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Southwest Florida Shells with Emphasis on Sanibel & Captiva
José H. Leal
Family Calyptraeidae
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Bostrycapulus aculeatus
(Gmelin, 1791)
Spiny Slipper Snail
![](http://res.cloudinary.com/bailey-matthews-shell-museum/image/upload/v1429116831/tswwdz5ecqrgzd1qzxpv.jpg)
Shell size to 26 mm, sculptured with rough, small spines arranged along ribs that radiate from apex. Apex turned to one side. Interior with white platelike septum. Color white, light-gray, brownish, or rarely greenish, sometimes with rays of lighter color.
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