viii, [9]-544 pp. Plates I-III and V-XXI [all published]. 25x15 cm (9¾x6") original blindstamped brown cloth, spine lettered in gilt.
Plate IV is described on p. 93 and p. 541, but was never published in this work. It may be found in the American Journal of Science, vol XLI. Plates VII and IX are printed on the same leaf. Presentation bookplate to the Portland Society of Natural History by bequest of William Wood, M.D. 1899.