The Ancient Life-History of the Earth: a Comprehensive Outline of the ...
The Ancient Life-History of the Earth: a Comprehensive Outline of the ...
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Most of the remains of the Permian Fishes have been obtained from the " Marl-slate " of Durham and the corresponding " Kupfer-schiefer " of Germany, on the horizon Digitized by Google 2CX> HISTORICAL PALiEONTOLOGV.
of the Middle Permian; and the principal genera of the Ganoids are Palaoniscus and Platysomus (fig. 137).
The Amphibians of the Permian period belong principally to the order of the Labyrinihodonts^ which commenced to be represented in the Carboniferous, and has a large development i...n the Trias. Under the name, however, of Palxosiren Beinerti^ Professor Geinitz has described an Amphibian from the Lower Permian of Germany, which he believes to be most nearly allied to the existing "Mud-eel" {Siren lacertind) of North America, and therefore to be related to the Newts and Sala- manders (Urodeld), Finally, we meet in the Permian deposits with the first un- doubted remains of true Reptiles. These are distinguished, as a class, firom the Amphibians^ by the fact that they are air- breathers throughout the whole of their life, and therefore are at no time provided with gills; whilst they are exempt from that metamorphosis which all the Amphibia undergo in early life, consequent upon their transition from an aquatic to a more or less purely aerial mode of respiration.
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To quickly assess the difficulty of the text, read a short excerpt:
Most of the remains of the Permian Fishes have been obtained from the " Marl-slate " of Durham and the corresponding " Kupfer-schiefer " of Germany, on the horizon Digitized by Google 2CX> HISTORICAL PALiEONTOLOGV.
of the Middle Permian; and the principal genera of the Ganoids are Palaoniscus and Platysomus (fig. 137).
The Amphibians of the Permian period belong principally to the order of the Labyrinihodonts^ which commenced to be represented in the Carboniferous, and has a large development i...n the Trias. Under the name, however, of Palxosiren Beinerti^ Professor Geinitz has described an Amphibian from the Lower Permian of Germany, which he believes to be most nearly allied to the existing "Mud-eel" {Siren lacertind) of North America, and therefore to be related to the Newts and Sala- manders (Urodeld), Finally, we meet in the Permian deposits with the first un- doubted remains of true Reptiles. These are distinguished, as a class, firom the Amphibians^ by the fact that they are air- breathers throughout the whole of their life, and therefore are at no time provided with gills; whilst they are exempt from that metamorphosis which all the Amphibia undergo in early life, consequent upon their transition from an aquatic to a more or less purely aerial mode of respiration.
What to read after The Ancient Life-History of the Earth: a Comprehensive Outline of the ...?
You can find similar books in the "Read Also" column, or choose other free books by Nicholson Henry Alleyne to read onlineMoreLess
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