Genus Neojanicus Suter.
Type: Neojanicus perplexus Suter.
Neojanicus wharekuriensis n.sp. (Fig. 8).
Shell very small, flat, oval; apex terminal, large, inflated, smooth, distinctly marked off, and of about one oblique turn. Sculpture of irregular concentric growth-lines and one or two larger, more distant undulations. Margins smooth. Inner surface shining, polished. Muscle-scar not distinct, but can just be made out under microscope, quite similar to that of the genotype. Basal plate absent.
Length, 3.2 mm.; width, 2.8 mm.
Locality, Wharekuri greensands, Waitaki River.
Type in writer's collection.
This is the only undoubted species other than the genotype N. kaawaensis is very doubtfully a Neojanicus, and was only provisionally included here by Bartrum and Powell (Trans. N.Z. Inst., vol. 59, p. 143; 1928).