. Biology of the vertebrates : a comparative study of man and his animal allies. Vertebrates; Vertebrates -- Anatomy; Anatomy, Comparative. Kinds of Vertebrates 41 under stones, rotten logs, and in damp situations generally. Most of them undergo a metamorphosis during which the gills are lost but the tail retained. Some, however, retain their gills and spend their entire lives in the water. Necturus (Fig. 31), the mud puppy of the Mississippi River drainage sys- tem, is one of these perennibranchs, so named because of their persistent. Please note that these images are extracted from scanned p
. Biology of the vertebrates : a comparative study of man and his animal allies. Vertebrates; Vertebrates -- Anatomy; Anatomy, Comparative. Kinds of Vertebrates 41 under stones, rotten logs, and in damp situations generally. Most of them undergo a metamorphosis during which the gills are lost but the tail retained. Some, however, retain their gills and spend their entire lives in the water. Necturus (Fig. 31), the mud puppy of the Mississippi River drainage sys- tem, is one of these perennibranchs, so named because of their persistent. 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 Walter, Herbert Eugene, b. 1867; Sayles, Leonard Perkins, 1902-. New York : Macmillan Co.
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Keywords: ., bookcentury1900, booksubjectanatomycomparative, booksubjectverte
