Mitræ vulpecula, plicata, &c.
Obs. Shell generally longitudinally plaited, equally fusiform; outer lip smooth, slightly waved; top of the inner lip much thickened within; throat striated.
III. Aperture above pointed, below narrowed, externally curved.
Voluta mitra-abbatis. Chemnitz, &c.
Obs. Shell generally with an elongated spire, the aperture below narrowed; upper syphon or channel small or wanting.
III. Aperture above pointed, externally straight, below rounded, widened or effuse.
Mitræ papalis, episcopalis, &c.
Obs. Shell generally smooth, the base thick and truncated; margin of the outer lip crenated; throat smooth. The smaller shells of this division connect the genera Mitra and Colombella (Lamarck).