Ramey-Incised decorated rim sherds (curvilinear designs perhaps symbolizing water or the water world?) reportedly from the Cahokia site.

Dick, G. C., 1955 Incised Pottery Decorations from Cahokia, A Middle Mississippi Site in Western Illinois. Missouri Archaeologist 17(4):36-48. Fig. 10, p. 43

Image courtesy of Missouri Archaeologist.