. The chordates. Chordata. Epilogue: What Conies of Studying Vertebrates superimposed upon them, the groups fall into line i as in the anatomic series. in the same order Paleontology arranges the vertebrates in a chronologic series depending on the distribution of vertebrate fossils in geologic strata. Fishes appear in the early Paleozoic (see Table 3, p. 411). In the mid- Paleozoic Devonian, an "Age of Fishes," are found the first evidences of amphibians. Reptiles appear in the later Paleozoic. Mammal-like reptiles toward the close of the Paleozoic are succeeded by definitely mammal
. The chordates. Chordata. Epilogue: What Conies of Studying Vertebrates superimposed upon them, the groups fall into line i as in the anatomic series. in the same order Paleontology arranges the vertebrates in a chronologic series depending on the distribution of vertebrate fossils in geologic strata. Fishes appear in the early Paleozoic (see Table 3, p. 411). In the mid- Paleozoic Devonian, an "Age of Fishes," are found the first evidences of amphibians. Reptiles appear in the later Paleozoic. Mammal-like reptiles toward the close of the Paleozoic are succeeded by definitely mammalian types in the middle Mesozoic (Jurassic). Archaeopteryx, the earliest known bird, was Jurassic. Anatomy, Embryology, and Paleontology, each using only its own data, arrange the major groups of vertebrates in the same serial. Fig. 601. Phytogeny of the vertebrates. The varying width of the black bands representing the several groups suggests the relative abundance of the members of the groups. (Courtesy, Romer: "Vertebrate Paleontology," University of Chicago Press.). 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 Rand, Herbert W. (Herbert Wilbur), 1872-1960. Philadelphia : Blakiston
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