Elementary textbook of economic zoology and entomology . elementarytextbo00kell Year: [c1915] ventricle f pericardium rectum f / kidney ^_,--dorsal palltal aperture -- posterior aorta post, retractor post adductor anus ...... visceral ganglion exhalant si plum super brcwichial e ham her - right gill inhalant * shell palHal groove mantle mantle cavity Fresh-water mussel, I'nio sp.

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