Genus Mayena Iredale, 1917.
Type (orig. desig.): Biplex australasia Perry.
Mayena bartrumi n.sp. (Pl. 39, fig. 12.)
Shell of moderate size, fusiform; strongly variced at slightly more than half-whorl intervals. Spire slightly less than height of aperture plus the short canal. Nuclear whorls missing; post nuclear whorls 5. Sculpture of 3 equispaced rows of strong rounded nodules on the body whorl; on the spire, only the uppermost of these occurs and is placed medially; the second just shows at the suture towards
Figs. 1 and 2.—Eucrassatella ampla (Zittel), Squadron Bay, Waiheke. Fig. 3.—Eucrassatella attenuata (Hutton), Target Gully, Oamaru. Fig. 4.—Pteria oneroaensis (Powell and Baitrum), Neotype. Fig. 5.—Parapholas aucklandica n.sp.: Holotype. Fig. G.—Parapholas aucklandica n.sp.: Paratype. Figs. 7 and 8.—Cardium oneroaensis n.sp. Holotype. Fig. 9.—Glycymeris (Grandaxinea) aucklandica n.sp., Holotype. Fig. 10.—Venericardia (Megacardita) squadronensis n.sp., Holotype. Fig. 11 and 12.—Vene [ unclear: ] rica [ unclear: ] rdia (Megacardita) squadronensis n.sp., Pa [ unclear: ] iatypes.
Figs. 1 and 2.—Sarmaturbo superbus (Zittel), Operculum. Fig. 3.—Magnatica (Spelaenacca) waitemataensis n.sp., Holotype. Fig. 4.—Willungia tasmanica n.gen. and sp., Holotype, Table Cape, Tasmania. Fig. 5.—Willungia ovulatella (Tate). Topotype, Aldinga, S. Australia. Fig. 6.—Willungia fracta (Tomlin), T [ unclear: ] ielissick Basin, Canterbury. Fig. 7.—Willungia fracta (Tomlin), Squadron Bay, Waiheke. Fig. 8.—Willungia mao [ unclear: ] ria n.sp. Holotype. Fig. 9.—Willungia maoria n.sp., Awamoa Creek. Figs. 10 and 11.—Euspinacassis oneroanesis n.sp., Holotype. Fig. 12.—Mayena bartrumi n.sp., Holotype. Fig. 13.—Scutellastra cooperi n.sp., Paratype. Fig. 14.—Scutellastra cooper [ unclear: ] i n.sp. Holotype. Fig. 15.—Cookia kawauensis n.sp. Holotype. Fig. 16.—Austrotoma finlayi n.sp., Holotype. Fig. 17.—Austrotoma finlayi n.sp., Paratype. Fig. 18.—Haliotis flemingi n.sp., Holotype. Fig. 19.—Haliotis (Notohaliotis) waitemataensis n.sp., Holotype.
the end of the penultimate whorl. There are six of these nodules between each pair of varices. On the early whorls and on the shoulder only of the later whorls there are numerous, somewhat irregular, narrow and flexuous axial folds. The whole shell, nodules included, is crossed by well-marked dense spiral striations. The varices are heavy rounded flanges very slightly buttressed from behind adjacent to the nodular rows, and margined at the front by the thin recurved edge of the outer-lip callus. Aperture narrowly ovate, notched above and with a short narrowly open straight canal below. Inner-lip callus broad and smooth with a small parietal tubercle and several weak denticles below. Outer lip reflected, weakly denticulate along the inner edge and terminating externally as a thin-edged flange separated from the labial varix by a deep narrow groove.
Height, 67 mm.; diameter, 35 mm. (holotype).
Holotype in the writer's collection, Auckland Museum.
Locality: Squadron Bay, Waiheke Island, Auckland. Collected by A. W. B. P.
This species is allied to Cymatium kaiparaensis Finlay, 1924, and C. sculpturatum Finlay, 1924, both of which were later referred to Mayena by their author (Trans. N.Z. Inst., 57, p. 400).
The new species is characterised by having blunt tubercles combined with fine subsidiary spirals.