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This genus agrees with SCIAPHOS, PYXICEPHALUS, and PELOLATES, in having a large, sharp-edged tubercle on the inner edge of the ankle, but it differs from them at first sight, by the head and body being compressed and high, the mouth very large, and the eyes convex on the side of the forehead. PERIALIA EYREI, t. 2. f. 3.
This genus agrees with SCIAPHOS, PYXICEPHALUS, and PELOLATES, in having a large, sharp-edged tubercle on the inner edge of the ankle, but it differs from them at first sight, by the head and body being compressed and high, the mouth very large, and the eyes convex on the side of the forehead. PERIALIA EYREI, t. 2. f. 3.
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