. Comparative physiology of vertebrate respiration. Vertebrates -- Respiration; Physiology, Comparative. Fig. 12. Diagrams of the lungs of tetrapods to show the increase in the infolding of their surfaces, (a) Proteus, (b) Siren, (c) Rana (d) Sphenodon, (e) Varanus (a lizard), (f) Thassochelys (a turtle) (g) 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 Hughes, G. M. (George Morgan). Cambridge, Mass. , Harvard

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. Comparative physiology of vertebrate respiration. Vertebrates -- Respiration; Physiology, Comparative. Fig. 12. Diagrams of the lungs of tetrapods to show the increase in the infolding of their surfaces, (a) Proteus, (b) Siren, (c) Rana (d) Sphenodon, (e) Varanus (a lizard), (f) Thassochelys (a turtle) (g) 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 Hughes, G. M. (George Morgan). Cambridge, Mass. , Harvard University Press

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