Functional morphology of the stomach of Corophium volutator Pallas

Corophium volutator Pallas is a small amphipod crustacean which burrows in inter-tidal mud on the British coast, and feeds on organic detritus, mainly vegetable, by selecting particles from the mud.
The alimentary canal consists of foregut, midgut and hindgut. The midgut is produced into a pair of anterior dorsal caeca, a pair of ventral caeca and a pair of posterior dorsal caeca.
The cardiac stomach has a large number of chitinous plates or ridges beset with hooks and spines for the trituration of food.
The pyloric stomach has long fine bristles which form an eifective filter apparatus and allow only fine particles of food to pass into the midgut, where they are digested and absorbed.
The hepato-pancreas secrete digestive enzymes and store reserve food material as oil globules.