* Fossil species are indicated by an Asterisk
Arvicola ferrugineus, R. Harlan, x, 285.
— riparius, note on, J. T. Plummer, xlvi, 247.
*Basilosaurus of Harlan, xxvii, 354; xxxvii, 231.
*—, named Zygodon, R. Harlan, xli, 179. See beyond, [Zeuglodon.]
Bradypus tridactylus, remarks on a skeleton of, J. Wyman, xxxvi, 382.
*Chæropotamus, xxxvii, 231.
Crocodile, habits of, xxi, 163.
*Dicobune, xxxvii, 232.