Washington, A. O. P. Nicholson: xi + 339. Illus.

–See also Herndon (1853). On the Madeira River between Crato and Porto de Mataurá, Oct. 12, 1852 (p. 309): {"We are told the fish called 'peixe boi,' (bull-fish,) of the Madeira, is the same as the 'vaca-marina,' (sea-cow,) of the Ucayali, though comparatively there are few taken."}