so that this character shows up extremely well. The growth-lines on the body-whorl also show the presence of a distinct sinus at earlier stages of growth; while those on the penultimate whorl show that the sinus, though present at that stage, was not as deep as that of the adult. Height, 2·25 mm.; width, 1·15 mm. Locality: Kaawa Creek beds (Waitotaran). Type (unique) in writer's collection. This interesting shell turned up unexpectedly in sievings obtained at Kaawa Creek in 1936.

Appendix. Odostomia geoffreyi Laws. 1939. Odostomia geoffreyi Laws, Trans. Roy. Soc. N.Z., vol. 69, p. 197. This species was not figured at the time of description. An illustration is now provided (Fig. 7).