Ventral face of valve v. Length of chiton 32 mm when live. LWS. Isle of Lewis, Scotland. April 2018. Leg. D.M. McKay & S.Taylor.
Two insertion plates (1) of the ventral articulatum on the ends of intermediate valves ii to viii are separated by a single slit (2). A diagonal slit ray runs from each slit to the posterior edge of each valve.
Aesthete canals penetrate the articulamentum locally in the jugal tract (3) and slit rays as conduits for branches of the body’s lateral nerve cord conveying stimuli received by the aesthetes on the surface of the tegmentum.

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