“…While Doric (1909) reported the presence of only cholesterol in Buccinum undatum, Bock & Wetter (1938) demonstrated that also 7-dehydrocholesterol was present (making up even 27.5 per cent of the total sterols). Cholesterol is also the principal sterol of Buccinum perryi (Toyama & Tanaka, 1956) and Hemifusus ternatanus (Toyama et al, 1955a). In Nassa obsoleta clionasterol was observed beside cholesterol (Kind et al, 1948;Kind & Goldberg, 1953).…”