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

Avicula undata, Hall, Pal. of N.Y. vol. 2 p. 283 pl. 59 fig. 2.

Subrhomboidal, oblique; left valve convex, much elevated in the middle, umbo prominent; surface marked by strong concentric striae and stronger undulations; posterior [voiney?] distinct,-extending nearly or quite as far as the posterior margin of the shell; anterior wing short, rounded at the extremity.

L. 0.8 -H 0.6

Middle Silurian-Niagara Shale

Rochester N.Y.

Byssoarca cuculloides, Conrad P 3-543

(Resembles the Parisian Area rudis, Depth?)

Eocene Tertiary

Byssoarca Lima Conrad, Proc. Ac. Nat. Sc. vol 3 p 295

Trapezoidal, cancellated, and granulated; radii largest on the anterior and posterior slops, but becoming obsolete towards the posterior extremity; end angular, margin above obliquely truncated; anterior end widely truncated, nearly direct; basal margin undulated, irregular and very variable in outline; hinge line crenulated under the beaks, profoundly toothed towards the extremities; cardinal area with lines strongly defined and angulated under the apex. L. 2.9

Eocene Tertiary Vicksburg Miss