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Diagram of a dissection of the reproductive organs of a snail. a.g., albumen gland; c.d., common or hermaphrodite duct; c.g., hermaphrodite gland; d.s., dart sac; f, flagellum; g, genital aperture; m.g., mucous glands; o, oviduct; p, penis; r.s., receptaculum seminis; v.d., vas deferens.


Thomas Walton Galloway, Zoology A Text-Book For Secondary Schools, Normal Schools and Colleges (Philadelphia: P. Plakiston's Son & Co., 1913) 248


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