. Bulletin of the American Museum of Natural History. Natural history; Science. 17 Jt 19 2,0 £1 females 12 13 14 15 16. 11 '2 13 1^ 15 1£ 17 IS 19 £0 2r Width of mandible in millimeters Fig. 4. Variation of mandibular width in the three species of Pyrenestes. The sexes are separated, black polygons indicating males. Note the bimodal or polymodal nature of the polygons, showing that the populations are mixed. 421. 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 p
. Bulletin of the American Museum of Natural History. Natural history; Science. 17 Jt 19 2,0 £1 females 12 13 14 15 16. 11 '2 13 1^ 15 1£ 17 IS 19 £0 2r Width of mandible in millimeters Fig. 4. Variation of mandibular width in the three species of Pyrenestes. The sexes are separated, black polygons indicating males. Note the bimodal or polymodal nature of the polygons, showing that the populations are mixed. 421. 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 Allen, J. A. (Joel Asaph), 1838-1921; American Museum of Natural History. New York : [American Museum of Natural History]
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Keywords: ., bookcentury1800, booksubjectnaturalhistory, booksubjectscience
