narial

The anterior narial aperture in the skull opens upwards, but the orifices of the nostrils are placed at the end of the muzzle.

The posterior narial openings lie comparatively far forward between the anterior extremities of the palatines.

The internal or nasal surface, like that of the premaxillae, is excavated by a deep longitudinal groove, the narial passage.

The anterior narial opening lies at the anterior end of the skull, and is bounded by the premaxillae and nasals.

The anterior narial aperture (fig. 97, 8) is wide and directed upwards, opening high on the anterior surface of the skull.