THE MOLLUSCA—HEDLEY. 475 
OLATHURELLA IRRETITA, Sp. NOV. 
(Fig. 43). 
Shell ovate-fusiform, narrow, tur- 
retted and sharply angled below a 
sloping shoulder, Colour white, from 
the suture to the angle opaque, below 
the angle hyaline with opaque beads ; 
protoconch buff yellow, a splash of 
the same on the anterior dorsal por- 
tion of the last whorl; a pale yellow 
thread, confined to one spiral cord, 
ascends each whorl below the angle, 
and another surrounds the last whorl 
below the periphery. Adult whorls 
four andahalf. Sculpture—the last 
whorl bears fifteen longitudinal costee 
: which cross the flattened part of the 
Fig. 43. whorl obliquely, here they are separ- 
ated by twice their breadth ; above 
the angle they bend and enlarge suddenly, towards the base they 
curve in and vanish at the basal constriction. On the penultimate 
whorl these cost alternate with those below the suture. These 
longitudinal coste are over-ridden by a series of fine sharp spiral 
cords knotted at each costa ; the last whorl carrying four larger 
and more undulating ones above the angle and ten below it; on 
the base are six simple cords. Protoconch horny, maunillate, 
three and a half whorled, the larger sculptured with a raised net- 
work, contrasting sharply by colour and texture with the adult 
shell, which suddenly commences with a thick raised white tongue 
at the suture. Aperture narrow and elliptical, columella arched, 
overlaid by a callus which ends abruptly where the mouth narrows. 
Canal short and wide. Outer lip massive, ridged externally by a 
dozen transverse cords which denticulate the edges ; within are 
seven weak entering ridges. The aperture mounts the preceding 
whorl to the height of two spiral cords, and encloses a deep wide 
anal notch with a prominent callus. Length 5, breadth 2 mm. 
One specimen from the lagoon beach of Funafuti. 
Closely allied to Clathurella ewzonata, Hervier,* from which it 
differs by being narrower, sharper angled, and sculptured by finer 
and more numerous cords. With his species Hervier associates 
C. bilineata, Angas, and C. bifascratum, Pease. 
DAPHNELLA DELICATA, Reeve. 
Reeve, Conch. Icon., i., 1846, “ Pleurotoma,” pl. xxxiv., sp. 310; 
Tryon, Joc. cit., p. 301, pl. xxvi., fig. 80. 
* Hervier—Journ. de Conch., xliv., 1896 (1897), p. 143; #bid., xlv., 
1897, p. 102, pl. ii., fig. 6. 
