tamales decorated with beans that form the pattern of a marine shell
cuatecuicuilli tamalli = "which are white and shaped like a ball but made not completely round or square. They have on top a seashell that is designed out of the beans that go into the mixture." This is in a section about the foods of the kings and lords.
See the hieroglyph of the name Cuatecuicuil in the Matrícula de Huexotzinco, folio. 745 recto, which is a phonetic rendering.