Elements of conchology Prepared Elements of conchology / Prepared for the use of schools and colleges elementsofconcho00rusc Year: 1844 ANATOMY OF A MACTRA. ma na b Ficr, 88. ANATOMY OF A MACTRA. Explanation of Fig. 88,—Anatomy of a inactra; one valve of the shelJ, the corresponding half of the mantle and tlie branchiae have been removed on the left side :—c. the shell;—7n. the mantle ;—?na. the anterior muscle ; —mp. the posterior muscle ;—b. the mouth ;—t. the tentacle ;—e. the sto- mach;—as. appendix of the stomach;—i. the intestines;—-/. the liver;—p. the foot;—co. the heart traversed
Elements of conchology Prepared Elements of conchology / Prepared for the use of schools and colleges elementsofconcho00rusc Year: 1844 ANATOMY OF A MACTRA. ma na b Ficr, 88. ANATOMY OF A MACTRA. Explanation of Fig. 88,—Anatomy of a inactra; one valve of the shelJ, the corresponding half of the mantle and tlie branchiae have been removed on the left side :—c. the shell;—7n. the mantle ;—?na. the anterior muscle ; —mp. the posterior muscle ;—b. the mouth ;—t. the tentacle ;—e. the sto- mach;—as. appendix of the stomach;—i. the intestines;—-/. the liver;—p. the foot;—co. the heart traversed by the rectum (r);—ts. the superior tube into which the anus (a) opens ;—ti. the inferior or respiratory tube ;—br. the branchiae of the right side ;—ga. the anterior ganglia;—na. nerves arising from them;—ng. inter-ganglionic nerves;—gp. posterior ganglia;—np. nerves arising from them and distributed to the mantle.
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