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and behind the columellar muscle and foot. From the mouth cavity the gullet leads backward to the enlarged stomach, which is divided into two compartments, and receives the digestive juices from the large digestive gland at the hind end of the body. Two pairs of salivary glands pour their secretions into the buccal cavity. The intestine runs

 The gills, kidneys, heart and dorsal parts of mantle and columellar muscle have been removed and spiral cœcum turned over to the right.