Box 26, Folder 3: Paleontology Notes 7: Acephala: 3

Lucina alveata, Conrad, Ter. Foss Lucina lunata, Lea, Cont. p 58 pl 1 fig 32

Shell anteriorly oblique, inequilateral, inflated, concentrically striated and furrowed; substance of the shell thick; lunule broadly cordate; beaks elevated, recurved; cardinal and lateral teeth rounded; cicatriced not deeply impressed; the lines of growth numerous and deeply furrowed, causing a crescent like appearance; cavity of the shell deep, of the beaks deep and rounded, having no visible furrow; margin entire.

L. 0.2 H 0.3 D 0.2

Eocene Tertiary Claiborne Alab.

Lucina anodonta, Say. Jour. Ac. Nat. Sc. Vol 4 p 146 pl 10 fig 9; Conrad, Med. Ter. Foss, p 39 pl 20 fig 4

Lucina anodonta. -- Plate XX., Fig. 4.

Shell suborbicular, compressed, becoming very thick with age; surface with coarse lines of growth; anterior fold double; lunule short, profound; teeth none; cartilage area very broad; cavity of the umbo very shallow, with a groove and carina extending to the posterior muscular impression.

L. 1.8 H. 1.8 Medial Tertiary

Near City point & Urbana, Va.; near Easton & Patuxent river Md. Wilmington N Car.

Lucina carinifera, Conrad, Test. Foss. Lucina cornuta, Lea, Cont. to Geol. p 56 pl 1 fig 29.

Shell orbicular, ventricose inequilateral; concentrically striate, angular before folded and emarginate behind; substance of the shell thick; lunule impressed, being bounded by a ridge; beaks elevated, pointed, recurved; anterior lateral tooth nearly round, equidistant between the beak and angle; posterior lateral tooth somewhat compressed, equidistant between the beak and fold; the two great cicatrices raised and very perceptible, the anterior one long; lines of growth three or four, and very marked; cavity of the shell deep and rounded having an impressed furrow across the cntre; margin entire. L. 0.45 H 0.45

Eocene Tertiary Claiborne Ala.

[Sketch-Lucina cornuta].

Lucina carinifera, Conrad, Ter. Foss. p. 40, Am. Jour. Sc. 2 Ser. Vol. 1, p. 402, pl 4 fig 15. L. cornuta Lea, Con. to Geol. pl. 1 fig. 29.

Suborbicular, profoundly venticose, with concentric acute stria; anterior side with a slightly impressed fold, & the superior margin with a short rostrum or prominent angle; posterior side with a narrow profoundly impressed fold, emarginate at base; summit very prominent, submedial; beaks incurved; cardinal and lateral teeth distinct; inner margin crenulated.

L. 0.5 -- H. 0.5