BY C. HEDLEY. 495 



A few specimens from 17-20 fathoms. 



Named in honour of Mr. A. Liddell, a member of our party. 

 The novelty is related to R. invisibilis Hedley {Mem. Austr. Mus, 

 iii. 1899, p 4:18, fig. 9) from Funafuti. The sculpture recalls 

 Cyclostrema, but the few whorls and solid varix do not well agree 

 with that genus, 



Onoba glomerosa, n.sp. 



(Plate xvii., fig.23.) 



Shell small, solid, glossy, columnar, blunt at either end. Colour 

 milk-white to pale ochre, yellow at the summit. Whorls five, 

 first three turbinate, last two-thirds of the shell's total length 

 slightly inflated, contracted at the sutures, wound obliquely. 

 Sculpture: top whorls smooth, last two ornamented by fine flat- 

 topped spiral riblets parted by shallow grooves of slightly greater 

 breadth; the riblets are more crowded on the centre of the whorl. 

 There are 20 on the last and 10 on the antepenultimate whorl. 

 Faint growth-striae cross riblets and grooves obliquely. Aperture 

 round, bevelled at the edge, and thickened within but not 

 externally. Height 2*9 mm.; breadth 1-35 mm. 



Common around Mast Head. I have also seen it in shell-sand 

 from Noosa, Queensland. It is closely related to 0. mercurialis 

 Watson,* but the novelty is shorter, proportionately broader, 

 with less defined sutures. 



Amphithalamus capricorneus, n.sp. 



(Plate xvii., fig.22.) 



Shell minute, solid, perforate, ovate, smooth. Whorls four, 

 contracted at the suture, inflated, rapidly increasing, last descend- 

 ing at the aperture. Colour cream, the upper whorls pale orange, 

 the lower with bands of pale orange on periphery and shoulder, 

 only the latter reappearing on penultimate whorl; these bands 

 are visible within the aperture. Umbilicus and columella stained 

 a much deeper orange. Sculpture: faint irregular growth-lines. 



* Watson, Chall. Rep. Zool. xv. 1886, p.600, pi. xlv., fig. 12. 

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