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spirale: umbilicus very narrow, aperture rather small, spire relatively high.
elegans: umbilicus large; sculpture fine, coarser on lower half.
miocaenicum: umbilicus rather small, partly covered by reflexed inner lip.
drewi: very large, no umbilicus; spire moderate, columella almost straight.
undulatum: moderate size, no umbilicus; spire low, columella concave, aperture somewhat dilated.
venustum: very large, no umbilicus; spire rather high, columella concave.
Globisinum elegans (Suter). (Plate 60, fig. 18.)
1917. Sinum (Eunaticina) elegans Suter, N.Z. Geol. Surv. Pal. Bull. 5, p. 11, pl. 3, fig. 4.
Suter gives as locality of the type, “630, Teaneraki (= Enfield), near Oamaru, North Otago, T. Esdaile.” This collection is an unreliable one, containing Hawke's Bay and Mount Harris specimens, and is wrongly attributed to Mr. Esdaile. Most of the specimens, including the type of G. elegans, are probably from McCullough's Bridge, Waihao River, where the species is not uncommon. The aperture of the type is broken away
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for a considerable distance, and the line of the suture can be followed to the middle of the whorl on Suter's figure, which therefore gives an impression of too great height in comparison with the width. The spirals are generally, but not always, much stronger on the lower part of the whorl than on the upper.
Globisinum spirale (Marshall). (Plate 60, fig. 17.)
1917. Ampullina spiralis Marshall, Trans. N.Z. Inst., vol. 49, p. 452, pl. 34, fig. 17.
Localities.—Wangaloa (type); Boulder Hill.
This is the “Eudolium?” of Suter (1921, p. 96).
Globisinum miocaenicum (Suter). (Plate 60. fig. 13.)
1873. Sigaretus subglobosus Sowerby: Hutton, Cat. Tert. Moll., p. 9 (not of Sowb.).
1914. Ampullina miocaenica Suter, N.Z. Geol. Surv. Pal. Bull. 2, p. 21, pl. 2, fig. 2.
1918. Sinum miocaenicum (Suter), Alph. List N.Z. Tert. Moll., p. 25.
Localities.—Awamoa (type); Pukeuri, near Oamaru; 166, 458, Pareora; 475, Mount Harris, South Canterbury; 950, Parson's Creek, Oamaru (= Sinum cinctum of Suter, 1921, p. 80); 125, Fox River, Brighton (= Sinum cinctum of Suter, 1921, p. 40); Trig. 2, Otekaike, Otiake beds above limestone.
Of the specimens identified as G. miocaenicum from “tuffs interbedded with chalk marls, Coleridge Creek, Trelissick Basin” (Suter, 1921, p. 51), only one is in a good condition. It is certainly very like G. miocaenicum, but differs slightly in several ways. The body-whorl is even more globose than that of G. miocaenicum, so that the distance from the umbilicus to the base of the shell is very short, thus causing the spirals to abut on the lower part of the inner lip at a high angle. The umbilicus is slightly wider than in the Awamoan species. More specimens, however, are required to show whether these differences are constant and worth specific recognition. It is possible that the relationship is closer to G. spirale, which has a higher spire and shorter anterior development than G. miocaenicum.
Globisinum undulatum (Hutton). (Plate 60, fig. 14.)
1885. Sigaretus undulatus Hutton, Trans. N.Z. Inst., vol. 17, p. 318, pl. 18, fig. 11.
1885. Natica (Ampullina) laevis Hutton, Trans. N.Z. Inst., vol. 17, p. 317, pl. 18, fig. 10.
1893. Sigaretus undulatus Hutton, Macleay Mem. Vol., p. 55, pl. 7, fig. 41.
1893. Natica laevis Hutton, Macleay Mem. Vol., p. 54, pl. 7, fig. 39.
1913. Ampullina undulata (Hutton): Suter, Man. N.Z. Moll., p. 291, pl. 15, fig. 17.
1915. Ampullina undulata (Hutton): Suter, N.Z. Geol. Surv. Pal. Bull. 3, p. 11.
1915. Polinices laevis (Hutton): Suter, N.Z. Geol. Surv. Pal. Bull. 3, p. 10.
1917. Sinum undulatum (Hutton): Suter, N.Z. Geol. Surv. Pal. Bull. 5, p. 88.
The type of this species is a Wanganui fossil (precise horizon unknown), and the only record of its Recent occurrence is by Webster (1905, p. 280), who collected a specimen at Cape Maria van Diemen. It is possible that his shell was a G. venustum Hutton's two syntypes of Natica laevis are identical in every respect with G. undulatum except that the spiral ornamentation is lacking. A careful scrutiny of the surface shows that it is much pitted, and that there are traces of the spirals in protected areas. It is therefore practically certain that the sculpture has been worn off by attrition in the shell-bed from which the specimens came.
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Type from Wanganui, but horizon uncertain.
Localities.—Recent (only one record); Castlecliff, Wanganui (type?); Nukumaru (fide Marshall and Murdoch); Petane; 1063, shell-bed below Petane limestone, Okawa Creek, Ngaruroro River.
Globisinum drewi (Murdoch). (Plate 60, figs. 11, 15.)
1899. Sigaretus (?) drewi Murdoch, Proc. Malac. Soc., vol. 3, p. 320, pl. 16, fig. 1.
1915. Ampullina drewi (Murdoch): Suter, Alph. Hand-list N.Z. Tert. Moll., p. 3.
1917. Sinum (Eunaticina) drewi (Murdoch): Suter, N.Z. Geol. Surv. Pal. Bull. 5, p. 88.
A careful examination of the anterior part of the body-whorl of the type shows faint indications of low spiral ridges such as exist on the type of G. venustum, but smaller specimens from Kai Iwi show no sign of them.
Holotype in Wanganui Museum.
Height, 38 mm.; diameter, 37 mm.
Locality.—Coast north-west of Wanganui, probably in the vicinity of Kai Iwi.
Globisinum venustum (Suter). (Plate 60, fig. 10.)
1907. Euspira venusta Suter, Proc. Mal. Soc., vol. 7, No. 4, pl. 18, fig. 13.
1913. Ampullina venusta (Suter), Manual N.Z. Moll., p. 292, pl. 15, fig. 18.
Suter's figure is misleading, for it gives far too great prominence to the spiral ribs on the lower part of the shell. These are so inconspicuous that they make practically no difference to the profile, and even when the light is in a favourable position thay can hardly be seen. A topotype in the possession of Miss M. K. Mestayer does not show the ribs at all, and has much the appearance of G. drewi. These are the only two specimens of the species which have been found; and, since complete adult specimens of both G. undulatum and G. drewi are rare, the material available is not sufficient to give a proper idea of the relative values of the three species named. They may not all be worth recognition.
Holotype in the Suter collection, Wanganui Museum.
Height, 40 mm.; diameter, 37 mm.
Locality.—Near Cape Farewell. (Recent.)