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Fig. 4. Computer tomogram of the digestive tract of Nautilus pompilius. (A-C) Three-dimensional reproductions from the right side (A), from the left side (B) and in ventral view (C). (D,E) The digestive tract within the animal, from the left side (D) and the front (E). CR, crop; J, jaw; M, midgut; R, rectum; RA, renal appendages; S, stomach; SI, siphuncle.