I do not consider the presence in a single grave of two or more varieties sufficient proof of their common origin, for a number of distinct wares may come into the possession of one community through trade, conquest, or the spoliation of tombs; but a constant recurrence together of the same forms affords strong evidence that the objects were the work of the people with whom they were buried. Unfortunately our observations in the field are not sufficiently accurate to enable us to utilize associations or methods of occurrence in the graves as a means of classification. The following classification is, under the circumstances, the best that I can devise, and is of use mainly as a means of facilitating description. The name chosen generally indicates a leading or striking characteristic of the group. The _scarified_ group, separated widely from all other varieties. The _handled_ group and The _tripod_ group, apparently the work of one community and devoted to the same or similar uses. The _maroon_ group; The _red line_ group; The _white line_ group; The _lost color_ group; The _alligator_ group; and The _polychrome_ group, no two of which are sufficiently alike to make it certain, without extraneous evidence, that they were manufactured by the same community, yet all clearly belonging to one great family. These groups are presented in the order given. Before proceeding with the descriptions, however, there are some matters of a general nature that should be referred to. Technical questions have already received considerable attention, and I shall need only to refer here to the painted ornamentation, and at sufficient length to insure a clear understanding of its treatment and the scope of its subject matter. Painted vessels are embellished to some extent also by incising and modeling, and these methods are employed very much as in the unpainted pottery already described. Painted decoration is executed with much freedom and in many cases with considerable skill. It is greatly varied in method of treatment and embraces a wide range of motives. Geometric patterns occur in great variety, but are found to be of types peculiar to Isthmian America. The conventional meanders, frets, and scrolls so extensively employed in other regions are here almost unknown. Decorative motives derived from natural forms are abundant and afford an excellent opportunity to study the processes of conventional modification. These designs are often applied in a way to indicate that the decorator possessed a keen sense of the requirements of the vessel, although the treatment perhaps is not as universally satisfactory as is the treatment of plastic embellishment.