. The descent of man : and selection in relation to sex . Evolution; Natural selection; Heredity; Human beings. N'-::':^. Fig. 31. Plecostomus barbatus. Upper figure, head of male; lower figure, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Darwin, Charles, 1809-1882. New York : Merrill and Baker

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Keywords: ., bookcentury1800, bookdecade1870, booksubjecthumanbeings, bookyear