438 MOLLUSCA FROM THE HOPE ISLANDS, N. QUEENSLAND, 



ing the keel of preceding whorl. Keel broad, projecting a fold 

 beneath. Sculpture : above are about sixteen equidistant fine 

 pitted grooves, and on the base half as many. Base rounded. 

 Umbilicus broad and deep, angled at the margin, about one- 

 quarter of the shell's diameter. Aperture entire, oblique, ovate, 

 lip a little reflected below. Height 9; maj. diam 2-1; minor 

 diam. 1*55 mm. 



Two specimens, from 8 fathoms, off the Bloomfield entrance, in. 

 Weary Bay. 



Cyclostrema torridum, n.sp. 

 (Plate xl., figs.49-51.) 



Shell small, depressed, turbinate, perforate, thin, subtrans- 

 lucent. Colour white. Whorls three, rounded, loosely coiled and 

 rapidly increasing. Surface smooth and very glossy. Apei ture 

 subcircular, outer lip simple, inner lip expanded and bent towards 

 the axis. Base rounded, umbilicus very narrow. Height 1-1; 

 major diam. 1-2; minor diam. 0-9. 



Numerous specimens, from 5-10 fathoms, off the Hope Islands. 

 Allied to the southern C. porcellamnn Tate & May, which is more 

 elevated and a little larger. 



Neritina oualaniensis Lesson. 



iY. oualaniensis Lesson, Zool. Coquille, ii. 1830, p.379; JW iiala- 

 nensis von Martens, Conch. Cab. 1879, p.l93, Pl.xx.: iV". merto- 

 niana Brazier, these Proceedings, ii. 1877, p.21, 



This species is abundant on the mud-flats at the entrance of 

 the Bloomfield River. The beautiful colour-variety, termed 

 frondicincla by von Martens, is predominant. Thougli Brazier 

 had already recorded it under Recluz' synonym from the Pahn 

 Islands, I had overlooked it in compiling my catalogue of the 

 moUusca of Queensland.* 



* Report Australasiciii Association Advancement of Science. Vol. xii, 

 Brisbane, 1909. 



