western North Carolina, eastern Tennessee, southwestern Virginia, and part of southeastern Kentucky.

The characteristics which appear to warrant us in concluding that the works of this region pertain to a different people from those in the other districts, at the same time seem to show some relation to those of the Ohio district. Such are the numerous stone pipes, the altar-like structures found in some of the mounds, and the presence of mica plates with the skeletons. But the peculiar features are the mode of burial, the absence of pottery, and the numerous polished celts and engraved shells found in the mounds.

Although it is probable that there are at least three districts in the southern portion of the United States, they appear to pass from one into the other by such slight changes in the character of the works as to render it exceedingly difficult to fix the boundaries between them. I therefore mention the following, provisionally, as being those indicated by the data so far obtained.

(6) The Middle Mississippi area or Tennessee district, including southeast Missouri, northern Arkansas, middle and western Tennessee, southern and western Kentucky, and southern Illinois. The works of the Wabash valley possibly belong also to this district, but the data obtained in regard to them are not sufficient to decide this point satisfactorily. This district, like the others of the south, is distinguished from the northern section by its larger mounds, many of which are pyramidal and truncated and often terraced, and which were, beyond question, used as domiciliary mounds. Here we also meet with repeated examples of enclosures though essentially different from those of Ohio; also ditches and canals. From the Lower Mississippi and Gulf districts, with which, as we have said, it is closely allied, it is distinguished chiefly by the presence of the box-shaped stone cists or coffins, by the small circular house-sites or hut-rings, and by the character of the pottery. This is pre-eminently the pottery region, the typical forms being the long-necked, gourd-shaped vase and the image-vessels. In this district the carved stone pipes are much less common than in the Illinois, Ohio, and Appalachian districts.

(7) The Lower Mississippi district, including the southern half of Arkansas, Louisiana, and Mississippi. There are no marked characteristics by which to distinguish it from the Middle district; in fact as we move southward along the Mississippi from the mouth of the Illinois river, the works and their contents indicate a succession of tribes differing but slightly in habits, customs, and modes of life, the river generally forming one natural boundary between them, but the other boundaries being arbitrary. For example, the Cahokia region appears to have been the home of a tribe from which at one time a colony pushed northward and settled for a while in Brown and Pike Counties, Illinois. The extreme southeastern counties of Missouri were probably the seat of another populous tribe which extended its borders into the western part of southern Illinois and slightly into northeast Arkansas, and closely resembled in customs and art the ancient people who occupied that part of the Cumberland valley in middle Tennessee. This subsection is principally distinguished by the presence of the small circular house-sites, which are slightly basin-shaped, with a low ring of earth around them. As we move farther southward into Arkansas the house-sites change into low circular mounds, usually from 1 to 3 feet in height, and in nearly every instance containing a layer of clay (often burned) and ashes.

These small mounds, which are clearly shown to have been house-sites, were also burial places. It appears to have been a very common custom in this section to bury the dead in the floor, burn the dwelling over them, and cover the whole with dirt, the last operation often taking place while the embers were yet smouldering. Burial in graves was also practiced to a considerable extent. As we approach the Arkansas River, moving southward and from thence into Louisiana, the pottery shows a decided improvement in character and ornamentation.