GASTEROPODA 179 



post-nuclear sculpture consists of a few strong spiral ridges. On the spire there are 

 three primary ridges and a fourth at the periphery ; between these primary ribs there is 

 in each interspace a spiral thread, but these are weak, with the exception of a moderately 

 strong one between the third and the peripheral ridges. On the base there are four 

 broad and strong evenly developed spiral ridges with interspaces of less than half their 

 own width. There is no umbilicus, but in its place a calloused area with an arcuate 

 shallow groove, which runs parallel to the thickened pillar. Colour pale buff, inter- 

 costal spaces light brown, interior iridescent. 



Height 37 mm. ; diameter 4-5 mm. (Holotype). 



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



Family CALLIOSTOMATIDAE 

 Genus Zeminolia, Finlay, 1926 

 Type (original designation) : Minolta plicatula, Murd. and Suter 

 Zeminolia luteola, n.sp. (Plate LI, figs. 1, 2). 



Shell small, depressed, shining, almost smooth, widely and deeply umbilicate. 

 Whorls 4^, including typical smooth bulbous protoconch of one whorl, which ter- 

 minates in a minute varix. Spire low, a little less than height of aperture. The whole 

 of the body whorl and base is smooth, but there is faint spiral sculpture on the spire 

 whorls, being most prominent on the first post-nuclear whorl, thence diminishing and 

 finally disappearing at the commencement of the body whorl. The spiral sculpture con- 

 sists of six approximately equispaced fine threads on the early whorls, and a variable 

 number over the penultimate, owing to the disappearance of those near to the lower 

 suture and the addition of some intermediate threads above. There is a flat, moderately 

 wide, but ill-defined shoulder to all the post-nuclear whorls, although it is almost 

 obsolete towards the aperture. The deep and wide perspective umbilicus has straight 

 smooth sides and is bordered by a prominent smooth spiral ridge. Aperture sub- 

 circular, adnate to parietal wall for a very short space. Peristome thin, columellar por- 

 tion almost straight, vertical, weakly notched below at the termination of the circum- 

 umbilical ridge. Colour: protoconch chrome, following whorl bright lemon yellow and 

 then merging into the general ground colour of pale pinkish buff. There is a faint colour 

 pattern of widely spaced narrow chevrons of light red, one series just below the suture 

 and the other at the periphery. 



Height 4 mm.; major diameter 5-5 mm. (Holotype). 



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



In shape this species is near to the genotype, but the sculpture and coloration differ 

 considerably. 



Zeminolia vera, n.sp. (Plate LI, fig. 3). 



Shell small, depressed, finely Urate, shining, widely and deeply umbilicate. Whorls 

 4I, including typical smooth bulbous protoconch of one whorl. Spire low, a little less 



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