Rhombus triacanthus, xlv, 278.

Salmo, remarks on the genus, L. Agassiz, xxviii, 76.

*Saurocephalus, of R. Harlan, xxvii, 353.

*—, a fish, R. Owen, xxxix, 203.

*Shark, xvii, 289.

*Fossil shark's teeth of New Jersey, xxviii, 378.

Spinax acanthias, xlv, 283.

Squalus, remarks on some species of, J. E. DeKay, xv, 359.

Stilbe chrysoleucus of DeKay, the Leuciscus chrysoleucus of Storer, xlv, 279.

Sturgeon, spoonbill, of the Ohio, notice of, xii, 201.f