The same family, as well as a very great variety of ganoids and Teleostei, appear in such quantities that they give occupation to nearly Ioo,000 people.
Most of the sharks lived in the sea continuously, but the ganoids frequenting the coastal waters appear to have migrated inland.
Fishes were abundant, many of the smaller ganoids are beautifully preserved in an entire condition, other larger forms are represented by fin spines, teeth and bones; Ctenodus, Uronemus, Acanthodes, Cheirodus, Gyracanthus are characteristic genera.
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