An operculate snail far from the sea: Hendersonia.    From Wordnik.com.  [The naughty bit of a snail] Reference

An operculate snail far from the sea: Hendersonia occulta.    From Wordnik.com.  [Archive 2006-11-01] Reference

SNAIL'S TALES: An operculate snail far from the sea: Hendersonia occulta skip to main.    From Wordnik.com.  [An operculate snail far from the sea: Hendersonia occulta] Reference

This species is notable for a hinged operculate flap attached to the main shell, a unique feature among the Gastropoda.    From Wordnik.com.  [Sao Tome and Principe moist lowland forests] Reference