Mytilus / Pecten

Generalised internal structures of two bivalve genera Mytilus (mussels) and Pecten (scallops) with left valve removed.  Structures are not labelled but easy to describe from the illustrations are the gut (yellow tubes with bulbous swellings), adductor muscle (large round pink structure with brown dots), gill (green on Mytilus grey on Pecten with lines running perpedicular to the length of the structure).