These specimens are from Mexico. Cochlcopa lubrica , Michigan. The Cochlicopidae is a Holarctic family of land snails, closely related to the Amastridae of Hawaii. Like Achatinella, they belong to the primitive suborder Orthurethra. Partula filosa , Tahiti.
Many species are tree snails and are known for their colorful shells.
Unfortunately, many partulid species are becoming extinct because of ill-founded and unsuccessful attempts to control introduced pest snails. Samoana conica , American Samoa. All land snail have calcium carbonate crystals in their egg shells. The crystals are not evident in the more gelatinous eggs, but the eggs of some species are encased in a thick calcium covering, appearing like minature hen's eggs. Samoana diaphana , Moorea.