Anatomy
The body is flecked with small white spots on the back of the head and tentacles, but not on the foot. The mantle is pigmented with a line of dark spots along its edge, irregular spots which show through the shell. The foot is roundly elongated, 18 × 11 mm.
The head is broad, auriculated. This species also has tentacles that are large, flat, lobate, triangular, fan-shaped and wider than they are high.
The blood contains blue hemocyanin. The heart pulsations are slow and regular: thirty-four per minute. The animal is slow and deliberate in its movements.
For a detailed description of Radix auricularia, including the radula and reproductive organs, see pages 179-183 in Baker F. C. The Lymnaeidae of North and Middle America, recent and fossil (1911). The Chicago Academy of Sciences.
Read more about this topic: Radix Auricularia
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