title: Ultrastructural studies of periostracum formation in the hard shelled clam Mercenaria mercenaria (L).
mesh_terms: D000818:Animals; D049872:Bivalvia / Q000166:cytology*; D002462:Cell Membrane; D002467:Cell Nucleus; D003896:Desmosomes; D004721:Endoplasmic Reticulum; D004847:Epithelial Cells; D006056:Golgi Apparatus; D002479:Inclusion Bodies; D007365:Intercellular Junctions; D008854:Microscopy, Electron; D008928:Mitochondria