Authority Lightfoot, 1786 in MacDonald & Co, 1979 [details]
Possibly the authority should be (de Ferussac, 1822) [details]
Authority (Gmelin, 1791) in Drivas & Jay, 1988 [details]
Solid, ovate shell, up to 4 cm, with a broad, flat base. Rounded lump at each extremity above siphonal and anal ... [details]
Tropical Indo-Pacific, also in Australia in Kalk (1958). [details]
The largest of all helmet shells, ;up to 35 cm. A very solid, heavy, rotund shell with large, horn-like knobs and ... [details]
Habitat: rocky shores Shell up to 4 cm, with a single row of nodules and two or more rows of tiny beads on whorls. ... [details]
Shell up to 7 cm, with low spire and nodular whorls. Colour creamy brown, patterned with fine, tiny, darker spots. ... [details]
Resembels C. lividus, but with flatter spire, overall colouration paler and a darker, purple base (Richmond, 1997). [details]
Highly dangerous - live specimens should be handled with extreme caution. Broad, thin shell, up to 15 cm, with wide ... [details]
A thick shell, up to 10 cm, with flat but nodular spire and and shoulders. Colour cream with many bands of dark ... [details]
Shell up to 10 cm, with flattish, nodular spire and with an outer lip which flares towards posterior. Distinctive, ... [details]
Small, bulbous shell, up to 4 cm, generally covered with a calcareous deposit. Body whorl with numerous fine, ... [details]
Tropical Indo-Pacific, also in Australia in Kalk (1958). [details]
The shell is a distinctive, large "bubble", up to 5 cm long, with wavy, brown to black lines. The animal is ... [details]
Shell up to 4 cm, with angled whorls and a slightly extended apex. The base is flatter and less rounded than in J. ... [details]
Tropical Indo-Pacific, also in Australia in Kalk (1958). [details]
Solid, ovate to pear-shaped shell, up to 12 cm. Exterior white, interior reddish-brown, operculum velvet black ... [details]
Large, thick shell, up to 10 cm, with large body whorl, very expanded aperture and a short, blunt spire. Surface ... [details]
Small, flat, rounded, ear-shaped shell, up to 1 cm long, resembling Haliotis, but without perforations, small ... [details]
Habitat: rocky shores. Tropical Indo-Pacific in Kalk (1958). [details]
Up to 8cm long. Distinguished by its often silt-covered, cap-like external shell surrounded by an orange-tinted ... [details]
Distribution: West Africa; all records from the Indian Ocean are doubtful according to Dautzenberg, 1929 [details]
Described in 1791 according to Drivas & Jay, 1988 [details]
Year of description 1922 in Drivas & Jay, 1988 [details]
Described by Bavay according to Dautzenberg, 1923 [details]
subgenus Atactodea Dall, 1895. M. striata in Vine, 1986 [details]
subgenus Strigatella (Dautzenberg, 1923) [details]
Subgenus (Priotrochus) (Macnae & Kalk,1958). M. obscurus in MacNae & Kalk, 1958. [details]