Casmaria erinaceus kalosmodix (Melvill, 1883). Length, 74 mm; diameter, 45 mm. Shell: elongate, solid, glossy; smooth or noduled at the shoulder; with small denticles at the base of the varixed outer lip; white with axially oriented brown blotches below the suture, varix banded brown and white. Spire: protoconch of three whorls; teleoconch of five inflated whorls; suture linear. Sculpture: smooth or strongly noduled at the shoulder. Aperture: columella with four or five wrinkles; base of outer lip with four to six small denticles. Color: white, cream, or tan with dark brown axially oriented rectangular blotches and darker square spots on the varix; aperture violet in live-collected shells, brownish in older shells. These cassids are found at moderate depths in sand. Shells from Midway to Necker are of unusually large size, reaching lengths of 103 mm and are progressively smaller southeast among the windward islands (Abbott, 1968). Ostergaard (1928) reports shells from Pleistocene deposits on Oahu which may represent this species. C. erinaceus ranges through the Indo-West Pacific from the east coast of Africa into the Pacific. Abbott (1968) recognizes three subspecies, C. e. erinaceus in the Red Sea and East Africa, Melanesia and Micronesia; C. e. kalosmodix in Polynesia and Hawaii, and C. e. vibexmexicana on the west coast of the Americas. This cassid is distinguished from C. ponderosa by its more elongate shape, les globose whorls, the restriction of the denticles on the outer lip to the basal portion of the lip, and its lack of square brown spots both on the base of the last whorl and just below the suture, characteristic of C. ponderosa.