A Review of the Tertiary and Recent Neozelanic Pyramidellid Molluscs. No. 7—Further Odostomid Genera. By C. R. Laws., d.sc, Auckland. [Read before the Auckland Institute, February 19, 1940; received by the Editor, February 26, 1940; issued separately, September, 1940.] Genus Agatha A. Adams. 1860. A. Adams, Ann. Mag. Nat. Hist., 6, p. 422. Type (fide Dall and Bartsch): Pyramidella (Agatha) virgo A. Adams.* See fig. 6. Adams subsequently (1861) changed Agatha to Myonia, but his reason for doing this is unknown, since Dall and Bartsch state that the earlier name is not preoccupied. Myonia, however, is preoccupied, and it was renamed Amathis in the same year, and also Adelactaeon by Cossman, 1895. Agatha covers very well indeed certain large Odostomia from New Zealand, and the figure of A. virgo, the genotype (Proc. U.S. Nat. Mus., vol. 30, p. 335, pl. 18, fig. 2; 1906), shows that species to be remarkably similar to O. alexanderi Marwick, a fossil from the Duntroonian beds at Chatton. The generic features of Agatha are: large size; high body-whorl with elongated, subovate aperture; strong suture, sometimes almost channelled; oblique, arcuate pillar with a strong plait entering aperture spirally at a high angle. The base becomes depressed alongside the pillar to form a furrow which leads towards a very narrow umbilical chink. The subangulation on the periphery of the last whorl, present in the genotype, is also quite typical of the Neozelanic species, and is no doubt also a character of generic significance. The same applies to the effuse nature of the basal lip near its junction with the columella. Key to Neozelanic Species of Agatha. Adult shell large, not less than 9.0 mm. high. Sutures margined. Spire sharpened, its outline faintly concave; whorls closely staged; body-whorl broadly convex, not angled. otaioensis Spire not sharpened by concave outline; whorls not staged; body-whorl sub-angled at periphery. georgiana Sutures not margined. Whorls distinctly though narrowly staged; pillar considerably excavated; plait strong. alexanderi Adult shell smaller, less than 9.0 mm. high. Apex blunter than usual, embryo more convex on summit; growth-plications obvious; suture distinctly closely submargined. pittensis