BY C. HEDLEY. 505 



angled above, effuse below, outer lip sinuate, columella with a 

 single prominent fold. Height 2*3 mm.; breadth 1-3 mm. 



A single specimen from 17-20 fathoms, is specifically distin- 

 guished by the sculpture. 



Odostomia henni Brazier. 



Odostomiahenni Brazier, These Proceedings (2),ix.l894, p.l71, 

 pl.xiv. fig. 2. Pyrgulina perspectiva Hedley, These Proceedings 

 xxvii. 1902, p.lO, pl.iii. fig.33. 



On reconsideration I would now withdraw my P. perspectiva 

 as a synonym of 0. henni. A series from 17-20 fathoms off 

 Mast Head supplies a locality intermediate between those 

 hitherto recorded. I find that I also took this species under 

 stones at low water in Port Moresby, Papua, in 1890. 



MUCRONALIA BIZONULA MelviU. 



Melvill, Proc. Malacol. Soc. vii. 1906, p.72, pl.viii. fig.31. 



A single immature shell from 17-20 fathoms off Mast Head 

 corresponds well to the account of one recently described by 

 Mr. J. C. Melvill from the Persian Gulf. 



Stilifer orbiculatus, n.sp. 

 (Plate xviii., fig.37.) 



Shell small, globose, narrowly perforate. Whorls six, rapidly 

 increasing; first two stiliform, third and fourth sharply angled 

 on the shoulder, last two rounded. Sculpture: low radial undu- 

 lations crossed by minute incised spiral lines. Colour pale yellow, 

 warming to orange on the spire. Aperture pyriform, lip sharp, 

 a thin callus on the body-whorl. Columellar margin reflected over 

 a narrow perforation. Height 4*4 mm.; breadth 44 mm. 



One weathered shell from 17-20 fathoms. 



Stilifer auricula, n.sp. 

 (Plate xviii., tig.36.) 



Shell minute, turbinate, with a subulate spire. Colour white. 

 Whorls six, the final one swollen, globose; the penultimate much 



