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Anatomy of the internal organs of a female gastropod, viewed from the dorsal side. The roof of the mantle cavity has been divided by a longitudinal incision and the flaps laid out, that on the left hand bearing the etenidium and osphradium, and that on the right the rectum and terminal part of the oviduct. The muscular dorsal wall of the body and the introvert have been divided so as tobring into view the anterior part of the alimentary canal and a portion of the nervous system. The buccal cavity has been tilted up and opened so as to show the odontophore, and the esohagus has been cut through near the anterior end...

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