BY C. HEULEV. 450 



Mangelia perissa, n.sp. 

 (Plate xliv., figs.96-97.) 



Shell thin, ovate-fusiform, spire acuminate. Whorls five, and 

 a two-whorled protoconch, the latter subulate with spiral punc- 

 tate grooves. Colour dead wliite except a cinnamon protoconch. 

 Sculpture : spiral threads predominate, amounting on the body- 

 whorl to about thirty, not impinging on a broad anal fasciole, 

 beneath this strong and widely spaced, becoming feebler and 

 closer below the periphery, but waxing stronger on the back of 

 the canal; the penultimate carries six such spirals, then three, 

 then two on the earlier whorls. The radiak are stronger on tlie 

 younger whorls, but decrease on the older; in the last whorl they 

 fade away about the periphery, and in the penultimate scarcely 

 reach across the whorl. In every case they are overriden by the 

 spirals. Aperture elliptical; inner lip overlaid by a substantial 

 callus which, opposite the sulcus and at the base of the canal, is 

 provided by a small but sharp tubercle. Outer lip produced 

 externally into a prominent varix, and beset within by a row of 

 small tubercles. Canal short and broad. Length 74; breadth 

 2*9 mm. 



A few specimens, from 5-10 fathoms, Hope Island. The 

 extreme reduction of radial sculpture in this group is rare. I 

 cannot recall any near ally of this peculiar shell, some aspects of 

 which resemble Daphnella. 



Mangelia kigorata, n.sp. 



(Plate xliv., figs.98-99.) 



Shell small, oblong, turreted, rather solid. Colour dull white. 

 Whorls six, including a smooth three-whorled protoconch. whose 

 initial whorl is eccentric. Sculpture : from ten to twelve very 

 prominent, close, radial ribs, widest apart on the back of the last 

 whorl, and becoming closer on the earlier whorls. These ribs 

 project on the summit of the whorl and fade gradually on the 

 base. The last whorl is encircled by twelve to fourteen strong 

 spiral cords, which override both ribs and interstices; on the 



