*Mosasaurus, in United States, xvii, 289; xviii, 246; xxvii, 353.
Natrix torquata or common snake of Great Britain, incident regarding, xxxix, 186.
Ophisaurus ventralis, i, 262.
Pipa, description of genus, xi, 271.
*Plesiosaurus, xvii, 289.
*—, from North of Whitby, xxix, 364.
Proteus, of the North American lakes, S. L. Mitchill, iv, 181; vii, 68.f
—, generic character, vii, 67; xi, 284.
—, species of, vii, 68.f
— anguinus, xi, 284.