Oliver. — Mollusca of the Kermadec Islands. ql9 



giving a small umbilical depression. Sculpture : Protoconch of 1| whorls 

 spirally ribbed, there being 4 spirals on the lower whorl. First adult whorl 

 with pronounced longitudinal plications, crossed by 3 spirals, 2 near the 

 upper and 1 near the lower suture, and slightly beaded at the intersections. 

 In the succeeding whorls the three spirals are more pronounced and the 

 central space is faintly spirally ribbed, the axial plications remaining fairly 

 prominent. In the body-whorl the longitudinals become obsolete at the 

 periphery, while there are about 12 spiral ribs, the upper one most pro- 

 minent, the 4th and 5th least so. Colour : White with spiral brown lines ; 

 the protoconch ribs are brown, also the two upper and one lower spiral ribs 

 on the succeeding whorls, and 1st to 3rd and 6th to 10th spirals on the body- 

 whorl, leaving the peripheral two white. 



Height, 1-8 mm. Diameter, 1 mm. 



Habitat. — Dead shells dredged abundantly in 10 m. to 30 m. on gravelly 

 bottom off Sunday Island. 



Notosetia electra n. sp. Fig. 10. 



Description oj Type Specimen. — Shell minute, ovate, apex obtuse. 

 Whorls 3|, flattened, suture distinct. Aperture circular, peristome thin, 

 not continuous. A small umbilical depression between the inner lip and 

 the body-whorl. Sculpture : Protoconch smooth. Shell with microscopic 

 spiral striae indicated. Colour pink. 



Height, 0-7 mm. Diameter, 0-4 mm. 



Habitat. — A few dead shells dredged on gravelly bottom near Sunday 

 Island. 



Merelina pisinna (Melvill and Standen). 



Alvania pisinna Melv. & Stand., Journ. Conch., viii, 305, 1896. 



Habitat- -Dead shells dredged abundantly in 10 m. to 30 m. on gravelly 

 bottom near Sunday Island. 



Distribution. — Loyalty Islands. 



Onoba carnosa (Webster). 



Rissoia carnosa Webster, Trans. N.Z. Inst., 37, 278, 1905. 

 Recorded, Iredale, Pro. Mai. Soc, ix, 71, 1910 (Rissoa). 



This species occurs in four fairly well-defined colour-varieties, which 

 may be characterized as under : — 



1. Var. typica. — Spirally marked brown and white ; the lower half of 

 each whorl brown, the upper half white. 



2. Var. jusca. — The whole shell brown. 



3. Var. alba. — The whole shell white. 



4. Var. bicolor. — Spire brown, body-whorl white. 



Habitat. — Dead shells abundant in dredgings on gravelly bottom in 

 10 m. to 30 m. near Sunday Island. 



Distribution. — New Zealand (varieties typica. jusca, and bicolor). 



Onoba candidissima Webster. 



Rissoia candidissima Webster, Trans. N.Z. Inst., 37, 278, 1905. 

 Recorded, Iredale, Pro. Mai. Soc, ix, 71, 1910 (Rissoa). 



Habitat. — Dead shells dredged on gravelly bottom in 10 m. to 30 m. near 

 Sunday Island. 



Distribution . — New Zealand. 



