The cross with the arms bent or twisted in a spiral is one of these related forms. It is certain that in ancient, if not prehistoric, times the cross with extended spiral arms was frequently employed. This form appeared in intimate association with the square Swastikas which were turned indifferently to the right and left. This association of different yet related forms was so intimate, and they were used so indiscriminately as to justify the contention that the maker or designer recognized or admitted no perceptible or substantial difference between the square and spiral forms, whether they turned to the right or left, or whether they made a single or many turns, and that he classed them as the same sign or its equivalent. A Greek vase (fig. 174) shows five Swastikas, four of which are of different form (fig. 262). Curiously enough, the design of this Greek vase is painted maroon on a yellow ground, the style generally adopted in the vases from the mounds of Missouri and Arkansas, which mostly represent the spiral Swastika. [Illustration: Fig. 262. DIFFERENT FORMS OF SWASTIKA FOR COMPARISON.] In Ireland a standing stone (fig. 215) has two forms of Swastika side by side. In one the arms are bent square at the corners, the other has curved or spiral arms, both turned to the right. These examples are so numerous that they would seem convincing in the absence of any other evidence (figs. 166 to 176). ABORIGINAL AMERICAN ENGRAVINGS AND PAINTINGS. These allied forms of Swastika appear on prehistoric objects from mounds and Indian graves in different parts of the country and in times of high antiquity as well as among modern tribes. This paper contains the results of the investigations in this direction. DESIGNS ON SHELL. [Illustration: Fig. 263. SHELL GORGET. Cross, circle, sun's rays(?), and heads of four ivory-billed woodpeckers(?) arranged to form a Swastika. Mississippi.]