FIG. 1.

A Confocal image of medial-lateral cross section of the turtle utricle. Overlying the lateral surface of the utricle is a falx-shaped rigid structure referred to as the membranous falx (MF). The MF forms a semicircular membrane that is rigidly attached to the membranous utricle-sac walls (see Fig. 2B). The column filament and gelatinous layers are located between otoconial and epithelial layers. Hair cells are tagged red in this layer and can be seen in the striolar regions on left side of this figure. B Single frame of a osmium contrast enhanced micro-CT image of the turtle utricle shown in medial-lateral cross section. This figure shows the general structure of the overall membranous utricle and membranous falx location relative to other structures.