Zemitrella finlayi is a species of sea snail, a marine gastropod mollusc in the family Columbellidae, the dove snails. Endemic to New Zealand, the species was originally thought to only occur in the Chatham Islands, but has since been found to occur widely across New Zealand.
In the original description, Powell described the species as follows:
The shell of holotype of the species measures in height and in diameter. It differs from Z. choava by having a less inflated body-whorl, fewer anterior end spirals, and by being more narrowly ovate and smaller. Similar in size to Z. fallax, the species can be identified due to its more narrowly ovate outlines on the shell of Z. finlayi.
The species was first described by A. W. B. Powell in 1933. The holotype was collected by Powell himself in February 1933, from shell sand at Waitangi in the Chatham Islands. The holotype is held by the Auckland War Memorial Museum.
Z. finlayi is endemic to New Zealand, found across the waters of the New Zealand mainland, Stewart Island, the Snares Islands, and the Chatham Islands, at a depth of between . Originally thought to be endemic to the Chatham Islands, the species has since been identified across New Zealand, including the far north, far south, islands off the east coast including the Poor Knights Islands, Great Barrier Island, Whakaari / White Island, and the Tasman Sea coast of both the North and South islands.