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Volume 68, 1938-39
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Genus Terelimella n.gen.

Type (o.d.): Terelimella ototarana n.sp.

The name Terelimella is for a compact little assemblage consisting of two mid-Tertiary fossils and two Recent species. Of the fossil species one is Ototaran in age and the other Hutchinsonian.

The general ensemble of shell features at once sets these species apart from other Eulimellids. The chief group-characters are the very exsert, erect protoconch of a single heterostrophic turn with large, excentric lateral nucleus; the acicular habit and distinct sutures.

Key To Species Of Terelimella.*
Shell small but not minute.
Shell extremely attenuate, needle-like; whorls lightly convex; weak plait present; protocouch not sharply rounded at summ t ototarana
Shell not so attenuate nor so needle-like-whorls flat above, bulging and overhanging below; no fold on columella; protoconch sharply rounded over summit hutchinsoniana
Shell minute.
Whorls distnctly convex, evenly rounded; suture strongly cut in; apex small; columella straight larochei

Terelimella ototarana n.sp. (Fig. 13).

Shell very small, slender and exceedingly attenuate, outlines straight. Post-nuclear whorls 9, similar in shape to those of hutchin-soniana n.sp., but not quite so flat above and the anterior bulge more prominent, so that whorls overhang suture more; suture a little more impressed. Protoconch very high, exsert, sharply convex at summit and of one volution; nucleus large, excentric, a little immersed. Sculpture of extremely faint, close microscopic striae and a fine incised line sub-margining suture of upper whorls of spire. Body-whorl strongly convex; aperture ovate, widely angled behind, rounded in front; columella set vertically arcuate, a low, rounded fold above giving it sinuosity, but in some specimens it is practically straight and the fold less obvious; parieto-columellar junction well differentiated; inner lip not callused; basal lip rounded; outer lip very lightly convex.

Height, 4.0 mm.; width, 0.8 mm. (holotype).

Locality: Chatton, near Gore, Southland (Ototaran).

Type in Auckland Museum (ex writer's collection).

The much more attenuate form, more bulging and overhanging whorls, and presence of low fold on the columella distinguish this species from hutchinsoniana.

Terelimella hutchinsoniana n.sp (Fig. 5).

Shell very small, slender and considerably attenuate, outlines straight. Post-nuclear whorls 6 in number, flat above, descending obliquely exactly from suture, rapidly convex (or sub-angled) below overhanging suture; suture but little impressed. Protoconch hetero-

[Footnote] * Eulimella aupouria. Powell, described since preparation of the manuscript of the present paper, is not included in the key.

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strophic, high, exsert, sharply convex (not evenly rounded) at summit and of one volution; nucleus large, excentric, a little immersed. Sculpture absent, except for a faint microscopic incised line as a sub-margin to suture. Body-whorl flattish above, convex over periphery, lightly convex on base, which rapidly retreats to axis of shell; aperture ovate, angled behind, rather narrowly rounded in front; columella straight, vertical, its base a little expanded, no plait; parieto-columellar junction sub-angled and well differentiated; basal lip narrowly rounded; inner lip not callused; outer lip straight.

Height, 2.5 mm.; width, 0.75 mm. (holotype).

Locality: Clifden, Southland, band 6A (Hutchinsonian).

Type in Auckland Museum (ex writer's collection).

Terelimella larochei (Powell). (Fig. 14).

930. Eulimella larochei Powell, Trans. N.Z. Inst., vol. 61, p. 544, pl. 87, fig. 22.

This is a much smaller shell than either of its fossil relatives, and has the whorls more strongly and evenly convex and not bulging low down, slightly sinuous growth-striae, and less attenuate spire.

Height, 2.17 mm.; width, 0.54 mm. (holotype).

Localities: Mongonui Head, in 6—10 fathoms (type); Tryphena Bay, Great Barrier Island, in 5—6 fathoms; Awanui, in 12 fathoms; Castlecliff (Pliocene).

Type in collection of Mr. A. W. B. Powell, Auckland.

The figure is a reproduction of Powell's illustration.

Terelimella aupouria (Powell).

1937. Eulimella aupouria Powell, Discovery Reports, vol. 15, p. 210, pl. 54, fig. 9.

This minute species was taken in 92 m. off Three Kings Islands.

Height, 2.25 mm.; width, 0.58 mm. (holotype).

Type in British Museum of Natural History, London.