PKKSTON : ON NEW MARINE SHELLS. 60 



the suture, owing to the spiral grooves being deeper in this region ; 

 suture rather deeply imjjressed ; peristome thin and somewhat dilated 

 below ; columella straight, a callositj' joining it with the lip above ; 

 aperture ovate, a row of small denticles appearing inside about 1 milli- 

 metre from the edge of the peristome; canal short. Alt. 16'25, diam. 

 maj. 8-75 mm. ; apertiare, alt. 7, diam. maj. 3 mm. 



Rab.— Ceylon (?). 



This species appears to be allied to JV. eranea, Melvill & Standen, 

 from the Persian Gulf,' but is a rather larger and coarser shell than 

 that species ; moreover, N. eranea is much smoother, and does not 

 pi-esent the beaded appearance so noticeable in the present species. 

 Marginella subflava, n.sp. 



Shell pyriform, solid, cream-coloured ; spire obtuse, almost immersed ; 

 whorls 3 ; columella bearing 6 or 7 fine plaits ; outer lip somewluit 



thickened, finely denticulate within. Alt. 6, diam. maj. 4 mm. 

 aperture, alt. 5-50, diam. maj. 



^rt^._Ceylon (?). 



The specimens examined vary somewhat in size. 



Allied to M. detis, Reeve, but differs from that species in the finer 

 plaits on the columella, in the much finer denticulations of the outer 

 lip, and in the colouring of the shell, M. dens being pure white. 

 Marginella ebuknea, n.sp. 



Shell narrowly conical, solid, shining, pure white ; whorls 4-5 ; 

 suture rather deeply impressed ; columella five-plaited ; outer lip 



flexuous and denticulate within. Alt. 5, diam. maj. 2-25 mm. ; 

 aperture, alt. 3, diam. maj. -50 mm. 

 ^rt*._CeyIon (?). 



Proc. Zool. Soc, vol. ii (1901), p. 410, pi. xxiii, fig. i: 



