Note 2453 — BOOK IX. THE NATURAL HISTORY OF FISHES.
John Bostock translation
By this Pliny means, Cuvier says, only the symmetrical fins, or pairs of fins, the pectoral namely, which are in place of arms, and the ventral, which are instead of feet; of which, in fact, no fish has more than two pairs. Pliny does not include in this statement the dorsal, anal, and pectoral fins.