The sole is divided by a shallow groove (1) into a semicircular anterior third and a longer posterior section (Morton, 1955).
Jeffreys (1869) opined that the division of the sole into two lobes indicated that locomotion must resemble the looping action of some caterpillars, but this was contradicted by Morton (1955) who wrote “The two lobes of the foot are structurally very similar, and both are kept on the ground continuously when the animal is crawling. There is no well-marked stepping action as with the divided foot of Otina.” Observations and photographs made for this account support Morton’s assertion.
Under stone embedded in soil-like substrate with Myosotella form denticulata at EHWS. Menai Strait, Wales. April 2018.

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