fauces

noun

1. (plural, plural-normally)The narrow passage from the mouth to the pharynx, situated between the soft palate and the base of the tongue.
2. (plural, plural-normally)The throat of a calyx, corolla, etc.
3. (plural, plural-normally)That portion of the interior of a spiral shell which can be seen by looking into the aperture.

   “There are two orange-coloured spots at the fauces of that Cypræa Isabella, whence its name, orange-tip.”

   “Even at that early age the lamella in the fauces may be distinctly traced through the translucent shell.”

   “The tubercle is the same color but with white fauces. The glossy shell coloring is extremely various; the background is white, yellow or black, with or without longitudinal zigzag lines, transverse bands or blotches covering the surface.”