Eatoniella bathamae is a species of marine gastropod mollusc in the family Eatoniellidae.

The species was originally identified by the name Eatoniella (Cerostraca) bathami, named after Betty Batham who assisted Ponder during his stay at the Portobello Marine Laboratory.

[2] Eatoniella bathamae has a small conical shell, smooth except for the presence of faint growth lines.

It has a variable colour, typically dark grey-purple, but including pale grey and yellowish-white.

[1] The holotype of the species was collected on 5 September 1963 at Little Papanui Beach, Dunedin, by Ponder himself, who identified the species on gelatinous red algae.