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A labyrinthodon, an extinct amphibian of the Triassic period.

Labyrinthodon

A labyrinthodon, an extinct amphibian of the Triassic period.

Amphibian Reptiles occur through the age. They are called Labyrinthodonts, because the teeth, like those of the Ganoids, are labyrinthine in the arrangement of the dentine. The earliest traces are tracks found in the Subcarboniferous beds at Pottsville, Pa.; they are about four inches broad.

Sauropus Primaevus

Amphibian Reptiles occur through the age. They are called Labyrinthodonts, because the teeth, like those…