“…Neogastropoda. No or hardly any radioactivity from [l-14 C]acetate was incorporated into the sterols of Buccinum undatum, N. antiqua, Purpura lapillus, and M. brandaris (Voogt, 1967b(Voogt, , 1972b. However, modification of the dietary sterols, as discussed already (Collignon-Thiennot et al, 1973), would suffice to explain the observed differences in sterol patterns.…”