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Pterichthys Milleri (sea scorpion), an armored fish of the Devonian period.

Pterichthys Milleri

Pterichthys Milleri (sea scorpion), an armored fish of the Devonian period.

The dorsal view of Eurypterus remipes, an extinct sea scorpion from the Silurian period.

Dorsal View of Sea Scorpion

The dorsal view of Eurypterus remipes, an extinct sea scorpion from the Silurian period.