Cnrad Amicula demissa p. 242 Fig. 3. New Rome Oneida County, N.Y. [illegible] Atyha calva p. 264 Poriumma andrea in Siluria shale Fig. 21 Cnrad. (29) p. 260, Strphalua maenta, Triangular, larger than wide; slightly winged; inferior valve with the sown for an a disk flattened it towards th true; mddely and concentri- cally but twards th upper value; concentrically wrrkly radii distinct, rather remote with three or four anniate in the mediate lines; two projecting and angular at the middle locality. New Rome, Oneida County, N.Y., This species resembles 3. alt maenta and 3. Del upper and having more two of the central lines larger than the rest, but it is a much flatter and proportionally larger shell.