Newcombia canaliculata
Newcombia canaliculata is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Achatinellidae. This species is endemic to Hawaii. Distribution & Habitat 
These mollusks have been found in Halawa, Molokai and Wailau, Maui. Usually found at higher, mesic elevations. They live on lehua trees, as well as lantana trees. Description 
Newcombia canaliculata has a long, thin textured spiral shell, made up of calcium carbonate that ranges in varieties of brown tones. Shells may be solid colors completely, or have multiple tinges/patterns of neutral colors like white, black and brown. What makes the Newcombia canaliculata so unique is its thin spiral ribbing coiled around the shell. Additionally some snails may have zigzag patterns on a single whorl and oftentimes appear  “blurred.”

References

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Biota of Molokai
Molluscs of Hawaii
Endemic fauna of Hawaii
Endangered fauna of Hawaii
Gastropods described in 1905
Taxonomy articles created by Polbot