*Scaphites Cuvieri, xvii, 280.
*— reniformis, xxiii, 291.
Sepiadæ, colossal recent, remarks on, xlii, 335.
*Sigaretus bilix, xxiii, 344.
Snails, habits of, J. T. Plummer, xlviii, 93.
*Solarium elaboratum, xxiii, 344.
— cancellatum, xxiii, 344.
Solecurtus nitidus, xxxviii, 196.
Solemya borealis, Rhode Island, xxvi, 366.f
Solen siliqua, xxxii, 251.