. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. asg cac. nav cub. en cun. cc Clin. ms' am III. IV. Fig. D. — Left pes of dog, showing hallux fully developed, i, hallux; , astragalus; cac, calcaneum; cub., cuboid; ec'cun., ecto-cuneiform; en''cun., ento-cuneiform; ms'cun., meso-cunei- form; nav., navicular. fb * Fig. E. — Left pes of dog, showing duplicated hallux, i, rudimentary meta- tarsal of hallux; i«, i*, accessory digits; asg., astragalus; cac, calcaneum; cub., cuboid; ec'cwre., ecto-cuneiform; en'cu/i., ento-cuneiform; ms'cun., meso-cunei
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. asg cac. nav cub. en cun. cc Clin. ms' am III. IV. Fig. D. — Left pes of dog, showing hallux fully developed, i, hallux; , astragalus; cac, calcaneum; cub., cuboid; ec'cun., ecto-cuneiform; en''cun., ento-cuneiform; ms'cun., meso-cunei- form; nav., navicular. fb * Fig. E. — Left pes of dog, showing duplicated hallux, i, rudimentary meta- tarsal of hallux; i«, i*, accessory digits; asg., astragalus; cac, calcaneum; cub., cuboid; ec'cwre., ecto-cuneiform; en'cu/i., ento-cuneiform; ms'cun., meso-cunei- fonn; nav., navicular. IV. Polydactylism in the Fowl. Although the domestic hen is tetradactyle, the fifth digit was lost so early in phylogeny that it never appears in polydactyle abnormalities. As the hallux of the pes is reduced, however, polydactylism is entirely limited to this digit ; the condition is thus directly comparable to that VOL. XL. — NO. 6 2. 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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