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Eurypterus, a fossil eurypteridThe paddles used for swimming are very conspicuous in the Silurian eurypterid Eurypterus from New York State. This individual measures 12 cm in length
Curtis British Entomology Plate 281Hemiptera: Ranatra linearis (Linear Water-scorpion) [Plant: Gentiana pneumonanthe (Calanthian Violet)] Date: 1824-39
Pterygotus anglicus, giant water scorpion