| The amygdaloid body is an ovoid gray nuclear mass, oriented transversely and with a slight posterior concavity. |
| Instead, a very shallow longitudinal concavity is present along the midventral surface. |
| The labial surfaces of the plates are smooth, slightly convex both mesially and distally with a shallow concavity between. |
| Ben Tre finishes the work by hand, often coating the concavities with color or gold leaf. |
| These are broad concavities in the ambitus that could be considered precursors to the ambulacral notches of certain mellitids. |
| The shape of Taormina is a geometry of interlocking and contrapuntal curves and concavities with various centres and focal points. |
