2o 4 DISCOVERY REPORTS 



Dardanula minutula, n.sp. (Plate LIII, fig. 14). 



Shell minute, bluntly elongate-conical, pupoid, thin but not fragile, smooth and 

 polished. Whorls 4^, plus a broad low dome-shaped protoconch of about ih whorls. 

 Spire tall, bluntly conical, if times height of aperture. Outline of whorls very slightly 

 convex, body whorl rounded at periphery, base convex, smooth, imperforate. Aperture 

 small, roundly ovate. Peristome thin, continuous as a callus across the parietal wall. 

 Lower portion of inner lip sharp edged, free, slightly overhanging the base. The suture is 

 inclined steeply downwards to the aperture just before the termination of the last whorl. 



Height 0-95 mm.; diameter 0-55 mm. (Holotype). 



Habitat: Off Three Kings Islands, St. 933, 260 m. 



This species is characterized by its extremely small size, small aperture and blunt 

 apex. In shape it resembles some of the species that have been ascribed to Notosetia, but 

 the form of the aperture is typical of Dardanula. 



Family CERITHIIDAE 



Genus Zebittium, Finlay, 1926 



Type (original designation) : Cerithium exilis, Hutton 



Zebittium laevicordatum, n.sp. (Plate LIV, fig. 3). 



Shell small, elongate, narrow, gently tapered; sculptured with delicate smooth low 

 spiral cords, having linear interspaces. Whorls 7A, including a smooth dome-shaped 

 protoconch of ii whorls; tip slightly tilted and immersed. First and second post- 

 nuclear whorls showing very indistinct spiral striations. Third post-nuclear whorl with 

 eight low flattened smooth cords separated by linear interspaces; succeeding spire 

 whorls with nine, body whorl with six more on base. There is no axial sculpture and 

 there are only the finest growth striae. Spire tall, a little less than three times height of 

 aperture. Outlines almost straight, suture very slightly adpressed. Aperture ovate- 

 pyriform, narrow above, broadly rounded below, and with a broad shallow basal notch. 

 Outer lip thin. Inner lip as a moderately heavy narrow arcuate callus extending from 

 the suture right to the base of the pillar. Colour pale creamy buff with a few small 

 widely spaced buff-coloured spots. These occur only on the first subsutural cord and 

 on the basal ones. 



Height 4-05 mm.; diameter 1-5 mm. (Holotype). 



Habitat: Off Three Kings Islands, St. 933, 260 m. 



This species differs from its allies, exile (Hutton, 1873) (Cat. Marine Mollusca, p. 27) 

 and editum, Powell, 1930 (Trans. N.Z. Inst., lx, p. 541), in the complete absence of axial 

 sculpture. 



