AUEICULIDiE. 45 



within, modified by three plaits, which are almost equally 

 distant; parietal plaits two, convergent, the upper one the largest; 

 columellar plait dentiform ; peristome simple, sharp, with the 

 margins united by a shining deposit ; right margin thickened 

 within by a white callus without teeth. Length 14, breadth 

 7 mill. 



Marinula pepita, King in Zool. Journ. v. p. 344. 



Gray in Proc. Z. S. 1847, p. 179. 



H. and A. Adams in Proc. Z. 8. 1854, p. 35. n. 1 ; Gen. rec. 

 Moll. ii. p. 247. pi. 83. f. 2 a. 



Pfr. Syn. Auric, n. 00 ; 3fon. Auric, p. 59. 

 Auricula pepita, Peeve, Conch. Syst. ii. pi. 187. f. 1. 



Kiist. Auric, p. 35. t. 5. f. 3-5. 

 Pythia pepita, Beck, Ind. p. 104. n. 9. 

 Conovulus triplicatus, Anton, Verzeichn. p. 48. n. 1779. 

 Auricula Reclusiana, Petit in Proc. Z. S. 1842, p. 201. 

 Marinula Reclusiana, H. and A. Adams in Proc. Z. S. 1854, p. 35. 

 n. 5. 



Hab. San Carlos, Chiloe (King) ; River Maide, Chile (Anton); 

 Isle of Tumaco, West Columbia (H. Owning). 



2. Mabinula acuta. B.M. 



Shell fusiform, rather solid, slightlj r striated, shining, fulvous, 

 irregularly marked with reddish-brown streaks ; spire con- 

 vexly conic, with the apex pointed, sometimes eroded ; suture 

 slight, rather simple ; whorls six to seven, nearly flat, the last a 

 little longer than the spire, slightly attenuated at base ; aperture 

 perpendicular, semiovate ; parietal plaits two, compressed, con- 

 vergent ; columellar plait tooth-shaped ; peristome simple, 

 straight, with the columellar margin appressed. Length 12|, 

 breadth 5^ mill. 



Auricula acuta, D'Orb. Synops. (in\Guer. Mag. 1835) p. 23. n.2 



Voyage Amerique, p. 320. pi. 42. f. 4-G. 



C. B. Adams in Ann. Lye. Neiv York, 1852, v. p. 432 ? 

 Pythia acuta, Beck, Ind. p. 104. n. 10. 

 Alexia acuta, H. and A. Adams in Proc. Z. S. 1854, p. 33. n. 5 ; 



Gen. rec. Moll. ii. p. 241. 

 Alexia acuta, Pfr. Syn. Auric, n. 158. 

 Marinula acuta, Pfr. Mon. Auric, p. 00. 



Hab. Province of Guayaquil, Columbia (D'Orb.); Panama 

 (Adams). 



3. Maiunula nigua. 



Shell imperforate, ovate-acuminate, wrinkled, solid, opaque, 



