Fig. 1. Gross anatomy of the rectal part of the intestine in elephant fish (A–C) and Southern chimaera (D,E). (A) A longitudinal slice of the post-valvular intestine. The arrow indicates the anterior end of glandular tissue at the termination of valvular intestine. (B,D) Whole-mount view of the glandular tissue of elephant fish (B) and Southern chimaera (D). Luminal epithelia and inner muscle layers were removed to expose the glandular tissue. Arrows in D indicate openings of the glandular tissues. (C,E) Magnified view of the glandular tissue in B and D, respectively. Scale bars, 0.5 mm (A); 1 mm (B,D); 200 µm (C,E).