Colin Plant notes: The sacculus is convex in incarnatana, whereas in roborana it is concave just after the base. The outer edge of the cucullus is more or less straight in incarnatana whereas it is convex in roborana.
Colin Plant notes: The sacculus is convex in incarnatana, whereas in roborana it is concave just after the base. The outer edge of the cucullus is more or less straight in incarnatana whereas it is convex in roborana.