i86 DISCOVERY REPORTS 



with five strong rounded spiral ridges having subequal interspaces ; body whorl and base 

 with thirteen ridges, last three with slightly wider interspaces. Umbilicus minute but 

 deep. Aperture subcircular. Outer lip thin, without a varix. Inner lip represented by a 

 thin glaze on the parietal wall. Columella vertical, slightly arcuate and thickened. 



Height 0-85 mm. ; diameter o-8 mm. (Holotype). 



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



Lissotesta aupouria, n.sp. (Plate LI, fig. 7). 



Shell small, turbinate, widely umbilicate, thin, white; sculptured with numerous 

 weak axial threads which become obsolete on entering the umbilicus. Spire about two- 

 thirds height of aperture. Whorls 3I, including a low convex smooth protoconch of \\ 

 whorls. Aperture ovate-pyriform. Peristome continuous, thin. Suture impressed; 

 slightly shouldered. Umbilicus a little less than one-fourth diameter of shell. 



Height 1-9 mm.; diameter 1-9 mm. (Holotype). 



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



Lissotesta conoidea, n.sp. (Plate LI, fig. 6). 



Shell minute, conical, narrowly perforate, thin, semi-transparent white. Spire about 

 if height of aperture. Whorls 5I, including a small low convex protoconch of i| whorls. 

 Aperture comparatively small, squarish. Peristome sharp, discontinuous. Columella 

 arcuate, slightly expanded and reflexed below, but excavated in the vicinity of the 

 umbilicus, which is very small but deep. Outline of whorls lightly convex, surface 

 smooth except for moderately strong oblique axial growth lines. Suture false-margined. 



Height 1-4 mm.; diameter i-o mm. (Holotype). 



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



Genus Crosseola, Iredale, 1924 

 Type (original designation) : Crossea concinna, Angas 

 Crosseola favosa, n.sp. (Plate LI, fig. 13). 



Shell small, white, solid, turbinate-conic, imperforate. Sculpture consisting of 

 moderately strong narrow spiral cords connected axially by cords of equal strength. The 

 axial cords do not cross the spirals in regular series, each series between any two spirals 

 more or less alternating with those of the next series both above and below, the result 

 being a honeycomb effect. There are five spiral cords on the spire whorls and eight on 

 the body whorl, equispaced, except on the shoulder and also just above the fasciole on 

 the base, where in both places the interspace is wider. Spire equal to height of aperture. 

 Whorls 3I, including a small smooth protoconch of one low convex whorl. Aperture 

 circular. Peristome continuous, blunt-edged but not variced. Columella vertical, 

 slightly arcuate and produced below into a broad tongue-shaped process which marks 

 the termination of a heavy axially crenulated basal fold. Imperforate. 



Height 1-65 mm.; diameter 1-4 mm. (Holotype). 



Habitat: Off Three Kings Islands, Sts. 933, 934, 260 m. 



