The Partula snail is native to the South Pacific, where once upon a time it spent its days in languid island comfort, gliding slowly along the leaves and stalks of trees in high-altitude forests on the slopes of volcanoes. In a "cane toad" style chain of events, many species of Partula snail are now extinct in the wild.
Partula snails may not be particularly interesting to the layperson. They are about half an inch long, and come in various shades of brown. The Partula is the only snail that gives birth to live, fully-shelled babies.