538 Transactions. 



Mangilia hedleyi n. sp. Fig. 32. 



Description of Type Specimen. — Shell fusiform, the spire more than \\ 

 times the length of the aperture. Whorls 7 §, prominently angled above the 

 periphery, suture deep. Aperture narrow oblong, slightly oblique, angled 

 behind, truncate in front. Outer lip rather thick with sharp edge, sinus 

 deep and broad, separated from the body- whorl by a slight callus. Inner 

 lip narrow and thin. Canal short, wide. Sculp/are : Protoconch of 3 

 whorls, the upper quite smooth, the lower two with a spiral peripheral rib, 

 otherwise smooth. Adult whorls with prominent axial ridges, about 15 on 

 the body-whorl, terminating above the slightly contracted base. The whole 

 shell crossed by close spiral ribs, of which one is prominent on all the whorls 

 at the angle above the periphery, and on the penultimate and body-whorls 

 two others are prominent below this. Colour : Protoconch white, shining, 

 the extreme tip brown. Shell creamy white, with a broad dark-brown 

 spiral band at the suture, and continued over the base of the body- 

 whorl below the periphery. The extreme anterior end of the shell, the 

 edge of the outer lip, and a small patch on the body-whorl near it 

 are similarly coloured. The brown colour passes through the shell, and 

 appears distinctly in the interior of the aperture. 



Height, G mm. Diameter, 2-5 mm. 



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

 Sunday Island. 



Glyphostoma roseocincta n. sp. Fig. 33. 



Description of Type Specimen. — Shell broadly fusiform the aperture 

 slightly less than half the length of the shell. Whorls 5|, angled at the 

 periphery, suture deep. Aperture narrow rhomboid-oblique. Outer lip 

 thickened, denticulate within. Sinus deep, its posterior edge a small callous 

 ridge on the body-whorl. Inner lip thin, narrow. Columella with folds 

 very faintly indicated. Canal wide. Sculpture : Protoconch 1| whorls, 

 smooth. Shell with high axial ridges, 12 on the body-whorl, becoming 

 obsolete on the base. The whole crossed by regular equidistant raised 

 spiral threads, the interstices 2 or 3 times the width of the threads. Colour 

 pink, a broad spiral dark brownish-pink band at the suture and extended 

 round the base of the body-whorl. 



Height, 4 mm. Diameter, 2 mm. 



Variations from Type. — In most specimens no columellar folds can he 

 distinguished. 



Habitat. — Dead shells fairly common in dredgings in 10 m. to 30 m. on 

 gravelly bottom near Sunday Island. 



Iredalea n. gen. 



Shell narrow fusiform, turreted, the aperture about a third the length of 

 the shell. Canal short, wide. Sinus deep and broad, separated from the 

 body-whorl by a callosity. Protoconch of 4 whorls, sinusigera in form. 



Type. — Iredalea subtropicalis Oliver. 



Iredalea subtropicalis n. sp. Fig. 34. 



Description of Type Specimen. — Shell narrow, fusiform, truncated 

 anteriorly, aperture one-third the length of the shell. Whorls 9, of which 

 the protoconch forms 4, flatly rounded, suture impressed. Protoconch 

 sinusigera in form, the exposed portion of its lower lip concave. Aperture 



