Note 2571 — BOOK IX. THE NATURAL HISTORY OF FISHES.
John Bostock translation
Ἱπποὶ. The more common reading is ἱππεῖς, “horsemen.” Cuvier thinks, that in all probability, these are a kind of crab with very long legs, vulgarly known as the sea-spider; the Macropodia and the Leptopodia of Linnæus.