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Fig. 1. Measurement of in vitro radula/odontophore kinematics. Two frames
are shown from a digital video recording of an isolated radula/odontophore
induced to perform feeding-like movements in response to carbachol. The line
of shadow indicating the region of widest medio-lateral extent is indicated in
the side views, and the ridge, prow and cerebral ganglion are indicated in the
top views. (A) Multiple views of the open radula and odontophore. (B) Multiple
views of the closed radula and odontophore. Scale bars, 10 mm.