Annals of the South African Museum, Volume 28

African Museum angle anterior aperture appears articulation attached baini base Beds bone border Bradysaurus broad Broom closely collection concave convex coracoidal Cretaceous curved deep described developed digit directed distal distinct dorsal Durban edge elements elongate examples extends external facet fairly FAMILY Fauna femur figs figured folds foramen forms Fossils Genus Geol groove humerus ilium insertion internal known lateral left valve length less lower margin massive median moderately muscles narrow numerous oblique origin ornamentation outer pelvis placed plate pointed Pondoland portion postaxial posterior preaxial present preserved probably prominent proximal ribs ridge right valve rounded seen separated shaft shape shell short side skull slightly smaller South African species specimen spiral Stoliczka straight strong surface suture teeth text-fig third trochanter upper valve ventral whorls width Woods