Vietnam or Thailand ? Vote for the TOP Country of the Week !
Updated: May 28, 2025
As the address of 1862 was passing through the press, I was able to mention, in a note, the discovery of a large Labyrinthodont, with well-ossified vertebrae, in the Edinburgh coal-field.
Objections to sudden changes. Labyrinthodont. Potto. Cetacea. As to origin of bird's wing. Tendrils of climbing plants. Animals once supposed to be connecting links. Early specialization of structure. Macrauchenia. Glyptodon. Sabre-toothed tiger. Conclusion.
They were of the Labyrinthodont family, and their association with the fish of the coal, of which so large a proportion are ganoids, reminds us that the living perennibranchiate amphibia of America frequent the same rivers as the ganoid Lepidostei or bony pikes. Slab of sandstone from the coal-measures of Pennsylvania, with footprints of air-breathing reptile and casts of cracks.
Now, however, it is considered probable that the soft back-boned Labyrinthodont Archegosaurus, was an immature or larval form, while Labyrinthodonts with completely developed vertebræ have been found to exist amongst the very earliest forms yet discovered.
So that, at the present time, the Labyrinthodont Fauna of the Carboniferous rocks is more extensive and diversified than that of the Trias, while its chief types, so far as osteology enables us to judge, are quite as highly organised.
As the Address of 1862 was passing through the press, I was able to mention, in a note, the discovery of a large Labyrinthodont, with well-ossified vertebrae, in the Edinburgh coal-field.
I take it to be certain that Labyrinthodont Amphibia existed in the distributional province which included the dry land depressed during the Carboniferous epoch; and I conceive that, in some other distributional provinces of that day, which remained in the condition of stationary or of increasing dry land, the various types of the terrestrial Sauropsida and of the Mammalia were gradually developing.
Uniting of many Coal-seams into one thick Bed. Purity of the Coal explained. Conversion of Coal into Anthracite. Origin of Clay-ironstone. Marine and brackish-water Strata in Coal. Fossil Insects. Batrachian Reptiles. Labyrinthodont Foot-prints in Coal-measures. Nova Scotia Coal-measures with successive Growths of erect fossil Trees. Similarity of American and European Coal.
I take it to be certain that Labyrinthodont Amphibia existed in the distributional province which included the dry land depressed during the Carboniferous epoch; and I conceive that, in some other distributional provinces of that day, which remained in the condition of stationary or of increasing dry land, the various types of the terrestrial Sauropsida and of the Mammalia were gradually developing.
So that, at the present time, the Labyrinthodont Fauna of the Carboniferous rocks is more extensive and diversified than that of the Trias, while its chief types, so far as osteology enables us to judge, are quite as highly organized.
Word Of The Day
Others Looking