The heading in the original description is the following: "Diplommatina nicobarica var. battemalvensis n. sp.". Below that, Godwin-Austen mentioned that this species was labelled as Diplommatina nicobarica var. battemalvensis. However, the indication of "n. sp." shows that battemalvensis was in face introduced on the species level.
Godwin-Austen, H. H. (1895). List and distribution of the Land-Mollusca of the Andaman and Nicobar Islands, with descriptions of some supposed new species. <em>Proceedings of the Zoological Society of London.</em> 1895: 438–457.available online athttps://www.biodiversitylibrary.org/page/30983429