An electron microscope study of the formation of the nacreous layer in the shell of certain bivalve molluscs

  title={An electron microscope study of the formation of the nacreous layer in the shell of certain bivalve molluscs},
  author={Dr. Gerrit Bevelander and H. Nakahara},
  journal={Calcified Tissue Research},
An electron-microscopic study was made of nacreous shell growth in several species of marine molluscs. Studies of sections of mantle-shell preparations show that the first step in crystal formation is the “polymerization” of part of the pallial fluid to form lamellae parallel to the surface of the epithelium. These lamellae form compartments enclosing a modified apallial fluid. Initiation of crystals occurs in these compartments in contact with a crystal in an adjacent layer. During crystal… CONTINUE READING
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