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Pionodema globosa is truly Mimella. Holotype 8609 Length 19mm., Width 21.5mm., Hinge 13mm, Thickness 10mm. May be young of [[underlined]] Melonica. [[/underlined]] V.-Convex in posterior half, flattened anterior half, Cardinal extremities deflected dorsally. 12 costellae in 5 mm at front of middle of ventral valve.

Paratype - definitely ventral valve of Mimella. 12 costella in 5mm. Although P. globosa suggests M. melonica the ribbing is somewhat finer.

Pionodema miniscula - 8610 - Lebanon, Lebanon, Tenn. Small Length 12.5mm, width 13.5, thickness 6.5mm. Hinge 9mm. specimen looks like minature P. subaequata. V.-moderately convex in profile, sulcate in anterior 1/4. Sulcus narrow shallow. Ant. commesure[[guess]] faintly implicate.[[guess]] Dorsal about as convex as the ventral 20 in 5 mm. at front. Greatest width at middle.