337 



wider than the interspaces, thirteen in the penultimate, un- 

 dulating the suture, vanishing on the base of the body-whorl 

 and towards the aperture. Articulated with infrasutural 

 large irregular blackish-brown blotches, about nine in the 

 body-whorl : and with two similar approximate spiral rows, 

 the upper the larger, winding round the base from the back 

 of the aperture, below which are dark maculations. A spiral 

 of close-set axial, narrow, brown hair-lines covers the lower 

 third of each spire-whorl, and runs between the two rows of 

 larger articulations on the body-whorl. 



Dim. — Length, 12 mm. ; body-whorl, 625 mm. ; width, 

 5 mm. 



Locality. — Type, beach Petrel Bay, St. Francis Island, 

 many; MacDonnell Day, rare. 



It is named after Master Francis Arnold, of St. Francis 

 Island, who was of great help to me when collecting on that 

 island, made historic by the visits of Matthew Flinders and 

 Mons. Baudin. 



Mitra bellapicta, n. sp. PL xxv., fig. 1. 



Shell elongate-oval, of 7 whorls, including a blunt pro- 

 toconch of 2 smooth, convex whorls. Spire-whorls convex, 

 fullest just below the middle. Sutures linear, impressed. 

 Base roundly contracted. Aperture obliquely narrowly oval. 

 Canal wide, very short, slightly recurved, scarcely notched. 

 Columellar plaits four, strong, the lowest very small. Outer 

 lip thin and simple. Axial costse, twelve in the penultimate, 

 six in the body-whorl, vanishing towards the base and to- 

 wards the aperture ; three spiral cords wind over the dorsum 

 of the base, above, and smaller than the columellar plaits. 



Colour pinkish-brown. The spire-whorls have a white 

 band just below the middle, bounded above and below by a 

 line of opaque-white spots, and outside this by a fine broken 

 brown hair-line. - There is a row of small brown spots below 

 the suture. In the body-whorl is also an articulated spiral 

 of closely-set, axially-curved white and brown spots, commenc- 

 ing just within the back of the aperture. Obscure white and 

 brown maculations tint the front of the base. 



Dim . — Length, 9'6 mm. ; body-whorl, 5'5 mm. ; width, 

 51 mm. 



Locality. — Type from 40 fathoms off Beachport, with 12 

 others in moderate condition. 



This may be a variety of M. vincta, A. Adams (voluto- 

 mitra), close to M. weldii, Tenison-Woods. 



