Fig. 267[268] shows a _Fulgur_ shell specimen obtained by Major Powell from a mound near Nashville, Tenn. It was found near the head of a skeleton. Its substance is well preserved; the surface was once highly polished, but now is pitted by erosion and discolored by age. The design is engraved on the concave surface as usual, and the lines are accurately drawn and clearly cut. The central circle is three-eighths of an inch in diameter and is surrounded by a zone one-half an inch in width, which contains a triskelion or triquetrum of three voluted lines beginning near the center of the shell on the circumference of the inner circle of three small equidistant perforations, and sweeping outward spirally to the left as shown in the figure, making upward of half a revolution. These lines are somewhat wider and more deeply engraved than the other lines of the design. In some specimens they are so deeply cut as to penetrate the disk, producing crescent-shaped perforations. Two medium-sized perforations for suspension have been made near the inner margin of one of the bosses next the dotted zone; these show abrasion by the cord of suspension. These perforations, as well as the three near the center, have been bored mainly from the convex side of the disk. [Illustration: Fig. 268. SCALLOPED SHELL DISK FROM A MOUND NEAR NASHVILLE, TENN. Circles and dots and four spiral volutes (tetraskelion).] [Illustration: Fig. 269. SHELL DISK FROM BRAKEBILL MOUND, NEAR KNOXVILLE, TENN. Dot and circle in center and ogee Swastika (tetraskelion) marked but not completed.] [Illustration: Figs. 270 and 271. ENGRAVED SHELL DISK. Obverse and reverse. Three-armed volute (triskelion).] Fig. 268[269] represents a well-preserved disk with four volute arms forming the tetraskelion, and thus allied to the Swastika. The volutes (to the right) are deeply cut and for about one-third their length penetrate the shell, producing four crescent-shaped perforations which show on the opposite side. This specimen is from a stone grave near Nashville, Tenn., and the original is in the Peabody Museum. Fig. 269[270] shows a specimen from the Brakebill mound, near Knoxville, Tenn. It has a dot in the center, with a circle five-eighths of an inch in diameter. There are four volute arms which start from the opposite sides of this circle, and in their spiral form extend to the right across the field, increasing in size as they approach the periphery. This is an interesting specimen of the tetraskelion or spiral Swastika, in that it is unfinished, the outline having been cut in the shell sufficient to indicate the form, but not perfected. Figs. 270 and 271 show obverse and reverse sides of the same shell. It comes from one of the stone graves of Tennessee, and is thus described by Dr. Joseph Jones, of New Orleans,[271] as a specimen of the deposit and original condition of these objects: