Cymatium (Septa) intermedius (Pease, 1869b). (Synonym: Cymatium pileare (Linn.) Morris, 1966.) Length, 58 mm; diameter, 28 mm. Shell: fusiform-turreted, spire equal in length to the aperture and siphonal canal; with granular spiral threads and prominent varices; yellow-brown banded with white; aperture with short denticles; usually bifid; columella plicae white, interspaces black. Spire: protoconch of six broadly conical whorls, apical whorls sometimes with axial threads; spire moderately extended and acute; whorls convex, depressed apically; suture shallow. Sculpture: six or seven varices between which are three to five granular axial ribs of lesser diameter; varices and ribs crossed by granular spiral threads of varying diameter. Aperture: ovate, outer lip thickened and denticulate, denticles discrete, not extending into aperture; canal slightly twisted; columella and parietal wall strongly plicate. Color: variable yellow to brown, often banded with darker shades; aperture orange-red, denticles white; columella plicae white, stained with black in the interspaces. Periostracum thin and bristly. Animal: white blotched with tan and dark brown. These tritons are common in tide pools and on fringing reefs and have been dredged from depths of 30 m. They feed on bivalves such as Crassostrea, Ostrea, and Isognomon in the laboratory (Houbrick and Fretter, 1969, as C. pileare). C. inter- medius occurs in Pleistocene fossil deposits on Oahu and Molokai (Ostergaard, 1928, 1939). C. intermedius was described from the Hawaiian Islands but occurs elsewhere in the Pacific in the Philippines, and Guam, and in the Marshall, Line and Marquesas islands. This species is apparently much more common in Hawaii than in other Pacific localities, where C. aquatile and C. pileare are common.