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Examples of variation in degree of dentation. (A) Depicts a high degree of dentation with many prominent, or arciform dentations. (B) Depicts a few arciform dentations. (C) Shows few, less prominent sinusoidal dentation. (D) Shows a hippocampus with no apparent dentation. Arrowheads indicate individual dentation. Dashed red lines illustrate the contour of arciform (A) and sinusoidal (C) dentation.
