Box 26, Folder 1: Paleontology Draft 7: AcePhala I

Amphidesma subonliqua Cons. Sill Jour?

Medial Tertiary

Wilmington N. Car.

Amphidesma subovata, Say, Jour. Ac. Nat. Sc. vol. 4 p 152 pl 10 fig 10; Conrad Med. Ter. Foss. p 36

[Amphidesma subovata

Shell ovate-oval, compressed, with somewhat prominent and regular concentric striae; beaks rather posterior to the middle; posterior submargin with an obsolete obtuse undulation; lunule lanceolate; cardinal and lateral teeth prominent.

A. subovata, Say. Jour. Acad, Nat. Sc., vol. iv. p. 152, pl. x. fig. 6.

Locality. St. Mary's county, Maryland?]

L. 1.0 H 0.7

Medial Tertiary

St Mary's County Md?

Amphidesma subreflexa, Conrad Jour ac. Nat. Sc. vol 7 p 133 Med. Tert. Foss p. 37 pl 19 fig 6.

[Amphidesma subreflexa-Plate XIX, Fig. 6.

Shell elliptical; anterior side narrowed, produced, rounded at tip, the dorsal line rectilinear; posterior side very short, with a rather acute fold, the extremity narrow, but obtuse; lateral teeth in the right valve; in the left, none.

A. subreflexa, nob. Jour. Acad. Nat. Sc., vol. vii. p. 133. Locality. Yorktown, Va.]

L. 0.7 H 0.4 Medial Tertiary Yorktown Va.

Amphidesma tellinula, Conrad, Am. Jour. Sc. 2d Ser. vol. 1 P. 397 pl. 4 fig. 5

Subovatte or subtriangular, thin ventricose, dorsal margins very oblique, the posterior one rectilinear; posterior side narrower and rather shorter than the anterior, extremity truncated and very much above the line of the base; basal margin profoundly rounded; cardinal tooth double fosset small; lateral teeth obsolete.

-The fosset of the hinge is shorter than is usual in this genus, and much less oblique or more direct; the tooth which is anterior to the fosset is double, and before it there is a minute pit; posteriorly the hinge has a narrow elliptical depression or lunule which gives the shell the