Note 287 — Chapter VII · ORGANS OF SENSE: TOUCH, SIGHT, SMELL, HEARING—THE FOOT—THE NERVOUS SYSTEM
Reading edition
V. Willem (Arch. Biol. ut infr.) denies this, and declares that Cyclostoma is only very sensitive to movements. The present writer has often approached, with the greatest care, a crawling Cyclostoma, but it always withdrew into its shell or fell to the ground when approached within about 10 or 12 inches.