While what is here written is drawn more especially from the paleography of Sikyatki,[1] it is true, likewise, of that represented in all the Tusayan ruins where yellow ware is abundant. I might instance examples from old Cuñopavi, Kisakobi or Old Walpi, and Old Micoñinovi. It does not, however, hold in all particulars when we study the red ware characteristic of the ruins along the Little Colorado river, where the feather takes another symbolic form not fully discussed in the present article. It applies to representations of the feather as depicted on altars now in use in Tusayan, symbols of feathers on dolls and ceremonial paraphernalia used by people who are lineal descendants of the inhabitants of the ruined pueblos mentioned above. The ruins of Sikyatki lie about three miles east of Walpi, and the pueblo of which they are the remains was destroyed previously to the middle of the sixteenth century. I have grouped all the striking modifications in bird and feather symbols in close approximation in an installation of the more instructive pieces of pottery from Sikyatki in the National Museum, at Washington, and the reader may there find a larger series illustrating ancient Hopi paleography than has ever before been displayed. A forthcoming report[2] of the Bureau of American Ethnology, under the auspices of which institution these objects were collected, will describe these variations in detail, and as this report is elaborately illustrated, the reader will soon have abundant published material from which to study modifications of the feather symbol in ancient Tusayan. We have no difficulty in recognizing among the many figures of animals which the ancient Hopi potter depicted on her wares the great group to which any one belongs. Four-legged animals of two kinds, frogs and lizards, are readily separated from mammals; apodal reptiles or snakes are easily distinguished from both, and there is no difficulty in separating the moth or butterfly from the spider or dragon-fly. The great group to which the animal depicted belongs is not difficult to discover, and from a large series of related designs one may trace quite readily the changes in form which have resulted in highly conventionalized modifications.