i 9 8 discovery reports 



slight basal broad shallow depression which proceeds from the suture in front of the 

 aperture, but it persists for only half a whorl and is not present towards the close of the 

 body whorl. Colour of shell light red-brown fading to white on the latter half of the 

 body whorl and the aperture. 



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



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



This species stands nearest to E. subfusca (Hutton, 1873), from which it differs in 

 being constantly smaller, with a proportionately more inflated body whorl, and in 

 having an aperture that is broader than high and the presence of a shallow depression 

 in front of the aperture. 



Estea manawatawhia, n.sp. (Plate LIII, fig. 3). 



Shell large for the genus, very thick and solid and strongly axially costate. Spire 

 twice height of aperture, elongate-conic, sides almost straight. Whorls five, including 

 a dome-shaped protoconch of i| whorls, which are faintly sculptured with about six- 

 teen rows of spiral punctate lines. All post-nuclear whorls sculptured with massive 

 axial costae, sixteen on the penultimate and eighteen on the last whorl. Intercostal 

 spaces equal to width of ribs. On the base there is a slight depression extending in 

 front of the aperture from the suture, but as in the preceding species it does not extend 

 over the latter half of the body whorl nor do the axial costae cross the level of this 

 basal depression. Aperture rather small, ovate, slightly higher than wide. Peristome 

 continuous across parietal wall, thin at edge but considerably thickened within. Colour 

 light brown banded with white. On the spire whorls the upper half of the whorl is 

 white and the lower brown, and on the base a second and narrower white band proceeds 

 from the suture. 



Height 2-7 mm. ; diameter 1-4 mm. (Holotype). 



Habitat: Off Three Kings Islands, Sts. 932, 933, 185 m. 



This species resembles E. semiplicata, Powell, 1927, but differs in having more 

 numerous axial ribs which extend over all the post-nuclear whorls. 



Genus Coenaculum, Iredale, 1924 

 Type (original designation) : Scalaria minutula, Tate and May 

 Coenaculum secundum, n.sp. (Plate LII, fig. 13). 



Shell minute, narrow, elongate, cylindrical, white. Whorls 5I, plus a large medially 

 carinate smooth protoconch of i| whorls, the tip inrolled. Spire tall, 2§ times height of 

 aperture. Outline of spire whorls slightly angled just above the middle. Body whorl 

 with a heavy rounded sutural keel. Base flat, imperforate. Post-nuclear sculpture of 

 thin flexuous axials which become almost obsolete on crossing the sutural keel. There are 

 about twenty-two axials on the body whorl. Aperture small, quadrate. Peristome dis- 

 continuous, thin, flexuous, sigmoid in profile, a broad deep sinus at the angle and pro- 

 duced forwards below it in an outward curve corresponding to the sinus. Columella 

 short, arcuate. Basal lip thin, straight and horizontal. 



