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Family Olividae
Baryspira macbeathi n.sp. (Pl. 26, fig. 11.)
Allied to B. robusta Marw., differing in details of callus and aperture. Spire about half height of aperture, conical with nucleus visible through the tip. Body whorl marked off from spire by a rounded but distinct angle below which the sides are gently convex. Apertural callus thick, extending about half way round shell, with its lower edge nearly horizontal, a short distance above spiral depressed band, and top just below the apex Columella gently concave, not recurved at the
![Thumbnail: [Volume 81, 1953 page 546]](/journals/rsnz/images/rsnz_81/thumbnails/rsnz_81_04_0671_0546_ac_02.gif)
top; fasciole bearing a single strong groove near the top; aperture oval, produced above as a broad shallow groove in the callus.
Height, 35 mm.; diameter, 17 mm.
Localities: N162/503, Hurupi Formation, lower Wainuioru Valley, basal Tongaporutuan (holotype); N166/538, Hurupi Formation, Pahaoa River east of Ngakonui Homestead, basal Tongaporutuan (one complete paratype). Many broken specimens, lacking the body whorl, were collected from several localities in the Hurupi Formation.
The species is named in honour of Mr. D. M. MacBeath, who collected the holotype. The writer is grateful to Mr. O. P. Olson for discussion about this species.
B. macbeathi bears a close superficial resemblance to the following species, but differs in details of the columella and fasciole.
Baryspira n.sp. aff. mucronata (Sowerby).
This species has a heavier callus than mucronata, and the outline is similar to that of B. macbeathi. It is abundant together with mucronata at many lower and middle Nukumaruan localities in south-east Wairarapa, and the two forms seem to intergrade at some places. Mr. Olson has already recognised the form from the Nukumaruan of Hawke's Bay and will describe it elsewhere.