to apertural margin where it meets lower groove, space between the two being occupied by lobe of callus; the inner margin of aperture noticeably sinused about top of funicle. Type in collection of New Zealand Geological Survey. Height, 30 mm.; diameter, 22 mm. Localities.—165, White Rock River, Pareora (type); Target Gully, Oamaru; 1075, argillaceous sandstone, 12 chains north-north-west of Rangiriri Trig., Piopiotea West Survey District (Mohakatino base); 649, Paparoa Rapids, Wanganui River; 475, Mount Harris, South Canterbury (= P. gibbosus and P. ovatus of Suter, 1921, p. 64); 958, Rifle Butts, Oamaru, bed A, overlying Oamaru stone (= P. gibbosus of Suter, 1921, p. 86); 458, Pareora (= P. gibbosus of Suter, 1921, p. 58); Awamoa (H. J. Finlay); Wharekuri? horizon (H. J. Finlay). Uber sagenus (Suter). (Plate 58, figs. 5, 6, 8.) 1917. Polinices (Neverita) sagenus Suter, N.Z. Geol. Surv. Pal. Bull. 5, p. 10, pl. 3, fig. 3. The holotype has a widely open umbilicus which reaches up to apex of shell, but no other specimen has been seen which agrees exactly with this shell. The large species, so common in the Lower Wanganuian beds at Waipipi, Hawera, Waingongoro, &c., and identified by Suter (1921, p. 25), also by Marshall and Murdoch (1920, p. 125; 1921, p. 87), as P. sagenus, is in this paper named U. waipipiensis; for, while it resembles sagenus in umbilical development, its shape is quite different. The most important difference, however, is in the inclination of the outer lip. In U. waipipiensis it is inclined at about 26° from the vertical, while in U. sagenus the angle is 37°. The specimen figured on Plate 58, fig. 6, is a topotype of U. sagenus, and, as may be seen, has the same outline and same disposition of callus. The inclination of outer lip is also about 37° from the vertical. There can therefore be little doubt that the two shells are conspecific. One important difference exists, however: in the type specimen the umbilicus is wide and deep, extending almost to the spire; in the other it is quite shallow, and when the shell was a quarter of a whorl younger must have been completely closed. The only other specimen seen which agrees with these two in outline, aperture, and callus is from Trelissick Basin. In this specimen the umbilicus is for the most part shallow, as in the second Pareora specimen, but there is a very small chink at top penetrating upwards perhaps ⅛ in. Despite these differences the actual appearance of the apertural callus is similar in all cases, and with the great inclination of outer lip justifies specific recognition. Localities.—165, White Rock River, Pareora; 226, Porter and Thomas Rivers, Trelissick Basin. Uber chattonensis n. sp. (Plate 58; fig. 3.) Shell fairly large, ovate; spire sharp, about one-third height of aperture (including callus); whorls 5, rapidly increasing, surface with growth-lines; suture tangential; aperture semilunar; outer lip sinuous, slightly concave in middle, and retracted above to suture; inner lip with thick parietal callus nearly covering umbilicus (which, however, is penetrating), and cemented to parietal wall along its whole outer side; umbilicus with funicle coalescing with callus, line of junction not marked by distinct groove.