By W. L. MAY. ^gc 



both in size and spacing; columella nearly straight, bear- 

 ing four strong oblique plaits. 



Length, 6 m.m.; breadth, 2.5 m.rn. 



Locality: Type from 100 fathoms seven miles east of 

 Cape Pillar, with several others; also in 80 fathoms 10 

 miles east of Schouten Island, one specimen. 



This appears so far to be a deep water species; it 

 closely approaches in form AL triplicata Tate, but is 

 readily distinguished by the four plaits and stronglv den- 

 ticulated outer lip. 



]^IARGIXELLA VERCOI, X.S.P. (PL. XIIL, FIG. 7.) 



Shell pyriform, broadly shouldered, especially over 

 the aperture, and with a prominent spire; colour pure 

 white and shining; whorls five, rounded; aperture narrow, 

 widening somewhat towards the scjuared anterior end; 

 outer lip thick, nearly straight, after bending well forward 

 from the shoulder, with about six denticles near the 

 centre of its length on the inner edge; columella some- 

 what excavate, bearing four plaits, the first with a strong 

 upward sweep from the base, the others less oblique, 

 smaller, and wider spaced as they ascend. 



Length, 5.5 m.m.; l^readth, 3.5 m.m. 



Locality: Type from 100 fathoms seven miles east of 

 Cape Pillar, with many others, some living; also in 80 

 and 40 fathoms ofT Schouten Island; many in the former, 

 luit less in the latter depth. 



This handsome species is very constant in size and 

 form ; it has a resemblance to M, laevigata Brazier, which, 

 however, is a much broader and more massive shell, with 

 a shorter spire and mammillated apex. It has also been 

 taken in deep water in South Australia by Dr. Verco, to 

 whom I have much pleasure in dedicating it. 



:\IARGIXELLA GATLIFFI, N.S.P. (PL. XIIL, 

 FIG. 8.) 



Shell broadly pyriform, solid, with a moderately ele- 

 vated l^lunt spire, very broad shouldered, but becoming 

 auite narrowed in front; colour vellowish white; whorls 



