Eatoniella bathamae is a species of marine gastropod mollusc in the family Eatoniellidae. First described by Winston Ponder in 1965, it is endemic to New Zealand, found in the waters of the southern South Island, Stewart Island, the Snares Islands / Tini Heke and the Auckland Islands.
In the original description, Ponder described the species as follows:
E. bathamae measures by , and can range from ovate to conic.
The species was first described by Winston Ponder in 1965, who used the name Eatoniella (Cerostraca) bathami. The species is named after Betty Batham, who assisted Ponder during his stay at the Portobello Marine Laboratory. The modern formatting of the name without a subgenus, Eatoniella bathami, was established by Hamish Spencer and Richard C. Willan in 1995. The species epithet spelling was altered to bathamae due to the name using an incorrect gender ending. The holotype of the species was collected by Ponder himself on 5 September 1963, on gelatinous red algae at Papanui Beach, Dunedin. It is held by the Auckland War Memorial Museum.
The species is endemic to New Zealand, found in the waters of the southern South Island, Stewart Island, the Snares Islands / Tini Heke, and the Auckland Islands, in depths ranging between below sea level. E. bathamae is known to live on algae.