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Living Material

The sexes are separate. During the breeding season the gonads can be seen through the skin on the underside of the disc. The ovaries are yellowish-red and the testes white.

Fewkes (1886) stated that animals at Eastport, Maine, breed in summer until mid-August. At Nahant, in 1898, ripe animals were obtained from mid-May to the end of June (Bumpus, 1898).

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© Donald P. Costello and Catherine Henley

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