Calcification in marine mulluscs.

Abstract

1. Various aspects of the process of calcification have been studied in several marine molluscs.2. Calcification of the shell is brought about by the formation of an organic matrix upon which minute granules of calcium phosphate are deposited.3. In the presence of, and in contact with the mantle epithelium, crystal growth occurs in sea water.4. The enzyme alkaline phosphatase appears to be concerned with calcification in these forms.5. Modification of certain constituents of sea water results in the production of a shell partially or completely lacking in mineral content.