the slip was applied and the clay became somewhat indurated, the surface was polished with smooth pebbles, the marks of which can be seen on the less accessible parts of the vessel. On the exposed surfaces of certain groups of ware the polish is in many cases so perfect that casual observers and inexperienced persons take it for a glaze. Incised figures and painted decorations were generally executed after the polishing was complete. Details of processes will be given as the various classes of ware pass under review. The methods of baking were apparently of a higher order than those practiced in many parts of America. One rarely discovers traces of the dark discolorations that result from primitive methods of baking, yet there are none of the contact marks that arise from the furnace firing of Spanish-American potters. _Color._--The colors of the ware and of the surface applications vary decidedly with the different groups. The prevailing colors of the paste may be defined as ranging from very light yellow grays to a variety of ochery yellows and very pale terra cotta reds. In one or two groups there is an approach to salmon and orange hues, and in another the color is black or dark brown. The color within the mass is in some cases darker than upon the surface, an effect produced in baking, and not through the use of different clays. The slip is usually lighter than the surface of the paste. The colors used in finishing and decorating are confined to reds, blacks, and purple grays. In one large group of ware the appearance of the delineations is such as to lead to the conclusion that the principal pigment or fluid employed in delineation has totally disappeared, carrying with it all underlying colors not of unusual permanence or not worked down with the polishing implement. The Aztec and other races of tropical America used an argillaceous, white pigment in decorating their wares, which has in many cases partially or wholly disappeared, carrying away considerable portions of the colors over which it was laid, while in other cases, and also in this Chiriqui ware, there is no trace of color remaining and we are left to surmise that the brush used probably contained merely a “taking out” medium. Red was profusely used and varies from a light vermilion to a deep maroon. In certain classes of vessels it was hastily daubed on, covering prominent parts of the surface or forming irregular spots, streaks, and rude figures. In two groups of ware it was used as the chief delineating color. In some cases it was employed as a wash or slip and was worked down with the polishing stone, and in this condition it was treated as a ground upon which to execute designs in other colors. It is always a fast color and is probably of mineral character.