 A complete legend and fonts for the notation (see samples) are open source and available from the Plainsound Music Edition website.For example, the Pythagorean major third on C is C-E while the just major third is C-E↓ (see Fig.4 for "combined" symbol)

Sagittal notation (from Latin "sagitta", "arrow") is a system of arrow-like accidentals that indicate prime-number comma alterations to tones in a Pythagorean series.