BY C. HEDLEY. 525 



bend a little on crossing the whorl, and taper on the base. The 

 last whorl has about twenty; they do not continue from whorl to 

 whorl, but are interrupted at the suture. There is no trace of 

 spiral sculpture. Aperture small, perpendicular, rounded beneath, 

 angled above, peristome slightly thickened, columellar fold slight,, 

 oblique. Length 2-95, breadth 1-1 mm. 



Hah, — Chinaman's Beach, near Sydney; two specimens in shell 

 sand (Miss L. Parkes). 



T y p e. — Miss Parkes has kindly presented her type-specimen 

 to the Australian Museum. 



A form, apparently a variety of this, has been collected at 

 Caloundra, Queensland, by H. L. Kesteven. It is smaller than 

 the Sydney specimens, and white with three orange spiral threads. 



The Queensland 0. pupa Watson, and 0. kymatodes Watson,* 

 seem allied, but according to the description the former has feebler 

 ribs, and in the latter the broadened summits of the ribs coalesce 

 and crown the whorls with a continuous ridge. Neither species 

 has the dark spiral lines. 



Herviera isidella Melvill & Standen,t from New Caledonia, is 



much like this, but differs in outline, has narrower, straighter ribs 



and no colour bands. The genus Herviera appears superfluous? 



in forming it the authors probably overlooked Odostomella Bucq. 



Dautz & Dollf.j 



Leiostraca inusta, n.sp. 



(Plate xxxiii., fig. 43.) 



Shell small, thin, almost translucent, blunt-topped, smooth. 

 Whorls six and a half, gradually increasing. Colour white, baser 

 aperture, and sometimes a varix, cinnamon-brown. No sculpture 

 except a few weak irregular varices. Sutures ragged. Aperture 

 oval, peristome slightly thickened and reflected. Length 2*75, 

 breadth 085 mm. 



Hab. — Manly Beach (Miss L. Parkes). 



Type. — To be presented to the Australian Museum. 



* Chall. Rep. Zool. xv. 1S86, p.486. 



t Journ. of Conch, ix 1899, p. 186, fig. 



X Moll. Mar. Rosillon, i. 1883, p. 167. 



