280 Transactions. 



striae" are crossed by equally fine microscopic spiral lines, in 

 places scarcely perceptible. Colour white. Spire sunken, con- 

 cave, broad and deep, with a minute dome-shaped projection 

 arising from and closing the axial perforation. Protoconch 

 showing as a minute globular central point. Aperture as. long 

 as the shell, narrow above, expanded and slighty effuse below. 

 Outer lip almost straight, sharp, rounded at both ends. Inner 

 lip spread as a thin callus over the inner wall, thickening upon 

 the columella, which is uniformly curved and has a slightly 

 reflected rounded margin ; the fold imperceptible. Altitude, 

 4*38 mm. ; diameter, 2"21 mm. 



Type in the Colonial Museum, Wellington. 



Obs. A fair number of dead shells were found. In dimensions 

 and contour this species is near to C. striata, Hutt., but the very 

 different form of the columella at once distinguishes it. 



6. Tornatina pachys, Watson. 



Utriculus (Tornatina) pachys, Watson, Journ. Linn. Soc. Lond., 

 vol. xvii, p. 331, 1883 ; " Challenger " Eeports, vol. xv, 

 p. 660, pi. xlix, fig. 8. 



A young shell, measuring 3 - 2 mm. by 1*6 mm., was found, 

 which may be Watson's species, but differing from it in the 

 slightly raised top and more distinct spiral striation. In all 

 other characters the specimen agrees with Watson's diagnosis 

 and figure. The differences may be due and peculiar to the 

 neanic stage of the species. 



7. Ringicula delecta, n. sp. Plate XXI, fig. 5. 



Shell small, oval-globular, imperforate, with a relatively 

 short conoidal spire, somewhat thin. The sculpture consists 

 of fine slightly variable spirals which somewhat strengthen 

 upon the base, and are a little wider than the grooves ; there are 

 eight to ten upon the penultimate whorl, and thirty to forty 

 upon the last, nine to twelve in front of the aperture. These 

 spirals are crossed by close irregular incremental striae, which 

 in places cut the spirals into minute gemmules, and when 

 prominent produce a lightly costate appearance. Colour white, 

 fresh specimens vitreous. Spire shorter than the aperture, acute, 

 terminating in a sharp apex. Protoconch of about two whorls, 

 the nucleus minute, slightly raised, smooth, the second turn 

 microscopically decussate. Whorls 5, rounded, the last pro- 

 portionately large, globular, and with convex base. Suture 

 impressed, not channelled. Aperture vertical, semi-lunar, angled 

 above, sinuated and with a very short open canal, notched at 

 the base. Outer lip convex, straightened at the periphery, 



