108 auriculidje. 



27. Auricula oryza. 



Shell imperforate, ovately fusiform, solid, smooth, shining; 

 alabaster- white, with a single white band ; spire produced, 

 conic, with the apex pointed ; suture linear ; whorls eight, flat, 

 the last about as long as the spire, slightly attenuated at base ; 

 aperture perpendicular, narrowly semiovate ; parietal plait single, 

 small, transverse below the middle ; columellar plaits two, mi- 

 nute, oblique, approximate ; peristome nearly simple ; right 

 margin marked within with two indistinct transverse ribs; co- 

 lumellar margin strongly callous, adnate. Length 10, breadth 

 4 mill. 



Ellobiuni oryza, H. and A. Adams in Prop. Zool. Soc. 1854, p. 8. 



n. 17 ; Gen. rec. Moll. ii. p. 237. 

 Auricula oryza, Pfr. Si/n. Auric, n. 148 ; Novit. Conch, i. p. 28. 



n. 47. t. 7. f. IT'-IO;' Mon. Auric, p. 141. 



Hah. Annaa, Society Islands. 



28. Auricula pusilla-. 



Shell imperforate, oblong-subulate, solid, smooth, shining, 

 whitish ; spire convexly conic, with the apex pointed ; whorls 

 seven, rather flat, somewhat imbricate, the last as long as the 

 spire, slightly attenuated at base; aperture nearly perpen- 

 dicular, narrow, rather elliptical ; parietal plait single, middle- 

 sized, rather transverse ; columellar plaits two, small, oblique, 

 parallel to each other ; peristome sharp, with the margins united 

 by a callus ; rignr margin somewhat thickened within, slightly 

 sinuate above, retreating at base; columellar margin callous, 

 adnate. Length 7, breadth 2| mill. 



Ellobiuni pusillum, H. and A. Adams in Proc. Zool. Soc. 1854, 



p. 8. n. 16 ; Gen. rec. Moll ii. p. 237. 

 Auricula pusilla, Pfr. Syn. Auric, n. 149 ; Novit. Conch, i. p. 39. 



n. 68. t. 10. f. 10-12 ; Mon. Auric, p. 142. 

 Mob. Isle of Negxos, Philippines. 



(Siona, subgenus of Cassidula, II. and A. Adams.) 



29. Auricula frumbntum. 



Shell imperforate, ovate-oblong, solid, rather smooth, slightly 

 shining, brownish ; spire short, convexly conoidal, mucronate ; 

 suture linear ; whorls five, the upper ones flat, the penultimate 

 convex, the last forming three-fourths of the total length, some- 

 what descending anteriorly, rounded at base ; aperture perpen- 

 dicular, linear, with three plaits : the upper plait deeply placed, 

 indistinct; the two others approximate; one parietal, compressed, 



