104 AUBICTJLIDiE; 



18. Auricula semisculpta. 



Shell imperforate, elliptically ovate, thin, slightly shining, 

 faintly striated longitudinally, rather pellucid, yellowish ; spire 

 convexly conic, blunt ; suture linear ; whorls seven, rather fiat; 

 sculptured above with spiral series of impressed points, the 

 last forming about two-thirds of the total length, attenuated 

 at base, closely striated spirally below the middle; aperture 

 scarcely oblique, narrowly semiovate; parietal plait single, 

 middle-sized, slightly ascending near the columella, which is 

 callous, thickened, white, and provided with a single oblique 

 plait ; peristome sharp ; right margin arched forwards at its 

 middle part, with a thm white internal lip. Length 19, greatest 

 breadth 9 mill. 



Ellobium semisculptum, H. and A. Adams in Proc. Zool. Soc. 



1854, p. 9. n. 19; Gen. rec. Moll. ii. p. 237. 

 Auricula semisculpta, Pfr. Si/n. Auric, n. 139 ; Mon. Auric, p. 136. 

 Hah. Gambier Islands, Pacific Ocean. 



19. Auricula pellucens. 



Shell elliptical, rather thin, obsoletely striated, shining, 

 translucent, greyish -yellow ; spire conic, often eroded; suture 

 slightly bordered, irregular ; whorls six, the upper ones mode- 

 rately convex, the last forming two-thirds of the total length, 

 scarcely attenuated at base; aperture perpendicular, narrowly 

 semiovate; parietal plait single, slightly ascending near the 

 columella ; columella!' plait rather twisted, nearly perpendicu- 

 lar; peristome simple, with the margins united by a thin de- 

 posit ; right margin slightly dilated at its middle part ; colu- 

 mellar margin callous, adnate. Length 14-23, greatest breadth 

 7-lli m m. 



Auricula pellucens, Menke, Si/n, p. 78 ; ed. idt. p. 181. 



Kiist. Auric, p. 17. t. 2. f. 6, 7. 



Krauss, Siklafr. Moll. p. 82. 



Pfr. Syn. Auric, n. 140; Mm. Auric, p. 137. 

 Auricula Dominicensis, Fef. Prod?, p. 103. n. 6 ? 



Beck, Lid, p. 103. n. 8 ? 

 Conovulus pellucens, Voif/t hi Carter Thier. iii. p. 111. 

 Ellobium Ceylonicum, //. and A. Adams in Proc. Z. S. 1854, 



p. 8. n. 12. 

 Ellobium pellucens, H. and A. Adams, Gen. rec. Moll. ii. p. 237. 



Hab. Demerara (Menke) ; Natal (Kraass) ; Ceylon ( Gardner) ; 

 and West Indies ? (Ferussac). 



20. Auricula simplex. 



Shell imperforate, oblong, solid, slightly wrinkled longitu- 



