p. 1

Aceph [?]
Fan. Mactridoe [?]

Genus Aligena, [pencil notes P.3 p 500=Erycesinderm[?] H.C. Lea, Tr.
Am. Phil. Soc. (New sev.) [illegible, p 238 (1846)

Shell equivalve . ? sub=equilateral,
closed posteriorsly + auteriosly; hinge
with one cardinal tooth, and a
long shallow sulcation under the
beaks.