Before revision: An affected gastropod shell (a juvenile Agathistoma) from a museum collection Byne's disease, more accurately known as Bynesian decay, is a peculiar and permanently damaging condition ( resulting from an ongoing chemical reaction ) which often attacks mollusk shells and other calcareous specimens that are in storage or on display for long periods of time.
After revision: An affected gastropod shell a juvenile Agathistoma from a museum collection Byne's disease, more accurately known as Bynesian decay, is a peculiar and permanently damaging condition ( resulting from an ongoing chemical reaction ) which often attacks mollusk shells and other calcareous specimens that are in storage or on display for long periods of time.