Characterization of sugar components of protein

Abstract

The scope of the present work is limited to the general distribution of red fluorescence in shells. Of the spectral bands detected some at least are due to concomitant pigments of non-porphyrin character which have been separated chromatographically. Details ofthese, and ofthe chemistry ofisolated shell porphyrins, will be published in forthcoming communications. SUMMARY 1. The distribution of red fluorescence in molluscan shells is described. It is absent from land and fresh-water forms, and commonest in the Archaeogastropoda, appearing also in the Lamellariacea, certain Cypraeidae, the tectibranch opisthobranchs, Umbraculum, the pearl oysters, and sporadically elsewhere. The limits of distribution coincide closely with the existing anatomical nomenclature.