Fig. 6. Camera lucida drawings of the feeding apparatus in four biting coral reef teleosts with intramandibular joints marked by open circles. Proximal (articular) and distal (dentary) components of the joints are marked by solid black bars (see text for explanation). (A,B) joints rotated, (C,D) joints relaxed. (A) Pomacanthus (f. Pomacanthidae); (B) Ctenochaetus, (f. Acanthuridae); (C) Scarus, (f. Scaridae); (D) Escenius, (f. Blennidae). Scale bars, 10 mm, except D, 0.1 mm.Labelling follows Fig. 2.