Snail
(Gastropoda)
Lunatia halli Gabb
Description: This snail is small to medium sized, about 2 to 2.5 cm (about .75 to 1 in) long and about 1.5 cm (about .5 in) wide. Most complete specimens have 3 to 4 spirals.

Commonality: Lunatia is common at Big Brook.

Similar fossils: Since the snail is preserved as molds and casts, it is easily confused with other snails that are found here. The best identification marks are the size, number of whirls, and commonality.

Size: The snail would be have been as large as the shell.

Notes: This snail was a carrion feeder, so its presence at Big Brook suggests that there was sufficient dead material to feed on.
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Internal mold of
Lunatia halli