Saint Helena Awl Snail (Chilonopsis helena)  

The Saint Helena Awl Snail was described in the year 1833 based on subfossil shells.  

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Thomas Vernon Wollaston writes in the year 1878 (Testacea Atlantica).:  

“The present Bulimus, which was admirably figured by Quoy in 1833, occurs rather abundantly on the extreme summit of the Barn, and in that immediate neighbourhood, lying loosely on the surface soil, beneath the shrubs of Salsola, &c., – where it has much the appearance of having lived at a comparatively recent period. At all events many of the examples have their colour and outher cuticle completely preserved, – though it is equally true that the majority of them are decomposed, decorticated, and colourless.” [1]  

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References:  

[1] T. Vernon Wollaston: Testacea Atlantica: or the Land and Freshwater Shells of the Azores, Madeiras, Salvages, Canaries, Cape Verdes, and Saint Helena. London: L. Reeve & Co. 1878  

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edited: 21.03.2018