Jervis Island Snail (Naesiotus jervisensis)

The Jervis Island Snail was described in 1917, it was apparently already extinct at that time, since only dead shells were found.:

“A few dead specimens were collected on Jervis Island [Isla Rábida] at an elevation of 900 to 1000 feet.
One or two of these were fresh enough to admit of the hope that living specimens may be secured by some future collector.” [1]

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syn. Bulimulus jervisensis Dall

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References: 

[1] William Healey Dall; Washington Henry Ochsner: Landshells of the Galapagos Islands. Proceedings of the California Academy of Sciences. Ser. 4. Vol. 17.: 141-185. 1928  

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edited: 01.06.2021