shell, in which most of the body of the animal is found Nuclear whorl(s)—small, generally smooth whorls formed within the egg, and constituting the apex of the shell Protoconch—a larval shell of a mollusc; also refers to protoconch whorls of an adult shell Teleoconch—all the whorls of a shell after the protoconch whorls Nepionic whorls : the whorls immediately following the embryonic whorls. References This article incorporates CC-BY-3.0 text from the reference. Further reading Solem A. (1983) "Lost or kept internal whorls: ordinal differences in land snails". Journal of Molluscan Studies 49(supp. 12A): 172–178. External links Mollusc shells