. Cold-blooded vertebrates: part I. Fishes. Fishes; Amphibians; Reptiles. Upper: Pseudo-fossil snake. A peculiar result of wave f)r ripple work on soft mud or some form of vegetation. The finder thought it a fossil snake Lower: Clay concretion. Supposed hy the finder to be the petrified head of a reptile. 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 Hildebrand, Samuel F. (Samuel Frederick), 1883-1949; Gilmore, Charles Wh

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. Cold-blooded vertebrates: part I. Fishes. Fishes; Amphibians; Reptiles. Upper: Pseudo-fossil snake. A peculiar result of wave f)r ripple work on soft mud or some form of vegetation. The finder thought it a fossil snake Lower: Clay concretion. Supposed hy the finder to be the petrified head of a reptile. 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 Hildebrand, Samuel F. (Samuel Frederick), 1883-1949; Gilmore, Charles Whitney, 1874-; Cochran, Doris M. (Doris Mable), 1898-1968. [New York, Smithsonian institution series, inc. ]

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Keywords: ., bookcentury1900, booksubj, booksubjectfishes, booksubjectreptiles