BY C. HEDLEY. 493 



a short space. Outer lip formed by the last radial rib, inner a 

 little expanded and reflected. Umbilicus a narrow perforation. 

 Height l-Io mm.; breadth 08 mm. 



Several specimens from 17-20 fathomis. 



LlOTIA LATEBROSA, n.sp. 



(Plate xvi., fig.ll.) 



Shell small, globose, perforate. Colour buff. Whorls three, 

 flattened beneath the suture, thence rounded to the base. 

 Sculpture: about twenty radial puckers undulate the summit of 

 the last whorl, but disappear before reaching the periphery. 

 Around the umbilicus about a dozen similar radial riblets are 

 disposed. Fine close spiral threads parted by grooves of equal 

 height and breadth ornament the entire surface. Aperture 

 simple, subcircular, slightly angled anteriorly and posteriorly. 

 Umbilicus deep and narrow. Operculum externally concave, 

 shelly and multispiral. Its whorls answering to those of the 

 shell, parted by a deep sutural furrow and radially sculptured by 

 irregular raised lines. Height 1-35 mm.; major diam. 145 mm.; 

 minor diam. 1*1 mm. 



Numerous specimens from 17-20 fathoms. 



The shell resembles Leptothyra, but the operculum is of a 

 different type. It seems to me probable that neither Leptothyra 

 nor Collonia occurs in Australasian seas, and that the species which 

 have been ascribed to them ought to be transferred to Liotia. 



MOERCHIA INTROSPECTA, n.sp. 



(Plate XX., figs.47, 48,49.) 



Shell small, solid, hemispherical, bluntly keeled at the base, 

 rounded above. Colour white. Whorls four, parted by a 

 furrowed suture, rather rapidly increasing, first two descending, 

 third tilted, fourth inflated, at first ascending then suddenly 

 descending to the margin of the base, so that the spire projects 

 obliquely in a cavity formed by the ascent of the body-whorl. 

 Sculpture: the earlier whorls are smooth and glossy, the last 



