Glossary of Morphological and Anatomical Terms
jugal processes - Pair of discrete, ventromedially directed lamellae arising from primary lamellae ofspiralia.
jugal stem - Ventroposteriorly directed continuation of jugum which, by bifurcation, may give rise to accessory lamellae posteriorly.Fig.336.
jugum - Medially placed structure of secondary shellconnecting two primary lamellae of spiralia also junction between descending lamellae in loop ofCryptacanthia.Fig.336.
