United States Exploring Expedition During the Years 1838, 1839, 1840, 1841, 1842. Under the Command of Charles Wilkes, U.S.N. Volume XX. Herpetology. 499 pp. Originally published 1858. This Arno Reprint published 1978. With a folio atlas of b&w plates, [44 pp.] Both volumes bound in blue buckram.