GASTEROPODA 213 



greater than height of aperture. Whorls four, including a smooth papillate protoconch 

 of ih whorls, the tip slightly oblique. Whorls evenly and lightly convex. Aperture long 

 and narrow with parallel sides, channelled above and very shallowly notched below. 

 Outer lip straight medially and slightly thickened back from the edge, which is thin. 

 Pillar straight medially, very little oblique below and bordered by the characteristic 

 weak plait at the base. Body whorl slender, lightly convex, very slightly constricted to- 

 wards the neck which bears nine rather broad, low, rounded, weak, oblique cords with 

 linear interspaces. 



Height 3-1 mm.; diameter 1-2 mm. (Holotype). 



Habitat: Off Three Kings Islands, Sts. 933, 934, 92 m. 



Allied to the previous species but differing from it in being more fusiform, less 

 tightly coiled, not so much constricted towards the neck and in having a smaller proto- 

 conch. Also the axial sculpture is weaker and there are no punctate spiral striae. 



Zemitrella turgida, n.sp. (Plate LVI, fig. 5). 



Shell small, very solid, ovate-biconic. Whorls 5 \, including a bluntly rounded smooth 

 protoconch of 1^ whorls, the nucleus slightly oblique. Spire about equal to height of 

 aperture plus canal. Whorls gently convex, sutures not much impressed. There is no 

 sculpture apart from seven flat spiral cords with linear interspaces situated on the neck 

 of the base. Aperture narrow with parallel sides, slightly angled and weakly notched 

 above, open but neither notched nor recurved below. Outer lip fairly thin at edge but 

 much thickened just within the aperture, where there is a row of about six (base of 

 outer lip slightly damaged in holotype) distinct denticles. Columella vertical medially 

 but very slightly curved to the left below. Ground colour pale buff, with three rows of 

 white chevrons, which are marked out with light brown on their front edge. Protoconch 

 and sculptured part of the neck also white. The spire whorls have only the one band of 

 chevrons, the largest. The other two chevron bands are very narrow; one occurs just 

 below the junction of the outer lip with the body whorl and the other just at the upper- 

 most of the spiral cords on the neck. 



Height 4-3 mm. ; diameter 2-4 mm. (Holotype). 



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



This species appears to be nearest to Z. stephanophora (Suter, 1908), so far as can be 

 judged from the holotype which is a badly beach-worn shell. Well-preserved specimens, 

 assumed to be stephanophora, differ from the Three Kings Islands shell in being larger and 

 more elongate, and in having a smooth slightly dilated outer lip and a papillate protoconch. 



Zemitrella curvirostris, n.sp. (Plate LVI, fig. 6). 



Shell small, ovate-elongate. Whorls five, including a papillate smooth protoconch of 

 1^ whorls, with the nucleus slightly tilted. Spire a little greater than height of aperture 

 plus canal. Whorls gently rounded, sutures lightly impressed. Surface practically 

 smooth, rendered slightly silky by extremely fine and crowded axial growth striae. 

 The only true sculpture is thirteen flattened spiral cords with linear interspaces which 



