GASTEROPODA 183 



rather steep-sided at first but perspective within, one-third the major diameter of the 

 shell. Aperture circular. Peristome entire, thin. 



Height 0-7 mm.; diameter 1-4 mm. (Holotype). 



Habitat: Off Three Kings Islands, St. 933, 260 m. 



Compared with the allied L. rotula (Suter, 1908) from 50 fathoms off the Snares 

 Islands, rotuloides differs in having more numerous and closely spaced radials and 

 stronger intercostal spiral striations. The radials in rotula average seventeen, compared 

 with twenty-eight in rotuloides. 



Genus Brookula, Iredale, 191 5 

 Type (original designation): Brookula stibarochila, Iredale 

 Brookula annectens, n.sp. (Plate LI, fig. 14). 



Shell minute, thin, white, depressed turbinate, perforate. Whorls 3 \> including a 

 small smooth globular protoconch of \\ whorls. Spire same height as aperture, outline 

 of whorls strongly convex. Post-nuclear sculpture of strong sharp-crested axial ribs, 

 with interstices 2-3 times width of ribs, and weak interstitial spiral striations. There are 

 eighteen axials on the body whorl, the last six being more closely spaced, and approxi- 

 mately twelve spiral striations on the penultimate whorl. Umbilicus narrow, about one- 

 ninth major diameter of base. There is no well-marked funicular slope as in the related 

 Upper Pliocene funiculata, and the ribs remain straight and undiminished until they 

 reach the umbilical perforation. Aperture circular ; peristome thin-edged and separated 

 from the body whorl. 



Height i-i mm.; diameter 1-2 mm. (Holotype). 



Habitat: Off Three Kings Islands, St. 933, 260 m. 



This species differs from the related Upper Pliocene funiculata, Finlay (1924, Trans. 

 N.Z. Inst., lv, p. 529) in being proportionately taller and in lacking the characteristic 

 funicular depression and variable basal ribbing of that species. 



Genus Cirsonella, Angas, 1877 

 Type : Cirsonella australis, Angas 

 Cirsonella paradoxa, n.sp. (Plate L, figs. 15, 16). 



Shell small, white, moderately solid, depressed, widely umbilicate. Whorls 3^, in- 

 cluding a smooth low convex protoconch of 1 1 whorls. Surface of post-nuclear whorls 

 crowded with extremely fine and dense spiral striae. From the umbilicus, which is 

 about one-fifth the major diameter of the base, there are twenty-five strong radial folds. 

 These are strongest at a little distance out from the edge of the umbilicus and fade out 

 entirely at about half way towards the periphery. Spire low, less than half the height of 

 the aperture. Whorls evenly rounded. Aperture circular. Peristome continuous, 

 slightly thickened and actually detached from the parietal wall. A faint spiral joins the 

 lower part of the inner lip. 



